# Danube

> Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Danube
> Markdown URL: https://mediated.wiki/source/Danube.md
> Source: https://en.wikipedia.org/wiki/Danube
> Source revision: 1357099989
> License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/)

{{Short description|Second-longest river in Europe}}
{{About|the river}}
{{Redirect|Istrus|the Greek figure|Istrus (mythology)|the ancient city|Histria (ancient city)}}
{{Use dmy dates|date=November 2023}}
{{Use American English|date=June 2020}}
{{Infobox river
| name               = Danube 
| native_name        = {{native name list |tag1=de |name1=Donau |tag2=sk |name2=Dunaj |tag3=hu |name3=Duna |tag4=hr |name4=Dunav |tag5=sr |name5={{lang|sr-Cyrl|Дунав}} / {{lang|sr-Latn|Dunav}} |tag6=bg |name6=Дунав |tag7=ro |name7=Dunărea |tag8=uk |name8=Дунай |tag9=tr |name9=Tuna}}
<!-- IMAGE & MAP -->
| image              = View from Gellért Hill to the Danube, Hungary - Budapest (28493220635).jpg
| image_caption      = The Danube in [Budapest](/source/Budapest)
| mapframe = yes
| mapframe-wikidata = yes
| mapframe-stroke-color = #4287f5
| map_caption        = Course of the Danube
<!-- LOCATION -->
| subdivision_type1  = Countries
| subdivision_name1  = {{hlist|[Germany](/source/Germany)|[Austria](/source/Austria)|[Slovakia](/source/Slovakia)|[Hungary](/source/Hungary)|[Croatia](/source/Croatia)|[Serbia](/source/Serbia)|[Bulgaria](/source/Bulgaria)|[Romania](/source/Romania)|[Moldova](/source/Moldova)|[Ukraine](/source/Ukraine)}}
| subdivision_type5  = Cities
| subdivision_name5  = {{hlist|[Ulm](/source/Ulm)|[Ingolstadt](/source/Ingolstadt)|[Regensburg](/source/Regensburg)|[Passau](/source/Passau)|[Linz](/source/Linz)|[Vienna](/source/Vienna)|[Bratislava](/source/Bratislava)|[Győr](/source/Gy%C5%91r)|[Komárno](/source/Kom%C3%A1rno)/[Komárom](/source/Kom%C3%A1rom)|[Budapest](/source/Budapest)|[Dunaújváros](/source/Duna%C3%BAjv%C3%A1ros)||[Mohács](/source/Moh%C3%A1cs)|[Apatin](/source/Apatin)|[Vukovar](/source/Vukovar)||[Ilok](/source/Ilok)|[Bačka Palanka](/source/Ba%C4%8Dka_Palanka)||[Novi Sad](/source/Novi_Sad)||[Sremski Karlovci](/source/Sremski_Karlovci)|[Belgrade](/source/Belgrade)|[Pančevo](/source/Pan%C4%8Devo)|[Smederevo](/source/Smederevo)|[Drobeta-Turnu Severin](/source/Drobeta-Turnu_Severin)|[Vidin](/source/Vidin)|[Calafat](/source/Calafat)|[Giurgiu](/source/Giurgiu)|[Ruse](/source/Ruse%2C_Bulgaria)| [Silistra](/source/Silistra)|[Călărași](/source/C%C4%83l%C4%83ra%C8%99i)|[Brăila](/source/Br%C4%83ila)|[Galați](/source/Gala%C8%9Bi)|[Reni](/source/Reni%2C_Ukraine)|[Izmail](/source/Izmail)|[Kiliia](/source/Kiliia)|[Tulcea](/source/Tulcea)|[Sulina](/source/Sulina)}}
<!-- PHYSICAL CHARACTERISTICS -->
| length_km = 2,850
| length_ref = <ref>{{cite encyclopedia|url=https://www.britannica.com/place/Danube-River|title=Danube River|encyclopedia=Encyclopædia Britannica |edition=Online |access-date=30 April 2022}}</ref>
| width_min          = Middle Danube ([Iron Gates](/source/Iron_Gates)) {{cvt|150|m|abbr=on}}; Lower Danube ([Brăila](/source/Br%C4%83ila)) {{cvt|400|m|abbr=on}}<ref name="Long-term Morphological Development of the Danube in Relation to the Sediment Balance"/>
| width_avg          = Upper Danube {{cvt|300|m|abbr=on}}; Middle Danube {{cvt|400-800|m|abbr=on}}; Lower Danube {{cvt|900-1,000|m|abbr=on}}<ref name="Hydromorphological balance">{{cite web|url=https://www.osce.org/files/f/documents/0/8/32944.pdf |title=Hydromorphological balance of the Danube River Channel on the Sector between Bazias (km 1072.2) and Danube Delta Inlet (km 80.5) |last=Bondar |first=Constantin |publisher=[osce.org](/source/osce.org) |access-date=30 April 2022}}</ref><ref name="Long-term Morphological Development of the Danube in Relation to the Sediment Balance"/><ref name="ICPDR">{{cite web|url=http://www.icpdr.org|title=ICPDR}}</ref>
| width_max          = Middle Danube {{cvt|1,500|m|abbr=on}}; Lower Danube {{cvt|1,700|m|abbr=on}}<ref name="ICPDR"/><ref name="Long-term Morphological Development of the Danube in Relation to the Sediment Balance">{{cite web|url=https://www.interreg.eu|title=Long-term Morphological Development of the Danube in Relation to the Sediment Balance}}</ref>
| depth_min          = {{cvt|1|m|abbr=on}} (Upper Danube)<ref name="ICPDR"/>
| depth_avg          = Upper Danube {{cvt|8|m|abbr=on}}; Middle Danube {{cvt|6-10|m|abbr=on}}, {{cvt|53|m|abbr=on}} ([Iron Gates](/source/Iron_Gates)); Lower Danube {{cvt|9|m|abbr=on}}<ref name="Hydromorphological balance"/><ref name="Long-term Morphological Development of the Danube in Relation to the Sediment Balance"/><ref name="ICPDR"/><ref name="Republic Hydrometeorological Service of Serbia">{{cite web|url=http://www.hidmet.gov.rs|title=Republic Hydrometeorological Service of Serbia}}</ref>
| depth_max          = Middle Danube ([Iron Gates](/source/Iron_Gates)) {{cvt|90|m|abbr=on}}; Lower Danube {{cvt|34|m|abbr=on}}<ref name="Long-term Morphological Development of the Danube in Relation to the Sediment Balance"/>
| river_system       =Danube
| progression        =[Black Sea](/source/Black_Sea)
| discharge1_location=[Danube Delta](/source/Danube_Delta)
| discharge1_min     = {{convert|1,790|m3/s|cuft/s|abbr=on}}<ref name="hidrogycal">{{citation|url=https://www.limnology.ro/water2012/Proceedings/001.pdf |title=The Danube River in the Pontic Sector – Hidrologycal Regime |last1=Gâştescu |first1=Petre |last2=Țuchiu |first2=Elena |work=Water resources and wetlands: Conference Proceedings |location=Tulcea, Romania |editor-first1=Petre |editor-last1=Gâştescu |editor-first2=William |editor-last2=Lewis William Jr |editor-first3=Petre |editor-last3=Breţcan |date=2012 |isbn=978-606-605-038-8 |page=18}}</ref><ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS">{{cite web|url=https://www.limnology.ro/wrw2023/proceedings.html|title=THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS}}</ref> 
| discharge1_avg     =(Period: 1931–2020){{cvt| 6,452|m3/s|cuft/s|abbr=on}}<ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/><ref name="auto">{{cite web|url=https://unece.org/DAM/env/documents/2019/ece/Restart/Ukraine_S1/Points_of_view_expressed_by_the_Romanian_authorutues_and_scientific_research_institute.pdf |title=Points of view expressed by the Romanian authorities and scientific research on the Ukraine's document "Annotated Report on Scientific Research – Complex Environmental Monitoring for the Danube – Black Sea Deep Water Navigation Canal operation in 2017–2018. The Sea Approach Canal Zone" |publisher=unece.org |access-date=30 April 2022}}</ref>
| discharge1_max     = {{convert|15,900|m3/s|cuft/s|abbr=on}}<ref name="hidrogycal"/><ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/> 
| discharge5_location= [Passau](/source/Passau) ([Bavaria](/source/Bavaria), 30 km before town)
| discharge5_avg     =(Period: 1931–2020){{convert|580|m3/s|cuft/s|abbr=on}}<ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/>
| discharge4_location= [Vienna](/source/Vienna)
| discharge4_avg     =(Period: 1931–2020){{convert|1,920|m3/s|cuft/s|abbr=on}}<ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/>
| discharge3_location= [Budapest](/source/Budapest)
| discharge3_avg     =(Period: 1931–2020){{convert|2,350|m3/s|cuft/s|abbr=on}}<ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/>
| discharge2_location= [Belgrade](/source/Belgrade)
| discharge2_avg     =(Period: 1931–2020){{convert|5,300|m3/s|cuft/s|abbr=on}}<ref name="THE DANUBE RIVER AND ITS DELTA, HYDROGEOGRAPHYC CHARACTERISTICS-ACTUAL SYNTHESIS"/> 
<!-- BASIN FEATURES -->
| source1            = [Breg](/source/Breg_(river))
| source1_location   = [Furtwangen im Schwarzwald](/source/Furtwangen_im_Schwarzwald), [Baden-Württemberg](/source/Baden-W%C3%BCrttemberg), Germany
| source1_coordinates= {{coord|48|05|44|N|08|09|18|E|display=inline}}
| source1_elevation  = {{convert|1,078|m|abbr=on}}
| source2            = [Brigach](/source/Brigach) 
| source2_location   = [St. Georgen im Schwarzwald](/source/Sankt_Georgen_im_Schwarzwald), [Baden-Württemberg](/source/Baden-W%C3%BCrttemberg), Germany
| source2_coordinates= {{coord|48|06|24|N|08|16|51|E|display=inline}}
| source2_elevation  = {{convert|940|m|abbr=on}}
| source_confluence_location   = [Donaueschingen](/source/Donaueschingen), [Baden-Württemberg](/source/Baden-W%C3%BCrttemberg), Germany
| source_confluence_coordinates= {{coord|47|57|03|N|08|31|13|E|display=inline}}
| mouth              = [Danube Delta](/source/Danube_Delta)
| mouth_location     = Romania
| mouth_coordinates  = {{coord|45|13|3|N|29|45|41|E|display=inline,title}}
| basin_size_km2 = 801,463
| basin_size_ref = <ref name="ICPDR"/>
}}
{{River Danube routemap}}

The '''Danube''' ({{IPAc-en|ˈ|d|æ|n|.|j|uː|b}} {{respell|DAN|yoob}}; see also other names) is a [river](/source/river) in Europe, the [second-longest](/source/List_of_rivers_of_Europe) after the [Volga](/source/Volga) in Russia.<ref>{{Cite web |last=Water |first=Connor Brighton February 1 2023 in Bodies of |date=2023-02-01 |title=10 Longest Rivers In Europe |url=https://www.worldatlas.com/rivers/10-longest-rivers-in-europe.html |access-date=2026-03-30 |website=WorldAtlas |language=en-US}}</ref> It flows through Central and Southeastern Europe, from the [Black Forest](/source/Black_Forest) of Germany<ref name=":0">{{Cite news |title=Danube River {{!}} Map, Cities, Countries, & Facts {{!}} Britannica |url=https://www.britannica.com/place/Danube-River |archive-url=http://web.archive.org/web/20251230221834/https://www.britannica.com/place/Danube-River |archive-date=2025-12-30 |access-date=2026-03-30 |work=Encyclopedia Britannica |language=en}}</ref> south through the [Danube Delta](/source/Danube_Delta) in [Romania](/source/Romania) into the [Black Sea](/source/Black_Sea).<ref name=":0" /> A large and historically important river, it was once a frontier of the [Roman Empire](/source/Roman_Empire). In the 21st century, it connects ten European countries, running through their territories or marking a border. Originating in Germany, the Danube flows southeast for {{convert|2850|km|mi|sp=us|abbr=on}}, passing through or bordering Austria, Slovakia, Hungary, Croatia, Serbia, Romania, Bulgaria, Moldova, and Ukraine.<ref>{{Cite web |last=yakubova@upenn.edu |date=2017-09-01 |title=Danube River |url=https://rees.sas.upenn.edu/about/spotlight/danube-river |access-date=2026-03-30 |website=Russian and East European Studies |language=en}}</ref> Among the many [cities on the river](/source/List_of_cities_and_towns_on_the_river_Danube) are four national capitals: [Vienna](/source/Vienna), [Bratislava](/source/Bratislava),<ref>{{Cite web |title=Danube River in Bratislava {{!}} bratislava-city.sk |url=https://bratislava-city.sk/danube-river/ |access-date=2026-03-30 |language=cs}}</ref> [Budapest](/source/Budapest),<ref>{{Cite web |last=Péter |first=László |date=March 23, 2026 |title=Budapest |url=https://www.britannica.com/place/Budapest/People |url-status=live}}</ref> and [Belgrade](/source/Belgrade). Its drainage basin amounts to {{Convert|817000|km2|abbr=on}} and extends into nine more countries.

The Danube's longest headstream, the [Breg](/source/Breg_(river)), rises in [Furtwangen im Schwarzwald](/source/Furtwangen_im_Schwarzwald), while the river carries its name from its source confluence in the [palace park](/source/Donaueschingen_Palace) in [Donaueschingen](/source/Donaueschingen) onwards. Since ancient times, the Danube has been a traditional trade route in Europe. Today, {{convert|2415|km|mi|abbr=on}} of its total length are navigable. The Danube is linked to the [North Sea](/source/North_Sea) via the [Rhine–Main–Danube Canal](/source/Rhine%E2%80%93Main%E2%80%93Danube_Canal), connecting the Danube at [Kelheim](/source/Kelheim) with the [Main](/source/Main_(river)) at [Bamberg](/source/Bamberg). The river is also an important source of [hydropower](/source/hydropower) and drinking water.

The Danube river basin is home to such fish species as [pike](/source/Northern_pike), [zander](/source/zander), [huchen](/source/huchen), [wels catfish](/source/wels_catfish), [burbot](/source/burbot) and [tench](/source/tench). It is also home to numerous diverse [carp](/source/carp) and [sturgeon](/source/sturgeon), as well as [salmon](/source/salmon) and [trout](/source/trout). A few species of [euryhaline](/source/euryhaline) fish, such as European [seabass](/source/European_seabass), [mullet](/source/Mullet_(fish)), and [eel](/source/European_eel), inhabit the Danube Delta and the lower portion of the river.

==Names and etymology==
Today the river carries its name from its source confluence in [Donaueschingen](/source/Donaueschingen), Germany, to its discharge into the [Black Sea](/source/Black_Sea) via the [Danube Delta](/source/Danube_Delta) in Romania and Ukraine.

The river was known to the [ancient Greeks](/source/ancient_Greece) as the {{lang|grc-Latn|Istros}} ({{lang|grc|Ἴστρος}})<ref>{{Cite web|url=https://www.perseus.tufts.edu/hopper/text?doc=urn:cts:greekLit:tlg0016.tlg001.perseus-grc1:4.48|title=Herodotus, The Histories, book 4, chapter 48|website=www.perseus.tufts.edu}}</ref> from a root possibly also encountered in the ancient name of the [Dniester](/source/Dniester) ({{lang|la|Danaster}} in Latin, {{lang|grc-Latn|Tiras}} in Greek) and akin to [Iranic](/source/Iranic_languages) {{lang|ira|turos}} 'swift' and [Sanskrit](/source/Sanskrit) {{lang|sa-Latn|iṣiras}} ({{lang|sa|इषिरस्}}) 'swift', from the [PIE](/source/Proto-Indo-European_language) {{lang|ine-x-proto|isro-}}, {{lang|ine-x-proto|sreu}} 'to flow'.<ref name="Felecan & Felecan 2015">{{cite journal |title=Straturi etimologice reflectate în hidronimia românească |first1=Oliviu |last1=Felecan |first2=Nicolae |last2=Felecan |page=254 |journal=Quaderns de Filologia: Estudis Lingüístics |volume=20 |year=2015 |issue=1 |publisher=Universitat de València |doi=10.7203/qfilologia.20.7521 |url=http://roderic.uv.es/bitstream/10550/49693/1/5283423.pdf |doi-access=free }}</ref>

In the Middle Ages, the Greek {{lang|grc-Latn|Tiras}} was borrowed into Italian as {{lang|it|Tyrlo}} and into Turkic languages as {{lang|trk|Tyrla}}; the latter was further borrowed into Romanian as a regionalism ({{lang|ro|Turlă}}).<ref name="Felecan & Felecan 2015"/>

The Thraco-[Phrygian](/source/Phrygian_language) name was {{lang|xpg-Latn|Matoas}},<ref>{{cite journal |title=Matoas, the Thraco-Phrygian name for the Danube, and the IE root *madų |first=Robert |last=Dyer |journal=Glotta |volume=52 |year=1974 |issue=1/2 |pages=91–95 |publisher=Vandenhoeck & Ruprecht (GmbH & Co. KG) |jstor=40266286}}</ref> "the bringer of luck".<ref name="Šašel2009">{{cite book |first=Marjeta |last=Šašel Kos |language=sl, en |url=http://iza.zrc-sazu.si/pdf/Sasel_Kos_Ukrocena_lepotica.pdf |pages=42–50 |chapter=Reka kot božanstvo&nbsp;— Sava v antiki |trans-chapter=River as a Deity&nbsp;– The Sava in Antiquity |editor-first=Jožef |editor-last=Barachini |title=Ukročena lepotica: Sava in njene zgodbe |trans-title=The Tamed Beauty: The Sava and Its Stories |isbn=978-961-92735-0-0 |year=2009 |place=Sevnica |publisher=Javni zavod za kulturo, šport, turizem in mladinske dejavnosti |archive-url=https://web.archive.org/web/20160304041135/http://iza.zrc-sazu.si/pdf/Sasel_Kos_Ukrocena_lepotica.pdf |archive-date=4 March 2016 }}</ref>

The [Middle Mongolian](/source/Middle_Mongol_language) name for the Danube was transliterated as ''Tho-na'' in 1829 by [Jean-Pierre Abel-Rémusat](/source/Jean-Pierre_Abel-R%C3%A9musat).<ref name="Abel-Remusat">{{cite book |last=Abel-Rémusat |first=Jean-Pierre |author-link=Jean-Pierre Abel-Rémusat |title=Nouveaus Mélanges Asiatiques |volume=2 |location=Paris |publisher=Schubart and Heidelhoff |year=1829 |pages=96–97}}</ref>

The modern languages spoken in the Danube basin all use names derived from the [Latin](/source/Latin) name {{lang|la|Danubius}}:

{| class="wikitable sortable" style="border-collapse: collapse;"
!style="text-align:left"|Language
!style="text-align:left"|Name
!style="text-align:left"|Pronunciation ([IPA](/source/International_Phonetic_Alphabet))
!style="text-align:left" data-sort-type=text|Flow sequence{{efn|Flow sequence from the source confluence in [Germany](/source/Germany) to final discharge into the [Black Sea](/source/Black_Sea) via the [Danube Delta](/source/Danube_Delta) in [Romania](/source/Romania) and [Ukraine](/source/Ukraine).<br>See also Contents > Geography.}}

|-
|[Latin](/source/Latin)
|Danubius, Dānuvius
|
|N/A

|-
|[German](/source/German_language)
|Donau
|{{IPA|de|ˈdoːnaʊ|IPA|de-Donau.ogg}}
| 1 [Germany](/source/Germany)<br> 2 [Austria](/source/Austria)

|-
|[Bavarian](/source/Bavarian_language)
|Doana
|
|N/A

|-
|[Silesian](/source/Silesian_language)
|Dōnaj
|
|N/A

|-
|[Upper Sorbian](/source/Upper_Sorbian_language)
|Dunaj
|{{IPA|hsb|ˈdunaj|IPA}}
|N/A

|-
|[Czech](/source/Czech_language)
|Dunaj
|{{IPA|cs|ˈdunaj|IPA}}
|N/A

|-
|[Slovak](/source/Slovak_language)
|Dunaj
|{{IPA|sk|ˈdunaj|IPA}}
| 3 [Slovakia](/source/Slovakia)

|-
|[Polish](/source/Polish_language)
|Dunaj
|{{IPA|pl|ˈdunaj|IPA|pl-Dunaj.ogg}}
|N/A

|-
|[Hungarian](/source/Hungarian_language)
|Duna
|{{IPA|hu|ˈdunɒ|IPA|hu-Duna.ogg}}
| 4 [Hungary](/source/Hungary)

|-
|[Slovenian](/source/Slovene_language)
|Donava
|{{IPA|sl|ˈdóːnaʋa|IPA}}
|N/A

|-
|[Serbo–Croatian](/source/Serbo%E2%80%93Croatian)
|Dunav / Дунав
|{{IPA|sh|dǔna(ː)v|IPA}}
| 5 [Croatia](/source/Croatia)<br>6 [Serbia](/source/Serbia)

|-
|[Macedonian](/source/Macedonian_language)
|Дунав
|{{IPA|mk|ˈdunaf|IPA}}
|N/A

|-
|[Romanian](/source/Romanian_language)
|Dunăre,<br/>definite form Dunărea
|{{IPA|ro|ˈdunəre|IPA}}, {{IPA|ro|ˈdunəre̯a|label=definite form}}<ref name="Vékony">{{Cite book |last=Vékony |first=Gábor |year=2000 |title=Dacians, Romans, Romanians |publisher=Matthias Corvinus Publishing |isbn=978-1-882785-13-1 |page=[https://archive.org/details/daciansromansrom0000veko/page/210 210] |url-access=registration |url=https://archive.org/details/daciansromansrom0000veko/page/210 }}</ref>
|7 [Romania](/source/Romania)<br>9 [Moldova](/source/Moldova)

|-
|[Bulgarian](/source/Bulgarian_language)
|Дунав (Dúnav)
|{{IPA|bg|ˈdunɐf|IPA}}
| 8 [Bulgaria](/source/Bulgaria)

|-
|[Ukrainian](/source/Ukrainian_language)
|Дунай (Dunáy)
|{{IPA|uk|dʊˈnɑj|IPA|LL-Q8798 (ukr)-Tohaomg-Дунай.wav}}
|10 [Ukraine](/source/Ukraine)

|-
|[Greek](/source/Greek_language)
|Δούναβης (Doúnavis)
|{{IPA|el|ˈðunavis|IPA}}
|N/A

|-
|[French](/source/French_language)
|Danube
|{{IPA|fr|danyb|IPA|LL-Q150 (fra)-Jérémy-Günther-Heinz Jähnick-Danube.wav}}
|N/A

|-
|[Italian](/source/Italian_language)
|Danubio
|{{IPA|it|daˈnuːbjo|IPA}}
|N/A

|-
|[Portuguese](/source/Portuguese_language)
|Danúbio
|{{IPA|pt-PT|dɐˈnuβju|IPA}}
|N/A

|-
|[Spanish](/source/Spanish_language)
|Danubio
|{{IPA|es|daˈnuβjo|IPA}}
|N/A

|-
|[Russian](/source/Russian_language)
|Дунай (Dunáy)
|{{IPA|ru|dʊˈnaj|IPA}}
|N/A

|-
|[Turkish](/source/Turkish_language)
|Tuna
|{{IPA|tr|tuˈna|IPA}}
|N/A

|-
|[Romansh](/source/Romansh_language)
|Danubi
|
|N/A

|-
|[Albanian](/source/Albanian_language)
|Danub,<br/>definite form: Danubi<ref>{{citation |page=624 |publisher=[Akademia e Shkencave e RPS te Shqiperise](/source/Akademia_e_Shkencave_e_RPS_te_Shqiperise), [Instituti i Kultures Popullore](/source/Instituti_i_Kultures_Popullore), Sektori i Prozes dhe Poezise |editor1=Kozma Vasili |editor2=Arsen Mustaqi |title=Lirika popullore |trans-title=Folk lyrics |series=Folklor Shqiptar |volume=4 |language=sq |issue=3 – Kenge per nizamet dhe kurbetin |year=1981 |location=Tirana |quote=Tunë-a lumi i Danubit }}</ref>
|
|N/A

|}

===Etymology===
''Danube'' is an [Old European](/source/Old_European_hydronymy) river name derived from the [Celtic](/source/Celtic_languages) '[Danu](/source/Danu_(Irish_goddess))' or '[Don](/source/Dylan_ail_Don)'<ref name="Bromwich">Triad 35. Bromwich, ''Trioedd Ynys Prydein'', pp. 280–285.</ref> (both Celtic gods), which itself derived from the [Proto-Indo-European](/source/Proto-Indo-European_language) {{lang|ine-x-proto|*deh₂nu}}. Other European river names from the same root include the Dunaj, Dzvina/[Daugava](/source/Daugava), [Don](/source/Don_River_(Russia)), [Donets](/source/Donets), [Dnieper](/source/Dnieper), [Dniestr](/source/Dniestr), [Dysna](/source/Dysna) and [Tana/Deatnu](/source/Tana_(Norway)). In [Rigvedic Sanskrit](/source/Rigvedic_Sanskrit), ''danu'' (दनु) means "fluid, dewdrop" and ''danuja (दनु-ज)'' means "born from ''danu''" or "born from dew-drops". In [Avestan](/source/Avestan_language), the same word means "river". The [Finnish](/source/Finnish_language) word for Danube is {{wikt-lang|fi|Tonava}}, which is most likely derived from the name of the river in [German](/source/German_language), {{lang|de|Donau}}. Its [Sámi](/source/Sami_languages) name {{lang|smi|Deatnu}} means "Great River". It is possible that {{lang|xsc|dānu}} in [Scythian](/source/Scythian_language) as in Avestan was a generic word for "river": ''Dnieper'' and ''Dniestr'', from ''Danapris'' and ''Danastius'', are presumed to continue Scythian {{lang|xsc|*dānu apara}} "far river" and {{lang|xsc|*dānu nazdya-}} "near river", respectively.<ref name="Mallory, J.P 2000. p. 106">{{cite book |author-link1=J. P. Mallory |last1=Mallory |first1=J.P |author-link2=Victor H. Mair |first2=Victor H. |last2=Mair |title=The Tarim Mummies: Ancient China and the Mystery of the Earliest Peoples from the West |url=https://archive.org/details/tarimmummiesanci00mall |url-access=registration |location=London |publisher=Thames and Hudson |year=2000 |page=[https://archive.org/details/tarimmummiesanci00mall/page/106 106] |isbn=978-0-500-05101-6 }}. {{cite book |url=http://i.ironau.ru/pdf/osjazfolk1949.pdf |author=V. I. Abaev |script-title=ru:Осетинский язык и фольклор |trans-title=Ossetian language and folklore |location=Moscow |publisher=Publishing house of Soviet Academy of Sciences |year=1949 |page=236 |language=ru }}</ref>

In Latin, the Danube was variously known as {{lang|la|Danubius}}, {{lang|la|Danuvius}}, {{lang|la|Ister}}<ref>{{cite book|title=Ancient Languages of the Balkans, Part One|location=Paris|publisher=Mouton|year=1976|page=144}}</ref> or ''Hister''. The Latin name is masculine, as are all its [Slavic](/source/Slavic_languages) names, except [Slovene](/source/Slovene_language) (the name of the [Rhine](/source/Rhine) is also masculine in Latin, most of the Slavic languages, as well as in German). The German {{lang|de|Donau}} ([Early Modern German](/source/Early_Modern_German) {{lang|de|Donaw}}, {{lang|de|Tonaw}},<ref>{{lang|de|Tonaw}} in {{cite book|author=Sebastian Franck |title=Weltbuch |year=1542 |url=https://books.google.com/books?id=dk9QLBxWmxcC&q=tonach&pg=PT167 |page=81 |author-link=Sebastian Franck}} {{lang|de|Donaw}} e.g. in {{cite book |author=Leonhard Thurneisser zum Thurn |title=Pison |year=1572 |url=https://books.google.com/books?id=PWhWAAAAcAAJ&pg=PR186|page=186}} Spelling {{lang|de|Donau}} from the 17th century.</ref> [Middle High German](/source/Middle_High_German) {{lang|gmh|Tuonowe}})<ref>{{cite book|author=Grimm|title=Deutsche Grammatik|page=[https://archive.org/details/bub_gb_VXTJ_C205t4C/page/n426 407]|title-link=Deutsche Grammatik}}</ref> is feminine, as it has been re-interpreted as containing the suffix ''[-ouwe](/source/Aue_(toponymy))'' "wetland".

[Romanian](/source/Romanian_language) differs from other surrounding languages in designating the river with a feminine term, {{lang|ro|Dunărea}} ({{IPA|ro|ˈdunəre̯a|IPA}}).<ref name="Felecan & Felecan 2015"/> This form was not inherited from Latin, although Romanian is a Romance language.<ref name="Vékony" /> To explain the loss of the Latin name, scholars who suppose that Romanian developed near the large river propose<ref name="Vékony"/> that the Romanian name descends from a hypothetical [Thracian](/source/Thracian_language) {{lang|txh|*Donaris}}. The Proto-Indo-European root of this presumed name is related to the Iranic word "{{lang|ira|don-}}"/"{{lang|ira|dan-}}", while the supposed suffix {{lang|ira|-aris}} is encountered in the ancient name of the [Ialomița River](/source/Ialomi%C8%9Ba_(river)), ''Naparis'', and in the unidentified ''Miliare'' river mentioned by [Jordanes](/source/Jordanes) in his [Getica](/source/Getica).<ref name="Felecan & Felecan 2015"/> Gábor Vékony says that this hypothesis is not plausible, because the Greeks borrowed the ''Istros'' form from the native Thracians.<ref name="Vékony"/> He proposes that the Romanian name is a loanword from a Turkic language ([Cuman](/source/Cuman_language) or [Pecheneg](/source/Pecheneg_language)).<ref name="Vékony"/>

==Geography==
[[File:Danube basin.png|thumb|The [Danube basin](/source/Danube_basin)]]
[[File:Bregquelle 01.jpg|thumb|The hydrogeographical [source of the Danube](/source/source_of_the_Danube) at [St. Martin's Chapel](/source/St._Martin's_Chapel%2C_Furtwangen) in [Furtwangen im Schwarzwald](/source/Furtwangen_im_Schwarzwald) Germany: the ''Bregquelle'', the source of the Danube's longest headstream, the [Breg](/source/Breg_(river)), where the Danube is symbolized by the Roman allegory for the river, ''Danuvius''.]]
[[File:Donauquelle Donaueschingen im Sommer.jpg|thumb|The symbolical source of the Danube in [Donaueschingen](/source/Donaueschingen): the source of the [Donaubach](/source/Donaubach) (''Danube Brook''), which flows into the [Brigach](/source/Brigach).]]

Classified as an [international waterway](/source/international_waterway), it [originates](/source/Source_of_the_Danube) in the town of [Donaueschingen](/source/Donaueschingen), in the [Black Forest](/source/Black_Forest) of [Germany](/source/Germany), at the [confluence](/source/confluence) of the rivers [Brigach](/source/Brigach) and [Breg](/source/Breg_(river)). The Danube then flows southeast for about {{cvt|2730|km}}, passing through four capital cities ([Vienna](/source/Vienna), [Bratislava](/source/Bratislava), [Budapest](/source/Budapest), and [Belgrade](/source/Belgrade)) before emptying into the [Black Sea](/source/Black_Sea) via the [Danube Delta](/source/Danube_Delta) in [Romania](/source/Romania) and [Ukraine](/source/Ukraine).

===International status===
Once a long-standing frontier of the [Roman Empire](/source/Roman_Empire), the river passes through or touches the borders of 10 countries. Its [drainage basin](/source/drainage_basin) extends into nine more (ten if [Kosovo](/source/Kosovo) is included).<ref name=icpdr>{{cite web|url=http://www.icpdr.org/icpdr-pages/countries.htm|title=Countries of the Danube River Basin|publisher=International Commission for the protection of the Danube River|access-date=13 November 2010}}</ref>

{| class="wikitable sortable" style="border-collapse: collapse;
!style="text-align:left"|Flow<br>seq.
!style="text-align:left"|Country
!style="text-align:left"|Basin<br>area<ref name=icpdr/>
!style="text-align:left"|Local<br>name
!style="text-align:left"|Points of interest

|-
|style="text-align:center"|1
|[Germany](/source/Germany)
|style="text-align:right"|7%
| rowspan="2" |[Donau](/source/%3Ade%3ADonau)
|[Donaueschingen](/source/Donaueschingen) – source

|-
|style="text-align:center"|2
|[Austria](/source/Austria)
|style="text-align:right"|10%
|[Vienna](/source/Vienna) – capital

|-
|style="text-align:center"|3
|[Slovakia](/source/Slovakia)
|style="text-align:right"|5.9%
|[Dunaj](/source/%3Ask%3ADunaj)
|[Bratislava](/source/Bratislava) – capital

|-
|style="text-align:center"|4
|[Hungary](/source/Hungary)
|style="text-align:right"|11.6%
|[Duna](/source/%3Ahu%3ADuna)
|[Budapest](/source/Budapest) – capital

|-
|style="text-align:center"|5
|[Croatia](/source/Croatia)
|style="text-align:right"|4.4%
| rowspan="2" |Dunav
|
|-
|style="text-align:center"|6
|[Serbia](/source/Serbia)
|style="text-align:right"|10.2%
|[Belgrade](/source/Belgrade) – capital

|-
|style="text-align:center"|7
|[Romania](/source/Romania)
|style="text-align:right"|29%
|[Dunărea](/source/%3Aro%3ADun%C4%83rea)
|[Danube Delta](/source/Danube_Delta) – [Black Sea](/source/Black_Sea)

|-
|style="text-align:center"|8
|[Bulgaria](/source/Bulgaria){{efn|name="sequence_8"|Note that the port city of [Vidin](/source/Vidin) in Bulgaria is downstream from the town of [Moldova Nouă](/source/Moldova_Nou%C4%83) in Romania.}}
|style="text-align:right"|5.9%
|[Дунав](/source/%3Abg%3A%D0%94%D1%83%D0%BD%D0%B0%D0%B2)
|
|-
|style="text-align:center"|9
|[Moldova](/source/Moldova)
|style="text-align:right"|1.6%
|Dunărea
|
|-
|style="text-align:center"|10
|[Ukraine](/source/Ukraine)
|style="text-align:right"|3.8%
|[Дунай](/source/%3Auk%3A%D0%94%D1%83%D0%BD%D0%B0%D0%B9)
|[Danube Delta](/source/Danube_Delta) – [Black Sea](/source/Black_Sea)

|}

===Drainage basin===
In addition to the bordering countries (see above), the [drainage basin](/source/drainage_basin) includes parts of nine more countries: [Bosnia and Herzegovina](/source/Bosnia_and_Herzegovina) (4.6% of the basin area), the [Czech Republic](/source/Czech_Republic) (2.9%), [Slovenia](/source/Slovenia) (2.0%), [Montenegro](/source/Montenegro) (0.9%), [Switzerland](/source/Switzerland) (0.2%), [Italy](/source/Italy) (<0.15%), [Poland](/source/Poland) (<0.1%), [North Macedonia](/source/North_Macedonia) (<0.1%) and [Albania](/source/Albania) (<0.1%).<ref name=icpdr /> The total drainage basin is {{convert|801463|km2|abbr=on}} in area,{{GeoQuelle|DE-BY|GV}}{{GeoSource|Danube||12}} and is home to 83 million people.<ref name="ICPDR-Basin"/> The highest point of the drainage basin is the summit of ''[Piz Bernina](/source/Piz_Bernina)'' at the [Italy–Switzerland border](/source/Italy%E2%80%93Switzerland_border), at {{convert|4049|m|sp=us|abbr=on}}.<ref>{{cite book|url=http://www.unece.org/fileadmin//DAM/env/water/publications/pub76.htm|title=Our Waters: Joining Hands Across Borders. First Assessment of Transboundary Rivers, Lakes and Groundwaters|year=2007|chapter=Drainage basin of the Black Sea |chapter-url=http://www.unece.org/fileadmin/DAM/env/water/blanks/assessment/black.pdf|publisher=[United Nations Economic Commission for Europe](/source/United_Nations_Economic_Commission_for_Europe)}}</ref> The Danube river basin is divided into three main parts, separated by "gates" where the river is forced to cut through mountainous sections:<ref name="ICPDR-Basin">{{Cite web|url=https://www.icpdr.org/main/danube-basin/river-basin|title=River Basin &#124; ICPDR – International Commission for the Protection of the Danube River|website=www.icpdr.org}}</ref>
* '''Upper Basin''', from the [headwaters](/source/headwaters) to the [Devín Gate](/source/Dev%C3%ADn_Gate). 
* '''Middle Basin''', usually called the [Pannonian basin](/source/Pannonian_basin) or Carpathian Basin, between the [Devín Gate](/source/Dev%C3%ADn_Gate) and the [Iron Gates](/source/Iron_Gates). It includes the Hungarian plains [Kisalföld](/source/Kisalf%C3%B6ld) and [Alföld](/source/Alf%C3%B6ld).
* '''Lower Basin''', from the [Iron Gates](/source/Iron_Gates) to the [river mouth](/source/river_mouth), including the [Danube Delta](/source/Danube_Delta).

==Discharge==

{| class="wikitable mw-collapsible mw-collapsed" style="text-align:center;"
|+{{nowrap|Mean annual discharge on the hydrological stations (period from 2000 to 2025)}}
! rowspan="2" |Year 
! colspan="7" |Mean annual discharge in m<sup>3</sup>/s (cu ft/s)
|-
![Reni](/source/Reni%2C_Ukraine)<br/>[Isaccea](/source/Isaccea)
![Silistra](/source/Silistra)
![Pristol](/source/Pristol)
![Batina](/source/Batina)<br/>[Bezdan](/source/Bezdan)
![Nagymaros](/source/Nagymaros) [Szob](/source/Szob)
![Bratislava](/source/Bratislava)<br/>[Wolfsthal](/source/Wolfsthal)
![Untergries-bach](/source/Untergriesbach)
|-
|2000
|{{convert|6,580.6|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,198.1|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,585.9|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,669.4|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,627.2|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,337.9|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,667.2|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2001
|{{convert|6,304.3|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,919.4|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,421.8|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,432.5|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,382.3|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,231.3|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,627.6|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2002
|{{convert|6,837.1|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,100.1|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,392|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,824.9|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,855.6|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,683|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,803.9|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2003
|{{convert|5,021|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,571|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|3,825|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,786|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,722|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,647|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,153|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2004
|{{convert|6,524|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,088|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,233|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,025|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,013|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,852|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,213|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2005
|{{convert|8,711|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|7,659|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,396|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,420|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,329|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,115|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,359|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2006
|{{convert|8,428|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|7,370|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,616|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,110|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,503|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,186|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,396|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2007
|{{convert|5,626|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,195|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,512|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,182|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,136|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,916|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,287|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2008
|{{convert|5,909|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,358|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,736|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,163|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,079|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,876|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,339|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2009
|{{convert|6,492|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,990|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,412|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,607|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,441|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,186|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,433|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2010
|{{convert|9,598|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|8,515|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|7,424|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,879|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,615|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,130|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,420|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2011
|{{convert|5,303|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,827|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,182|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,000|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,882|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,700|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,218|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2012
|{{convert|5,053|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,665|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,321|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,240|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,216|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,120|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,517|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2013
|{{convert|7,164|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,558|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,946|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,863|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,684|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,417|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,671|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2014
|{{convert|7,446|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,901|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,756|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,198|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,036|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,788|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,237|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2015
|{{convert|6,138|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,722|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,971|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,030|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,903|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,629|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,240|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2016
|{{convert|6,465|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,993|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,339|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,261|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,196|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,944|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,412|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2017
|{{convert|5,202|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,813|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,270|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,143|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,041|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,844|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,307|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2018
|{{convert|6,487.8|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,875.5|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,891|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,906.3|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,808.1|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,644.1|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,227.8|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2019
|{{convert|5,579|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,168|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,593|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,253|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,114|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,962|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,446|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2020
|{{convert|4,893.5|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,659|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,095|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,215|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,026|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,841|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,285|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2021
|{{convert|5,998|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,505|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,696|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,178|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,028|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,838|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,304|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2022
|{{convert|4,373|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|4,107|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|3,633|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,180|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,751|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,557|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,134|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2023
|{{convert|6,665|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|6,267|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|5,534|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,240|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|2,264|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,968|m3/s|cuft/s|sortable=on|abbr=values}}
|{{convert|1,443|m3/s|cuft/s|sortable=on|abbr=values}}
|-
|2024
|{{convert|5,776.4|m3/s|cuft/s|sortable=on|abbr=values}}
|
|
|{{convert|2,690|m3/s|cuft/s|sortable=on|abbr=values}}
|
|
|
|-
|2025
|{{convert|4,091.4|m3/s|cuft/s|sortable=on|abbr=values}}
|
|
|
|
|
|
|-
| colspan="8" |Source:<ref name="ICPDR"/><ref name="Republički hidrometeorološki zavod">{{cite web|url=https://www.hidmet.gov.rs|title=Republički hidrometeorološki zavod}}</ref><ref name="ICPDR-International Commission for the Protection of the Danube River">{{cite web|url=https://www.icpdr.org/library/publications?f%5B0%5D=category%3A233|title=ICPDR-International Commission for the Protection of the Danube River}}</ref><ref name="DIAGNOZA ŞI PROGNOZA PENTRU DUNĂRE">{{cite web|url=https://www.hidro.ro/bulletin_type/diagnoza-si-prognoza-pentru-dunare|title=DIAGNOZA ŞI PROGNOZA PENTRU DUNĂRE}}</ref><ref name="TNMN Yearbooks">{{cite report|url=https://www.icpdr.org/library/publications/tnmn-yearbooks|title=TNMN Yearbooks|docket=Water Quality in the Danube River Basin|last=Igor|first=Liska|publisher=International Commission for the Protection of the Danube River (ICPDR)|location=Vienna (Austria)|website=www.icpdr.org}}</ref>
|}

{| class="wikitable mw-collapsible mw-collapsed" style="text-align:center;"
|+{{nowrap|Multiannual average, minimum and maximum discharge (water period from 1876 to 2010)}}
! rowspan="2" |Station 
! colspan="3" |Discharge (m<sup>3</sup>/s)
! colspan="3" |Discharge (cu ft/s)
|-
!Min
!Mean
!Max
!Min
!Mean
!Max
|-
|[Ceatal Izmail](/source/Izmail)
|1,889
|6,489
|14,673
|{{convert|1,889|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|6,489|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|14,673|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Reni](/source/Reni%2C_Ukraine), [Isaccea](/source/Isaccea)
|1,805
|6,564
|14,820
|{{convert|1,805|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|6,564|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|14,820|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Zimnicea](/source/Zimnicea), [Svishtov](/source/Svishtov)
|1,411
|6,018
|14,510
|{{convert|1,411|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|6,018|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|14,510|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Orșova](/source/Or%C8%99ova)
|1,672
|5,572
|13,324
|{{convert|1,672|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|5,572|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|13,324|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Veliko Gradište](/source/Veliko_Gradi%C5%A1te)
|1,461
|5,550
|14,152
|{{convert|1,461|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|5,550|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|14,152|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Pančevo](/source/Pan%C4%8Devo)
|1,454
|5,310
|13,080
|{{convert|1,454|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|5,310|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|13,080|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Bogojevo](/source/Bogojevo)
|959
|2,889
|8,153
|{{convert|959|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|2,889|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|8,153|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Bezdan](/source/Bezdan), [Batina](/source/Batina)
|749
|2,353
|7,043
|{{convert|749|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|2,353|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|7,043|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Mohács](/source/Moh%C3%A1cs)
|667
|2,336
|7,227
|{{convert|667|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|2,336|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|7,227|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Nagymaros](/source/Nagymaros), [Szob](/source/Szob)
|628
|2,333
|7,057
|{{convert|628|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|2,333|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|7,057|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Bratislava](/source/Bratislava)
|633
|2,059
|7,324
|{{convert|633|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|2,059|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|7,324|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Vienna](/source/Vienna)
|506
|1,917
|6,062
|{{convert|506|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|1,917|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|6,062|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Krems an der Donau](/source/Krems_an_der_Donau)
|596
|1,845
|5,986
|{{convert|596|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|1,845|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|5,986|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Linz](/source/Linz)
|468
|1,451
|4,783
|{{convert|468|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|1,451|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|4,783|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Hofkirchen](/source/Hofkirchen%2C_Bavaria)
|211
|638
|1,943
|{{convert|211|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|638|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|1,943|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Regensburg](/source/Regensburg)
|128
|444
|1,330
|{{convert|128|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|444|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|1,330|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Ingolstadt](/source/Ingolstadt)
|83
|312
|965
|{{convert|83|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|312|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|965|m3/s|cuft/s|sortable=on|disp=number}}
|-
|[Ulm](/source/Ulm)
|6
|38
|153
|{{convert|6|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|38|m3/s|cuft/s|sortable=on|disp=number}}
|{{convert|153|m3/s|cuft/s|sortable=on|disp=number}}
|-
| colspan="7" |Source:<ref name="Flood Regime of Rivers in the Danube River Basin">{{cite book|title=Flood Regime of Rivers in the Danube River Basin|year=2019 |doi=10.31577/2019.9788089139460 |last1=Pekárová |first1=Pavla |last2=Miklánek |first2=Pavol |isbn=978-80-89139-46-0 |s2cid=131234947 }}</ref><ref name="auto"/>
|}
{| class="wikitable mw-collapsible mw-collapsed" style="text-align:center;"
|+{{nowrap|Simulated water and suspended sediment results from climate-driven decadal study (with [STD](/source/Standard_deviation) through specific decade)}}
 !rowspan=2|Period ([CE](/source/Common_Era))
 !rowspan=2|Scenario
 !colspan=2|P
 !colspan=2|T
 !colspan=2|Q
 !colspan=2|S
 |-
 !mm
 !in
 !°C
 !°F
 !m<sup>3</sup>/s
 !cu ft/s
 !metric tons<br />(millions)
 !short tons<br />(millions)
 |-
 | colspan="10" |'''[LIA](/source/Little_Ice_Age)'''
 |-
 |1530–1540
 |Cool/dry
 |{{convert|794|mm|in|disp=table|sortable=on}}
 |{{convert|9.0|C|F|disp=table|sortable=on}}
 |{{convert|6,207|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|72.9|t|ST|disp=table|sortable=on}}
 |-
 |1650–1660
 |Cool/wet
 |{{convert|885|mm|in|disp=table|sortable=on}}
 |{{convert|8.4|C|F|disp=table|sortable=on}}
 |{{convert|7,929|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|67.3|t|ST|disp=table|sortable=on}}
 |-
 |1709–1719
 |Warm/wet
 |{{convert|861|mm|in|disp=table|sortable=on}}
 |{{convert|8.3|C|F|disp=table|sortable=on}}
 |{{convert|7,616|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|52.9|t|ST|disp=table|sortable=on}}
 |-
 |1770–1780
 |Warm/dry
 |{{convert|865|mm|in|disp=table|sortable=on}}
 |{{convert|8.9|C|F|disp=table|sortable=on}}
 |{{convert|7,728|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|74.1|t|ST|disp=table|sortable=on}}
 |-
 | colspan="10" |'''[Modern](/source/Modern_era)'''
 |-
 |1940–1950
 |Cool/dry
 |{{convert|778|mm|in|disp=table|sortable=on}}
 |{{convert|8.9|C|F|disp=table|sortable=on}}
 |{{convert|7,209|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|55.0|t|ST|disp=table|sortable=on}}
 |-
 |1960–1970
 |Cool/wet
 |{{convert|850|mm|in|disp=table|sortable=on}}
 |{{convert|8.8|C|F|disp=table|sortable=on}}
 |{{convert|7,399|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|73.0|t|ST|disp=table|sortable=on}}
 |-
 |1975–1985
 |Warm/wet
 |{{convert|818|mm|in|disp=table|sortable=on}}
 |{{convert|9.0|C|F|disp=table|sortable=on}}
 |{{convert|7,186|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|77.8|t|ST|disp=table|sortable=on}}
 |-
 |1990–2000
 |Warm/dry
 |{{convert|790|mm|in|disp=table|sortable=on}}
 |{{convert|9.5|C|F|disp=table|sortable=on}}
 |{{convert|5,068|m3/s|cuft/s|disp=table|sortable=on}}
 |{{convert|73.8|t|ST|disp=table|sortable=on}}
|-
| colspan="10" |'''P''' – Simulated average [precipitation](/source/precipitation) in the Danube basin; '''T''' – Simulated average [temperature](/source/temperature) in the Danube basin; '''Q''' – Simulated average [discharge](/source/Discharge_(hydrology)) in the river Danube at delta; '''S''' – Simulated [sediment load](/source/Stream_load) in the river Danube at [delta](/source/Danube_Delta);
|-
| colspan="10" |Source:<ref>{{cite journal|title=Simulating fluvial fluxes in the Danube watershed: The "Little Ice Age" versus modern day|date=2021|doi=10.1177/0959683611409778 |last1=McCarney-Castle |first1=K. |last2=Voulgaris |first2=G. |last3=Kettner |first3=A.J. |last4=Giosan |first4=L. |journal=The Holocene |volume=22 |pages=91–105 |s2cid=129864432 }}</ref>
|}

===Discharge chronology===
{| class="wikitable mw-collapsible mw-collapsed" style="text-align:center;"
|+{{nowrap|Historical average flow to the present day; Measured and reconstructed average water flows from 1742.
The reconstructed and observed streamflow (Q – m<sup>3</sup>/s) at [Ceatal Izmail](/source/Izmail) for the 1742 to 2025.}}
 !Year
 !m<sup>3</sup>/s
 !cu ft/s
!
!Year
 !m<sup>3</sup>/s
 !cu ft/s
!
!Year
 !m<sup>3</sup>/s
 !cu ft/s
!
!Year
 !m<sup>3</sup>/s
 !cu ft/s
!
!Year
 !m<sup>3</sup>/s
 !cu ft/s
!
!Year
 !m<sup>3</sup>/s
 !cu ft/s
|-
| colspan="23" |''Reconstructed''
|-
|1742
|{{convert|5,780|m3/s|cuft/s|disp=table}}
| rowspan="33" |
|1751
|{{convert|6,760|m3/s|cuft/s|disp=table}}
| rowspan="33" |
|1761
|{{convert|6,470|m3/s|cuft/s|disp=table}}
| rowspan="33" |
|1771
|{{convert|9,700|m3/s|cuft/s|disp=table}}
| rowspan="33" |
|1781
|{{convert|5,830|m3/s|cuft/s|disp=table}}
| rowspan="33" |
|1791
|{{convert|5,540|m3/s|cuft/s|disp=table}}
|-
|1743
|{{convert|5,355|m3/s|cuft/s|disp=table}}
|1752
|{{convert|7,090|m3/s|cuft/s|disp=table}}
|1762
|{{convert|6,510|m3/s|cuft/s|disp=table}}
|1772
|{{convert|6,050|m3/s|cuft/s|disp=table}}
|1782
|{{convert|6,470|m3/s|cuft/s|disp=table}}
|1792
|{{convert|6,930|m3/s|cuft/s|disp=table}}
|-
|1744
|{{convert|5,370|m3/s|cuft/s|disp=table}}
|1753
|{{convert|4,980|m3/s|cuft/s|disp=table}}
|1763
|{{convert|5,950|m3/s|cuft/s|disp=table}}
|1773
|{{convert|4,600|m3/s|cuft/s|disp=table}}
|1783
|{{convert|7,930|m3/s|cuft/s|disp=table}}
|1793
|{{convert|7,800|m3/s|cuft/s|disp=table}}
|-
|1745
|{{convert|4,940|m3/s|cuft/s|disp=table}}
|1754
|{{convert|6,330|m3/s|cuft/s|disp=table}}
|1764
|{{convert|6,280|m3/s|cuft/s|disp=table}}
|1774
|{{convert|6,150|m3/s|cuft/s|disp=table}}
|1784
|{{convert|8,400|m3/s|cuft/s|disp=table}}
|1794
|{{convert|5,230|m3/s|cuft/s|disp=table}}
|-
|1746
|{{convert|7,140|m3/s|cuft/s|disp=table}}
|1755
|{{convert|6,840|m3/s|cuft/s|disp=table}}
|1765
|{{convert|6,130|m3/s|cuft/s|disp=table}}
|1775
|{{convert|6,060|m3/s|cuft/s|disp=table}}
|1785
|{{convert|7,610|m3/s|cuft/s|disp=table}}
|1795
|{{convert|6,530|m3/s|cuft/s|disp=table}}
|-
|1747
|{{convert|5,850|m3/s|cuft/s|disp=table}}
|1756
|{{convert|6,370|m3/s|cuft/s|disp=table}}
|1766
|{{convert|8,530|m3/s|cuft/s|disp=table}}
|1776
|{{convert|6,320|m3/s|cuft/s|disp=table}}
|1786
|{{convert|6,570|m3/s|cuft/s|disp=table}}
|1796
|{{convert|6,460|m3/s|cuft/s|disp=table}}
|-
|1748
|{{convert|6,840|m3/s|cuft/s|disp=table}}
|1757
|{{convert|6,830|m3/s|cuft/s|disp=table}}
|1767
|{{convert|6,850|m3/s|cuft/s|disp=table}}
|1777
|{{convert|5,530|m3/s|cuft/s|disp=table}}
|1787
|{{convert|6,980|m3/s|cuft/s|disp=table}}
|1797
|{{convert|6,700|m3/s|cuft/s|disp=table}}
|-
|1749
|{{convert|6,690|m3/s|cuft/s|disp=table}}
|1758
|{{convert|8,410|m3/s|cuft/s|disp=table}}
|1768
|{{convert|8,400|m3/s|cuft/s|disp=table}}
|1778
|{{convert|7,470|m3/s|cuft/s|disp=table}}
|1788
|{{convert|5,860|m3/s|cuft/s|disp=table}}
|1798
|{{convert|6,560|m3/s|cuft/s|disp=table}}
|-
|1750
|{{convert|5,180|m3/s|cuft/s|disp=table}}
|1759
|{{convert|5,520|m3/s|cuft/s|disp=table}}
|1769
|{{convert|5,720|m3/s|cuft/s|disp=table}}
|1779
|{{convert|6,600|m3/s|cuft/s|disp=table}}
|1789
|{{convert|7,190|m3/s|cuft/s|disp=table}}
|1799
|{{convert|9,590|m3/s|cuft/s|disp=table}}
|-
| colspan="3" |
|1760
|{{convert|6,840|m3/s|cuft/s|disp=table}}
|1770
|{{convert|10,700|m3/s|cuft/s|disp=table}}
|1780
|{{convert|6,990|m3/s|cuft/s|disp=table}}
|1790
|{{convert|6,940|m3/s|cuft/s|disp=table}}
|1800
|{{convert|6,150|m3/s|cuft/s|disp=table}}
|-
| colspan="3" |'''{{convert|5,905|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,597|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|7,154|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,547|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,978|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,749|m3/s|cuft/s|abbr=values}}'''
|-
|1801
|{{convert|7,310|m3/s|cuft/s|disp=table}}
|1811
|{{convert|8,220|m3/s|cuft/s|disp=table}}
|1821
|{{convert|6,390|m3/s|cuft/s|disp=table}}
|1831
|{{convert|6,670|m3/s|cuft/s|disp=table}}
|1841
|{{convert|6,210|m3/s|cuft/s|disp=table}}
|1851
|{{convert|7,350|m3/s|cuft/s|disp=table}}
|-
|1802
|{{convert|6,590|m3/s|cuft/s|disp=table}}
|1812
|{{convert|5,230|m3/s|cuft/s|disp=table}}
|1822
|{{convert|5,700|m3/s|cuft/s|disp=table}}
|1832
|{{convert|4,820|m3/s|cuft/s|disp=table}}
|1842
|{{convert|5,340|m3/s|cuft/s|disp=table}}
|1852
|{{convert|6,550|m3/s|cuft/s|disp=table}}
|-
|1803
|{{convert|6,870|m3/s|cuft/s|disp=table}}
|1813
|{{convert|6,680|m3/s|cuft/s|disp=table}}
|1823
|{{convert|6,520|m3/s|cuft/s|disp=table}}
|1833
|{{convert|5,350|m3/s|cuft/s|disp=table}}
|1843
|{{convert|6,710|m3/s|cuft/s|disp=table}}
|1853
|{{convert|7,800|m3/s|cuft/s|disp=table}}
|-
|1804
|{{convert|6,220|m3/s|cuft/s|disp=table}}
|1814
|{{convert|7,290|m3/s|cuft/s|disp=table}}
|1824
|{{convert|6,420|m3/s|cuft/s|disp=table}}
|1834
|{{convert|6,470|m3/s|cuft/s|disp=table}}
|1844
|{{convert|6,960|m3/s|cuft/s|disp=table}}
|1854
|{{convert|5,060|m3/s|cuft/s|disp=table}}
|-
|1805
|{{convert|7,010|m3/s|cuft/s|disp=table}}
|1815
|{{convert|6,640|m3/s|cuft/s|disp=table}}
|1825
|{{convert|8,040|m3/s|cuft/s|disp=table}}
|1835
|{{convert|7,040|m3/s|cuft/s|disp=table}}
|1845
|{{convert|7,440|m3/s|cuft/s|disp=table}}
|1855
|{{convert|7,020|m3/s|cuft/s|disp=table}}
|-
|1806
|{{convert|6,830|m3/s|cuft/s|disp=table}}
|1816
|{{convert|8,090|m3/s|cuft/s|disp=table}}
|1826
|{{convert|5,800|m3/s|cuft/s|disp=table}}
|1836
|{{convert|9,740|m3/s|cuft/s|disp=table}}
|1846
|{{convert|6,750|m3/s|cuft/s|disp=table}}
|1856
|{{convert|5,390|m3/s|cuft/s|disp=table}}
|-
|1807
|{{convert|7,000|m3/s|cuft/s|disp=table}}
|1817
|{{convert|8,650|m3/s|cuft/s|disp=table}}
|1827
|{{convert|6,650|m3/s|cuft/s|disp=table}}
|1837
|{{convert|6,770|m3/s|cuft/s|disp=table}}
|1847
|{{convert|7,070|m3/s|cuft/s|disp=table}}
|1857
|{{convert|4,880|m3/s|cuft/s|disp=table}}
|-
|1808
|{{convert|5,600|m3/s|cuft/s|disp=table}}
|1818
|{{convert|6,920|m3/s|cuft/s|disp=table}}
|1828
|{{convert|8,140|m3/s|cuft/s|disp=table}}
|1838
|{{convert|10,440|m3/s|cuft/s|disp=table}}
|1848
|{{convert|5,620|m3/s|cuft/s|disp=table}}
|1858
|{{convert|5,580|m3/s|cuft/s|disp=table}}
|-
|1809
|{{convert|7,150|m3/s|cuft/s|disp=table}}
|1819
|{{convert|6,470|m3/s|cuft/s|disp=table}}
|1829
|{{convert|8,280|m3/s|cuft/s|disp=table}}
|1839
|{{convert|9,960|m3/s|cuft/s|disp=table}}
|1849
|{{convert|5,360|m3/s|cuft/s|disp=table}}
|1859
|{{convert|5,630|m3/s|cuft/s|disp=table}}
|-
|1810
|{{convert|8,430|m3/s|cuft/s|disp=table}}
|1820
|{{convert|6,560|m3/s|cuft/s|disp=table}}
|1830
|{{convert|7,790|m3/s|cuft/s|disp=table}}
|1840
|{{convert|5,560|m3/s|cuft/s|disp=table}}
|1850
|{{convert|7,360|m3/s|cuft/s|disp=table}}
|1860
|{{convert|7,220|m3/s|cuft/s|disp=table}}
|-
| colspan="3" |'''{{convert|6,901|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|7,075|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,973|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|7,282|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,482|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,248|m3/s|cuft/s|abbr=values}}'''
|-
|1861
|{{convert|5,980|m3/s|cuft/s|disp=table}}
|1871
|{{convert|8,860|m3/s|cuft/s|disp=table}}
|1881
|{{convert|8,320|m3/s|cuft/s|disp=table}}
|1891
|{{convert|5,440|m3/s|cuft/s|disp=table}}
|1901
|{{convert|5,570|m3/s|cuft/s|disp=table}}
|1911
|{{convert|5,120|m3/s|cuft/s|disp=table}}
|-
|1862
|{{convert|5,040|m3/s|cuft/s|disp=table}}
|1872
|{{convert|5,970|m3/s|cuft/s|disp=table}}
|1882
|{{convert|5,130|m3/s|cuft/s|disp=table}}
|1892
|{{convert|5,620|m3/s|cuft/s|disp=table}}
|1902
|{{convert|5,650|m3/s|cuft/s|disp=table}}
|1912
|{{convert|6,940|m3/s|cuft/s|disp=table}}
|-
|1863
|{{convert|3,340|m3/s|cuft/s|disp=table}}
|1873
|{{convert|5,150|m3/s|cuft/s|disp=table}}
|1883
|{{convert|7,590|m3/s|cuft/s|disp=table}}
|1893
|{{convert|5,710|m3/s|cuft/s|disp=table}}
|1903
|{{convert|5,490|m3/s|cuft/s|disp=table}}
|1913
|{{convert|6,410|m3/s|cuft/s|disp=table}}
|-
|1864
|{{convert|6,150|m3/s|cuft/s|disp=table}}
|1874
|{{convert|4,680|m3/s|cuft/s|disp=table}}
|1884
|{{convert|5,250|m3/s|cuft/s|disp=table}}
|1894
|{{convert|4,770|m3/s|cuft/s|disp=table}}
|1904
|{{convert|4,940|m3/s|cuft/s|disp=table}}
|1914
|{{convert|6,560|m3/s|cuft/s|disp=table}}
|-
|1865
|{{convert|5,690|m3/s|cuft/s|disp=table}}
|1875
|{{convert|5,360|m3/s|cuft/s|disp=table}}
|1885
|{{convert|5,430|m3/s|cuft/s|disp=table}}
|1895
|{{convert|6,240|m3/s|cuft/s|disp=table}}
|1905
|{{convert|6,100|m3/s|cuft/s|disp=table}}
|1915
|{{convert|9,540|m3/s|cuft/s|disp=table}}
|-
|1866
|{{convert|3,780|m3/s|cuft/s|disp=table}}
|1876
|{{convert|7,520|m3/s|cuft/s|disp=table}}
|1886
|{{convert|5,660|m3/s|cuft/s|disp=table}}
|1896
|{{convert|6,470|m3/s|cuft/s|disp=table}}
|1906
|{{convert|6,190|m3/s|cuft/s|disp=table}}
|1916
|{{convert|7,550|m3/s|cuft/s|disp=table}}
|-
|1867
|{{convert|6,350|m3/s|cuft/s|disp=table}}
|1877
|{{convert|6,660|m3/s|cuft/s|disp=table}}
|1887
|{{convert|5,340|m3/s|cuft/s|disp=table}}
|1897
|{{convert|7,700|m3/s|cuft/s|disp=table}}
|1907
|{{convert|6,770|m3/s|cuft/s|disp=table}}
|1917
|{{convert|6,410|m3/s|cuft/s|disp=table}}
|-
|1868
|{{convert|5,660|m3/s|cuft/s|disp=table}}
|1878
|{{convert|7,040|m3/s|cuft/s|disp=table}}
|1888
|{{convert|6,800|m3/s|cuft/s|disp=table}}
|1898
|{{convert|4,550|m3/s|cuft/s|disp=table}}
|1908
|{{convert|4,400|m3/s|cuft/s|disp=table}}
|1918
|{{convert|4,300|m3/s|cuft/s|disp=table}}
|-
|1869
|{{convert|5,370|m3/s|cuft/s|disp=table}}
|1879
|{{convert|8,300|m3/s|cuft/s|disp=table}}
|1889
|{{convert|6,530|m3/s|cuft/s|disp=table}}
|1899
|{{convert|4,500|m3/s|cuft/s|disp=table}}
|1909
|{{convert|5,590|m3/s|cuft/s|disp=table}}
|1919
|{{convert|7,410|m3/s|cuft/s|disp=table}}
|-
|1870
|{{convert|7,470|m3/s|cuft/s|disp=table}}
|1880
|{{convert|5,660|m3/s|cuft/s|disp=table}}
|1890
|{{convert|4,650|m3/s|cuft/s|disp=table}}
|1900
|{{convert|6,900|m3/s|cuft/s|disp=table}}
|1910
|{{convert|7,450|m3/s|cuft/s|disp=table}}
|1920
|{{convert|6,720|m3/s|cuft/s|disp=table}}
|-
| colspan="3" |'''{{convert|5,483|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,520|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,070|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|5,790|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|5,815|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,770|m3/s|cuft/s|abbr=values}}'''
|-
| colspan="23" |''Observed''
|-
|1921
|{{convert|3,906|m3/s|cuft/s|disp=table}}
| rowspan="22" |
|1931
|{{convert|6,706|m3/s|cuft/s|disp=table}}
| rowspan="22" |
|1941
|{{convert|9,916|m3/s|cuft/s|disp=table}}
| rowspan="22" |
|1951
|{{convert|6,368|m3/s|cuft/s|disp=table}}
| rowspan="22" |
|1961
|{{convert|5,860|m3/s|cuft/s|disp=table}}
| rowspan="22" |
|1971
|{{convert|5,272|m3/s|cuft/s|disp=table}}
|-
|1922
|{{convert|6,530|m3/s|cuft/s|disp=table}}
|1932
|{{convert|6,181|m3/s|cuft/s|disp=table}}
|1942
|{{convert|7,266|m3/s|cuft/s|disp=table}}
|1952
|{{convert|5,850|m3/s|cuft/s|disp=table}}
|1962
|{{convert|6,628|m3/s|cuft/s|disp=table}}
|1972
|{{convert|6,160|m3/s|cuft/s|disp=table}}
|-
|1923
|{{convert|6,430|m3/s|cuft/s|disp=table}}
|1933
|{{convert|6,344|m3/s|cuft/s|disp=table}}
|1943
|{{convert|4,308|m3/s|cuft/s|disp=table}}
|1953
|{{convert|6,117|m3/s|cuft/s|disp=table}}
|1963
|{{convert|6,047|m3/s|cuft/s|disp=table}}
|1973
|{{convert|5,766|m3/s|cuft/s|disp=table}}
|-
|1924
|{{convert|6,700|m3/s|cuft/s|disp=table}}
|1934
|{{convert|5,644|m3/s|cuft/s|disp=table}}
|1944
|{{convert|7,190|m3/s|cuft/s|disp=table}}
|1954
|{{convert|6,168|m3/s|cuft/s|disp=table}}
|1964
|{{convert|5,259|m3/s|cuft/s|disp=table}}
|1974
|{{convert|7,258|m3/s|cuft/s|disp=table}}
|-
|1925
|{{convert|5,255|m3/s|cuft/s|disp=table}}
|1935
|{{convert|5,718|m3/s|cuft/s|disp=table}}
|1945
|{{convert|5,870|m3/s|cuft/s|disp=table}}
|1955
|{{convert|8,834|m3/s|cuft/s|disp=table}}
|1965
|{{convert|8,400|m3/s|cuft/s|disp=table}}
|1975
|{{convert|7,190|m3/s|cuft/s|disp=table}}
|-
|1926
|{{convert|8,144|m3/s|cuft/s|disp=table}}
|1936
|{{convert|6,392|m3/s|cuft/s|disp=table}}
|1946
|{{convert|4,684|m3/s|cuft/s|disp=table}}
|1956
|{{convert|7,100|m3/s|cuft/s|disp=table}}
|1966
|{{convert|7,954|m3/s|cuft/s|disp=table}}
|1976
|{{convert|6,567|m3/s|cuft/s|disp=table}}
|-
|1927
|{{convert|5,990|m3/s|cuft/s|disp=table}}
|1937
|{{convert|8,325|m3/s|cuft/s|disp=table}}
|1947
|{{convert|5,418|m3/s|cuft/s|disp=table}}
|1957
|{{convert|6,254|m3/s|cuft/s|disp=table}}
|1967
|{{convert|7,500|m3/s|cuft/s|disp=table}}
|1977
|{{convert|7,073|m3/s|cuft/s|disp=table}}
|-
|1928
|{{convert|5,005|m3/s|cuft/s|disp=table}}
|1938
|{{convert|6,867|m3/s|cuft/s|disp=table}}
|1948
|{{convert|6,357|m3/s|cuft/s|disp=table}}
|1958
|{{convert|6,340|m3/s|cuft/s|disp=table}}
|1968
|{{convert|5,660|m3/s|cuft/s|disp=table}}
|1978
|{{convert|7,120|m3/s|cuft/s|disp=table}}
|-
|1929
|{{convert|5,330|m3/s|cuft/s|disp=table}}
|1939
|{{convert|6,310|m3/s|cuft/s|disp=table}}
|1949
|{{convert|4,301|m3/s|cuft/s|disp=table}}
|1959
|{{convert|5,375|m3/s|cuft/s|disp=table}}
|1969
|{{convert|7,710|m3/s|cuft/s|disp=table}}
|1979
|{{convert|7,747|m3/s|cuft/s|disp=table}}
|-
|1930
|{{convert|5,197|m3/s|cuft/s|disp=table}}
|1940
|{{convert|9,533|m3/s|cuft/s|disp=table}}
|1950
|{{convert|5,130|m3/s|cuft/s|disp=table}}
|1960
|{{convert|6,514|m3/s|cuft/s|disp=table}}
|1970
|{{convert|9,602|m3/s|cuft/s|disp=table}}
|1980
|{{convert|8,767|m3/s|cuft/s|disp=table}}
|-
| colspan="3" |'''{{convert|5,888|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,802|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,044|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,492|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|7,062|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,892|m3/s|cuft/s|abbr=values}}'''
|-
|1981
|{{convert|8,172|m3/s|cuft/s|disp=table}}
|1991
|{{convert|6,274|m3/s|cuft/s|disp=table}}
|2001
|{{convert|6,304.3|m3/s|cuft/s|disp=table}}
|2011
|{{convert|5,303|m3/s|cuft/s|disp=table}}
|2021
|{{convert|5,998|m3/s|cuft/s|disp=table}}
| colspan="3" rowspan="11" |
|-
|1982
|{{convert|6,700|m3/s|cuft/s|disp=table}}
|1992
|{{convert|5,710.8|m3/s|cuft/s|disp=table}}
|2002
|{{convert|6,837.1|m3/s|cuft/s|disp=table}}
|2012
|{{convert|5,053|m3/s|cuft/s|disp=table}}
|2022
|{{convert|4,373|m3/s|cuft/s|disp=table}}
|-
|1983
|{{convert|5,543|m3/s|cuft/s|disp=table}}
|1993
|{{convert|4,873|m3/s|cuft/s|disp=table}}
|2003
|{{convert|5,021|m3/s|cuft/s|disp=table}}
|2013
|{{convert|7,164|m3/s|cuft/s|disp=table}}
|2023
|{{convert|6,665|m3/s|cuft/s|disp=table}}
|-
|1984
|{{convert|6,325|m3/s|cuft/s|disp=table}}
|1994
|{{convert|6,031.8|m3/s|cuft/s|disp=table}}
|2004
|{{convert|6,524|m3/s|cuft/s|disp=table}}
|2014
|{{convert|7,446|m3/s|cuft/s|disp=table}}
|2024
| {{convert|5,776.4|m3/s|cuft/s|disp=table}}
|-
|1985
|{{convert|6,449|m3/s|cuft/s|disp=table}}
|1995
|{{convert|6,223.7|m3/s|cuft/s|disp=table}}
|2005
|{{convert|8,711|m3/s|cuft/s|disp=table}}
|2015
|{{convert|6,138|m3/s|cuft/s|disp=table}}
|2025
|{{convert|4,091.4|m3/s|cuft/s|disp=table}}
|-
|1986
|{{convert|6,257|m3/s|cuft/s|disp=table}}
|1996
|{{convert|7,035.8|m3/s|cuft/s|disp=table}}
|2006
|{{convert|8,428|m3/s|cuft/s|disp=table}}
|2016
|{{convert|6,465|m3/s|cuft/s|disp=table}}
|2026
| ||<!--placeholder cell. Remove || when adding a value-->
|-
|1987
|{{convert|6,619|m3/s|cuft/s|disp=table}}
|1997
|{{convert|6,684.2|m3/s|cuft/s|disp=table}}
|2007
|{{convert|5,626|m3/s|cuft/s|disp=table}}
|2017
|{{convert|5,202|m3/s|cuft/s|disp=table}}
|2027
| ||<!--placeholder cell. Remove || when adding a value-->
|-
|1988
|{{convert|6,383|m3/s|cuft/s|disp=table}}
|1998
|{{convert|6,804.6|m3/s|cuft/s|disp=table}}
|2008
|{{convert|5,909|m3/s|cuft/s|disp=table}}
|2018
|{{convert|6,487.8|m3/s|cuft/s|disp=table}}
|2028
| ||<!--placeholder cell. Remove || when adding a value-->
|-
|1989
|{{convert|5,448|m3/s|cuft/s|disp=table}}
|1999
|{{convert|7,951.5|m3/s|cuft/s|disp=table}}
|2009
|{{convert|6,492|m3/s|cuft/s|disp=table}}
|2019
|{{convert|5,579|m3/s|cuft/s|disp=table}}
|2029
| ||<!--placeholder cell. Remove || when adding a value-->
|-
|1990
|{{convert|4,194|m3/s|cuft/s|disp=table}}
|2000
|{{convert|6,580.6|m3/s|cuft/s|disp=table}}
|2010
|{{convert|9,598|m3/s|cuft/s|disp=table}}
|2020
|{{convert|4,893.5|m3/s|cuft/s|disp=table}}
|2030
| ||<!--placeholder cell. Remove || when adding a value-->
|-
| colspan="3" |'''{{convert|6,209|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,417|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|6,945|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|5,973|m3/s|cuft/s|abbr=values}}'''
| colspan="3" |'''{{convert|5,381|m3/s|cuft/s|abbr=values}}'''
|-
| colspan="23" |''Multiannual average discharge 1742 to 2025:'' ~ '''''{{convert|6,500|m3/s|cuft/s|abbr=on}}'''''
|-
| colspan="23" |Source:<ref name="The first tree-ring reconstruction of streamflow variability over the last ~250 years in the Lower Danube">{{cite journal|title=The first tree-ring reconstruction of streamflow variability over the last ~250 years in the Lower Danube|last1=Nagaviciuc|first1=Viorica|last2=Roibu|first2=Cătălin-Constantin|last3=Mursa|first3=Andrei|last4=Ştirbu|first4=Marian-Ionuţ|last5=Popa|first5=Ionel|last6=Ionita|first6=Monica|year=2023|doi=10.1016/j.jhydrol.2023.129150 |s2cid=256288140 |journal=Journal of Hydrology|doi-access=free}}</ref><ref name="INHGA">{{cite web|url=https://www.hidro.ro|title=INHGA |url-status=live |archive-url=https://web.archive.org/web/20231216143728/https://www.hidro.ro/ |archive-date= Dec 16, 2023 }}</ref><ref name="Annual Reports">{{cite web|url=https://www.icpdr.org/main/publications/annual-reports|title=Annual Reports |website=ICPDR |archive-url=https://web.archive.org/web/20230418005823/https://www.icpdr.org/main/publications/annual-reports |archive-date= Apr 18, 2023 }}</ref><ref name="IPCC">{{cite web|url=https://www.ipcc.ch|title=IPCC |url-status=live |archive-url=https://web.archive.org/web/20231221145430/https://www.ipcc.ch/ |archive-date= Dec 21, 2023 }}</ref><ref name="DIAGNOZA ŞI PROGNOZA PENTRU DUNĂRE"/><ref name="TNMN Yearbooks"/>
|}

==Tributaries==
{{Main|List of tributaries of the Danube}}
[[File:Szeged-tisza3.jpg|thumb|The [Tisza](/source/Tisza) is the longest tributary of the Danube.]]The land drained by the Danube extends into many other countries. Many Danubian tributaries are important rivers in their own right, navigable by barges and other shallow-draught boats. From its source to its outlet into the Black Sea, its main tributaries are (as they enter):

{| style="width:590px;"
|-
| style="width:45%;"|
# [Iller](/source/Iller) (entering at [Ulm](/source/Ulm))
# [Lech](/source/Lech_(river))
# [Altmühl](/source/Altm%C3%BChl) (entering at [Kelheim](/source/Kelheim))
# [Naab](/source/Naab) (entering at [Regensburg](/source/Regensburg))
# [Regen](/source/Regen_(river)) (entering at [Regensburg](/source/Regensburg))
# [Isar](/source/Isar)
# [Inn](/source/Inn_(river)) (entering at [Passau](/source/Passau))
# [Ilz](/source/Ilz) (entering at [Passau](/source/Passau))
# [Enns](/source/Enns_(river)) (entering at [Enns](/source/Enns_(town)))
# [Morava](/source/Morava_(river)) (entering near [Devín Castle](/source/Dev%C3%ADn_Castle))
# [Rába](/source/R%C3%A1ba) (entering at [Győr](/source/Gy%C5%91r))
# [Váh](/source/V%C3%A1h) (entering at [Komárno](/source/Kom%C3%A1rno))
# [Hron](/source/Hron) (entering at [Štúrovo](/source/%C5%A0t%C3%BArovo))
# [Ipeľ](/source/Ipe%C4%BE)
# [Sió](/source/Si%C3%B3)
# [Drava](/source/Drava) (entering near [Osijek](/source/Osijek))
# [Vuka](/source/Vuka_(river)) (entering at [Vukovar](/source/Vukovar))
#
| style="width:45%;"|
18. [Tisza](/source/Tisza) (entering near [Titel](/source/Titel))<br/>
19. [Sava](/source/Sava) (entering at [Belgrade](/source/Belgrade))<br/>
20. [Timiș](/source/Timi%C8%99_(river)) (entering at [Pančevo](/source/Pan%C4%8Devo))<br/>
21. [Great Morava](/source/Great_Morava) (entering near [Smederevo](/source/Smederevo))<br/>
22. [Mlava](/source/Mlava) (entering near [Kostolac](/source/Kostolac))<br/>
23. [Karaš](/source/Kara%C5%A1) (entering near [Banatska Palanka](/source/Banatska_Palanka))<br/>
24. [Jiu](/source/Jiu_(river)) (entering at [Bechet](/source/Bechet))<br/>
25. [Iskar](/source/Iskar_(river)) (entering near [Gigen](/source/Gigen))<br/>
26. [Olt](/source/Olt_(river)) (entering at [Turnu Măgurele](/source/Turnu_M%C4%83gurele))<br/>
27. [Osam](/source/Osam) (entering near [Nikopol, Bulgaria](/source/Nikopol%2C_Bulgaria))<br/>
28. [Yantra](/source/Yantra_(river)) (entering near [Svishtov](/source/Svishtov))<br/>
29. [Argeș](/source/Arge%C8%99_(river)) (entering at [Oltenița](/source/Olteni%C8%9Ba))<br/>
30. [Ialomița](/source/Ialomi%C8%9Ba_(river))<br/>
31. [Siret](/source/Siret_(river)) (entering near [Galați](/source/Gala%C8%9Bi))<br/>
32. [Prut](/source/Prut) (entering near [Galați](/source/Gala%C8%9Bi))
|}

<gallery>
File:Donaueschingen Donauzusammenfluss 20080714.jpg|The Danube's source confluence in [Donaueschingen](/source/Donaueschingen): the ''Donauzusammenfluss'', the confluence of [Breg](/source/Breg_(river)) and [Brigach](/source/Brigach).
File:Háros-Szigetcsúcs.ogg|Danube at Budapest - Háros Island Peak at Budafok
File:Дунайський біосферний заповідник 2.JPG|0&nbsp;km, [Danube Delta](/source/Danube_Delta), [Ukraine](/source/Ukraine)
File:Danube Delta ESA23450088.jpeg|Where the Danube meets the [Black Sea](/source/Black_Sea) ([European Space Agency](/source/European_Space_Agency) [Sentinel-2](/source/Sentinel-2) image)
File:The Danube Spills into the Black Sea.jpg|The Danube discharges into the [Black Sea](/source/Black_Sea) (the upper body of water in the image).
</gallery>

==Cities and towns==
{{Main|List of cities and towns on the river Danube}}
[[File:Aerial image of Passau.jpg|thumb|3-color confluence of (from left to right) [Inn](/source/Inn_(river)), Danube, and [Ilz](/source/Ilz) in [Passau](/source/Passau)]]

The Danube flows through many cities, including four national capitals (shown below in bold), more than any other river in the world. Ordered from source to mouth they are:
*Germany
**[Donaueschingen](/source/Donaueschingen) in the [State](/source/States_of_Germany) of [Baden-Württemberg](/source/Baden-W%C3%BCrttemberg) – rivers [Brigach](/source/Brigach) and [Breg](/source/Breg_(river)) join to form the Danube
**[Möhringen an der Donau](/source/Tuttlingen) in Baden-Württemberg
**[Tuttlingen](/source/Tuttlingen) in Baden-Württemberg
**[Sigmaringen](/source/Sigmaringen) in Baden-Württemberg
**[Riedlingen](/source/Riedlingen) in Baden-Württemberg
**[Munderkingen](/source/Munderkingen) in Baden-Württemberg
**[Ehingen](/source/Ehingen) in Baden-Württemberg
**[Erbach, Baden-Württemberg](/source/Erbach%2C_Baden-W%C3%BCrttemberg) in Baden-Württemberg
**[Ulm](/source/Ulm) in Baden-Württemberg
**[Neu-Ulm](/source/Neu-Ulm) in Bavaria
**[Günzburg](/source/G%C3%BCnzburg) in Bavaria
**[Dillingen an der Donau](/source/Dillingen_an_der_Donau) in Bavaria
**[Donauwörth](/source/Donauw%C3%B6rth) in Bavaria
**[Neuburg an der Donau](/source/Neuburg_an_der_Donau) in Bavaria
**[Ingolstadt](/source/Ingolstadt) in Bavaria
**[Kelheim](/source/Kelheim) in Bavaria
**[Regensburg](/source/Regensburg) in Bavaria
**[Straubing](/source/Straubing) in Bavaria
**[Deggendorf](/source/Deggendorf) in Bavaria
**[Passau](/source/Passau) in Bavaria
[[File:Linz Ars electronica center lila DL.jpg|thumb|Danube in [Linz](/source/Linz), Austria]]
*Austria
**[Linz](/source/Linz), capital of [Upper Austria](/source/Upper_Austria)
**[Krems](/source/Krems_an_der_Donau) in [Lower Austria](/source/Lower_Austria)
**[Tulln](/source/Tulln_an_der_Donau) in [Lower Austria](/source/Lower_Austria)
**'''[Vienna](/source/Vienna)'''&nbsp;– capital of [Austria](/source/Austria) and the most populous city on the Danube, where the Danube floodplain is called the ''[Lobau](/source/Lobau)'', though the ''[Innere Stadt](/source/Innere_Stadt)'' is nowadays situated away from the main flow of the Danube (it is still bounded by the [Donaukanal](/source/Donaukanal)&nbsp;– 'Danube canal').
[[File:Danube Bratislava 6.jpg|thumb|The Danube in [Bratislava](/source/Bratislava), Slovakia]]
*Slovakia
**'''[Bratislava](/source/Bratislava)'''&nbsp;– capital of [Slovakia](/source/Slovakia)
**[Komárno](/source/Kom%C3%A1rno)
**[Štúrovo](/source/%C5%A0t%C3%BArovo)
[[File:Várhegy2.JPG|thumb|Basilica of [Esztergom](/source/Esztergom), [Hungary](/source/Hungary)]]
*Hungary
**[Mosonmagyaróvár](/source/Mosonmagyar%C3%B3v%C3%A1r)
**[Győr](/source/Gy%C5%91r)
**[Komárom](/source/Kom%C3%A1rom)
**[Esztergom](/source/Esztergom)
**[Visegrád](/source/Visegr%C3%A1d)&nbsp;– This section of the river is also called [Danube Bend](/source/Danube_Bend).
**[Vác](/source/V%C3%A1c)
**[Szentendre](/source/Szentendre)
**[Göd](/source/G%C3%B6d)
**[Dunakeszi](/source/Dunakeszi)
**'''[Budapest](/source/Budapest)'''&nbsp;– capital of [Hungary](/source/Hungary), the largest city and the largest agglomeration on Danube (about 3,300,000 people).
**[Szigetszentmiklós](/source/Szigetszentmikl%C3%B3s)
**[Százhalombatta](/source/Sz%C3%A1zhalombatta)
**[Ráckeve](/source/R%C3%A1ckeve)
**[Adony](/source/Adony)
**[Dunaújváros](/source/Duna%C3%BAjv%C3%A1ros)
**[Dunaföldvár](/source/Dunaf%C3%B6ldv%C3%A1r)
**[Paks](/source/Paks)
**[Kalocsa](/source/Kalocsa)
**[Baja](/source/Baja%2C_Hungary)
**[Mohács](/source/Moh%C3%A1cs)
*Croatia
**[Vukovar](/source/Vukovar)
**[Ilok](/source/Ilok)
[[File:Petrovaradinska tvrđava, 12.jpg|thumb|[Petrovaradin Fortress](/source/Petrovaradin_Fortress) overlooking the Danube and [Novi Sad](/source/Novi_Sad), regional capital of [Vojvodina](/source/Vojvodina) in [Serbia](/source/Serbia)]]
[[File:Kalemegdanska_terasa_Apr_2011.jpg|thumb|Confluence of river [Sava](/source/Sava) into the Danube beneath [Fortress](/source/Belgrade_Fortress) in [Belgrade](/source/Belgrade), capital of [Serbia](/source/Serbia)]]
*Serbia
**[Apatin](/source/Apatin)
**[Bačka Palanka](/source/Ba%C4%8Dka_Palanka)
**[Čerević](/source/%C4%8Cerevi%C4%87)
**[Futog](/source/Futog)
**[Veternik](/source/Veternik)
**[Novi Sad](/source/Novi_Sad)&nbsp;– regional capital of [Vojvodina](/source/Vojvodina)
**[Sremski Karlovci](/source/Sremski_Karlovci)
**[Zemun](/source/Zemun)
**'''[Belgrade](/source/Belgrade)'''&nbsp;– capital of [Serbia](/source/Serbia)
**[Pančevo](/source/Pan%C4%8Devo)
**[Smederevo](/source/Smederevo)
**[Kovin](/source/Kovin)
**[Veliko Gradište](/source/Veliko_Gradi%C5%A1te)
**[Golubac](/source/Golubac)
**[Donji Milanovac](/source/Donji_Milanovac)
**[Kladovo](/source/Kladovo)
[[File:Nikopol-danube.jpg|thumb|Danube at [Nikopol, Bulgaria](/source/Nikopol%2C_Bulgaria) in winter]] 
*Bulgaria
**[Vidin](/source/Vidin)
**[Lom](/source/Lom%2C_Bulgaria)
**[Kozloduy](/source/Kozloduy)
**[Oryahovo](/source/Oryahovo)
**[Nikopol](/source/Nikopol%2C_Bulgaria)
**[Belene](/source/Belene)
**[Svishtov](/source/Svishtov)
**[Ruse](/source/Ruse%2C_Bulgaria)
**[Tutrakan](/source/Tutrakan)
**[Silistra](/source/Silistra)
[[File:Cazaresulinaoras2.jpg|thumb|The Danube in [Sulina](/source/Sulina), [Romania](/source/Romania)]]
*Romania
**[Moldova Nouă](/source/Moldova_Nou%C4%83)
**[Orșova](/source/Or%C8%99ova)
**[Drobeta-Turnu Severin](/source/Drobeta-Turnu_Severin)
**[Calafat](/source/Calafat)
**[Bechet](/source/Bechet)
**[Dăbuleni](/source/D%C4%83buleni)
**[Corabia](/source/Corabia)
**[Turnu Măgurele](/source/Turnu_M%C4%83gurele)
**[Zimnicea](/source/Zimnicea)
**[Giurgiu](/source/Giurgiu)
**[Oltenița](/source/Olteni%C8%9Ba)
**[Călărași](/source/C%C4%83l%C4%83ra%C8%99i)
**[Fetești](/source/Fete%C8%99ti)
**[Cernavodă](/source/Cernavod%C4%83)
**[Hârșova](/source/H%C3%A2r%C8%99ova)
**[Brăila](/source/Br%C4%83ila)&nbsp;– limit of the maritime sector of the Danube
**[Galați](/source/Gala%C8%9Bi)&nbsp;– largest port on the Danube
**[Isaccea](/source/Isaccea)
**[Tulcea](/source/Tulcea)
**[Sulina](/source/Sulina)
*Moldova
**[Giurgiulești](/source/Giurgiule%C8%99ti)
*Ukraine
**[Reni](/source/Reni%2C_Ukraine)
**[Izmail](/source/Izmail)
**[Kiliia](/source/Kiliia)
**[Vylkove](/source/Vylkove)

{{wide image|Panorama of Danube in Vienna.jpg|1000px|Panorama of the Danube in Vienna}}
{{wide image|DonauknieVisegrad_2.jpg|1000px|The [Danube Bend](/source/Danube_Bend) is a curve of the Danube in [Hungary](/source/Geography_of_Hungary), near the city of [Visegrád](/source/Visegr%C3%A1d). The [Transdanubian Mountains](/source/Transdanubian_Mountains) lie on the right bank (left side of the picture), while the [North Hungarian Mountains](/source/North_Hungarian_Mountains) on the left bank (right side of the picture).}}
{{wide image|Budapest view with Parliament.jpg|1000px|Panorama of the Danube in Budapest with the Hungarian Parliament (left)}}
{{wide image|Budapest from Gellert Hill MC.jpg|1000px|Budapest at night}}
{{wide image|Novi Sad - Gigapixelna panorama2.jpg|1000px|Panorama of the Danube in [Novi Sad](/source/Novi_Sad) from [Petrovaradin Fortress](/source/Petrovaradin_Fortress), [Serbia](/source/Serbia)}}
{{wide image|The confluence of the Sava into the Danube at Belgrade.jpg|900px|The confluence of the [Sava](/source/Sava) into the Danube at [Belgrade](/source/Belgrade). Pictured from [Belgrade Fortress](/source/Belgrade_Fortress), [Serbia](/source/Serbia)}}
{{Wide image|Belgrade Panorama.jpg|1000px|Panoramic image of the rivers Danube and Sava from [Kalemegdan](/source/Kalemegdan), Belgrade [Serbia](/source/Serbia)}}
{{wide image|Pano-Donau-Danube.jpg|1000px|The Danube entering the [Iron Gate](/source/Iron_Gates) at the [Carpathian Mountains](/source/Carpathian_Mountains). Romania on the left side, [Golubac Fortress](/source/Golubac_Fortress) and Serbia on the right side.}}

==Islands==
{{Further|List of islands in the Danube}}
[[File:Budapest by air.jpg|thumb|Aerial view of [Margaret Island](/source/Margaret_Island), [Budapest](/source/Budapest), Hungary. There are 15 bridges over the Danube in Budapest.]]
[[File:Belgrade_Aerial_K1.jpg|thumb|[Great War Island](/source/Great_War_Island) in Belgrade, Serbia. It is located at the confluence of the [Sava](/source/Sava) and Danube.]]
[[File:Ada Kaleh.jpg|thumb|[Ada Kaleh](/source/Ada_Kaleh) island in today's [Romania](/source/Romania) was forgotten during the peace talks at the [Congress of Berlin](/source/Congress_of_Berlin) in 1878. It was submerged during the construction of the [Iron Gates hydroelectric plant](/source/Iron_Gate_I_Hydroelectric_Power_Station) in 1970.]]

*[Ada Kaleh Island](/source/Ada_Kaleh_Island)
*Ostrovul Mare, [Gogoșu](/source/Gogo%C8%99u%2C_Mehedin%C8%9Bi)
*[Balta Ialomiței](/source/Balta_Ialomi%C8%9Bei)
*[Belene Island](/source/Belene_Island)
*[Csepel Island](/source/Csepel_Island)
*[Čakljanac Island](/source/%C4%8Cakljanac)
*[Donauinsel](/source/Donauinsel)
*[Forkontumac Island](/source/Forkontumac)
*[Great Brăila Island](/source/Great_Br%C4%83ila_Island)
*[Great War Island](/source/Great_War_Island)
*[Island of Mohács](/source/Island_of_Moh%C3%A1cs)
*Koh Chang Island, [Sremski Karlovci](/source/Sremski_Karlovci)
*[Kozloduy Island](/source/Kozloduy_Island)
*[Margaret Island](/source/Margaret_Island)
*[Ostrovo (Kostolac)](/source/Ostrovo_(Kostolac))
*[Ostrovul Ciocănești](/source/Ostrovul_Cioc%C4%83ne%C8%99ti)
*[Ostrovul Mare, Islaz](/source/Ostrovul_Mare%2C_Islaz)
*[Paradajz Island](/source/Paradajz)
*{{ill|Ribarsko Ostrvo|sr|Споменик природе Рибарско острво}}, [Novi Sad](/source/Novi_Sad)
*[Island of Šarengrad](/source/Island_of_%C5%A0arengrad)
*[Szigetköz](/source/Szigetk%C3%B6z)
*[Island of Szentendre](/source/Island_of_Szentendre)
*[Vardim Island](/source/Vardim_Island)
*[Island of Vukovar](/source/Island_of_Vukovar)
*[Žitný ostrov](/source/%C5%BDitn%C3%BD_ostrov)

==Sectioning==<!-- This section is linked from [Bratislava](/source/Bratislava) -->
*Upper Section: From spring to [Devín Gate](/source/Dev%C3%ADn_Gate), at the border of Austria and Slovakia. Danube remains a characteristic mountain river until [Passau](/source/Passau), with average bottom gradient 0.12% (1200 ppm), from Passau to Devín Gate the gradient lessens to 0.06% (600 ppm).
*Middle Section: From Devín Gate to [Iron Gate](/source/Iron_Gate_(Danube)), at the border of Serbia and Romania. The riverbed widens and the average bottom gradient becomes only 0.006% (60 ppm).
*Lower Section: From Iron Gate to [Pătlăgeanca](/source/P%C4%83tl%C4%83geanca), with average gradient as little as 0.003% (30 ppm).
*Delta: From Pătlăgeanca to [Sulina](/source/Sulina), where the Danube meets the Black Sea. The river splits into three main distributaries.<ref>{{Cite journal |last1=Strat |first1=Daniela |last2=Gheorghe |first2=Iuliana |date=2023-04-17 |title=Conservation Status and Effectiveness of the National and International Policies for the Protection and Conservation of Sturgeons in the Danube River and Black Sea Basin |journal=Diversity |language=en |volume=15 |issue=4 |pages=568 |doi=10.3390/d15040568 |doi-access=free |bibcode=2023Diver..15..568S |issn=1424-2818}}</ref>

==Modern navigation==
{{expand section|how the "Iron Gate" relates to ship navigation?|date=November 2022}}
[[File:Parliament Budapest Hungary.jpg|thumb|The Danube in [Budapest](/source/Budapest)]]
[[File:DanubedeltaSulinaarm2.jpg|thumb|Fisherman in the [Danube Delta](/source/Danube_Delta)]]
[[File:Freight-ship-danube-320x240.ogg|thumb|[Barge](/source/Barge) being pushed on the Danube near [Vienna](/source/Vienna)]]

The Danube is navigable by ocean ships from the Black Sea to [Brăila](/source/Br%C4%83ila) in Romania (the maritime river sector), and further on by river ships to [Kelheim](/source/Kelheim), [Bavaria](/source/Bavaria), Germany; smaller craft can navigate further upstream to [Ulm](/source/Ulm), [Württemberg](/source/W%C3%BCrttemberg), Germany. About 60 of its tributaries are also navigable.

Since the completion of the German [Rhine–Main–Danube Canal](/source/Rhine-Main-Danube_Canal) in 1992, the river has been part of a trans-European waterway from [Rotterdam](/source/Rotterdam) on the [North Sea](/source/North_Sea) to [Sulina](/source/Sulina) on the Black Sea, a distance of {{convert|3500|km|sp=us|abbr=on}}. In 1994 the Danube was declared one of ten [Pan-European transport corridors](/source/Pan-European_corridors), routes in Central and Eastern Europe that required major investment over the following ten to fifteen years.{{citation needed|date=November 2022}} The amount of goods transported on the Danube increased to about 100 million tons in 1987. In 1999, transport on the river was made difficult by the [NATO bombing](/source/1999_NATO_bombing_of_Yugoslavia) of three bridges in Serbia during the [Kosovo War](/source/Kosovo_War). Clearance of the resulting debris was completed in 2002, and a temporary [pontoon bridge](/source/pontoon_bridge) that hampered navigation was removed in 2005.{{citation needed|date=November 2022}}

At the [Iron Gate](/source/Iron_Gate_(Danube)), the Danube flows through a [gorge](/source/Canyon) that forms part of the boundary between Serbia and Romania; it contains the [Iron Gate I Hydroelectric Power Station](/source/Iron_Gate_I_Hydroelectric_Power_Station) dam, followed at about {{convert|60|km|sp=us|abbr=on}} downstream (outside the gorge) by the [Iron Gate II Hydroelectric Power Station](/source/Iron_Gate_II_Hydroelectric_Power_Station). On 13 April 2006, a record peak discharge at Iron Gate Dam reached {{convert|15400|m3/s|sp=us|abbr=on}}.

There are three artificial waterways built on the Danube: the [Danube-Tisa-Danube Canal](/source/Danube-Tisa-Danube_Canal) (DTD) in the [Banat](/source/Banat) and [Bačka](/source/Ba%C4%8Dka) regions ([Vojvodina](/source/Vojvodina), northern province of Serbia); the {{convert|64|km|sp=us|abbr=on}} [Danube-Black Sea Canal](/source/Danube-Black_Sea_Canal), between [Cernavodă](/source/Cernavod%C4%83) and [Constanța](/source/Constan%C8%9Ba) (Romania) finished in 1984, shortens the distance to the Black Sea by {{convert|400|km|sp=us|abbr=on}}; the [Rhine–Main–Danube Canal](/source/Rhine%E2%80%93Main%E2%80%93Danube_Canal) is about {{convert|171|km|sp=us|abbr=on}}, finished in 1992, linking the North Sea to the Black Sea.<ref>{{Cite web|url=http://ines-danube.info/goto.php?target=file_1442_download&client_id=viailias4|title=Danube navigation at a glance |website=INeS Danube |archive-url=https://web.archive.org/web/20210226160839/http://ines-danube.info/goto.php?target=file_1442_download&client_id=viailias4 |archive-date= Feb 26, 2021 }}</ref> A Danube-Aegean canal has been proposed.<ref>{{Cite web |last=Tzimas |first=Stavros |title=Chinese interests could make plan to link Danube and Aegean a reality |url=https://www.ekathimerini.com/economy/221159/chinese-interests-could-make-plan-to-link-danube-and-aegean-a-reality/ |access-date=11 July 2022 |website=eKathimerini.com |date=Aug 28, 2017 |language=English}}</ref>

[Cruising](/source/River_cruise) on the Danube is a popular sightseeing activity, especially between [Passau](/source/Passau), Germany, to [Budapest](/source/Budapest), Hungary.<ref>{{Cite web |last=Sarna |first=Heidi |date=August 15, 2019 |title=10 Best River Cruises |url=https://www.frommers.com/slideshows/818945-10-best-river-cruises |url-status=live |archive-url=https://web.archive.org/web/20230921093944/https://www.frommers.com/slideshows/818945-10-best-river-cruises |archive-date=Sep 21, 2023 |website=Frommer's}}</ref>

==Piracy==
In 2010–12, shipping companies, especially from Ukraine, claimed that their vessels suffered from "regular [pirate attacks](/source/piracy)" on the Serbian and the Romanian stretches of the Danube.<ref>{{cite web|url=http://www.jutarnji.hr/rijecni-gusari-u-srbiji-pljackaju-hrvatske-brodove--zadnja-zrtva-brod--quot-sloga-quot--sisackog--quot-dunavskog-lloyda-quot-/980402/|title=Riječni gusari u Srbiji pljačkaju hrvatske brodove|language=hr|first=Mate|last=Piškor|date=12 October 2011 |website=Jutarnji list |archive-url=https://web.archive.org/web/20200301213528/https://www.jutarnji.hr/vijesti/crna-kronika/rijecni-gusari-u-srbiji-pljackaju-hrvatske-brodove-sa-sloge-ukrali-opremu-vrijednu-60-tisuca-eura/1724961/ |archive-date= Mar 1, 2020 }}</ref><ref>{{cite web |url=http://un.ua/eng/article/369989.html |title=Ukrainian Danube Shipping Company Says Its Ships Are Being Attacked Frequently in Romanian Part Of River Danube |publisher=Ukrainian News |date=January 13, 2012 |access-date=11 June 2012 |archive-url=https://web.archive.org/web/20120114032713/http://un.ua/eng/article/369989.html |archive-date=14 January 2012 }}</ref><ref>{{cite web|url=https://gazeta.ua/articles/np/_ukrajinski-korabli-vse-chastishe-stayut-zhertvami-rumunskih-pirativ/419063|title=Українські кораблі все частіше стають жертвами румунських піратів|website=Gazeta.ua|trans-title=Romanian Pirates Attack Ukrainian Ships More Frequently|language=uk|date=20 January 2012|first=Олена|last=Гордієва |url-status=live |archive-url=https://web.archive.org/web/20230405202115/https://gazeta.ua/articles/np/_ukrayinski-korabli-vse-chastishe-stayut-zhertvami-rumunskih-pirativ/419063 |archive-date= Apr 5, 2023 }}</ref> However, the transgressions may not be considered acts of piracy, as defined according to the [United Nations Convention on the Law of the Sea](/source/United_Nations_Convention_on_the_Law_of_the_Sea), but rather instances of "river robbery".<ref>{{cite web |url=http://www.rivercruiseinfo.com/content/pirates-lower-danube |title=Pirates on the lower Danube |archive-url=https://web.archive.org/web/20131214175158/http://www.rivercruiseinfo.com/content/pirates-lower-danube |archive-date=14 December 2013 |website=rivercruiseinfo |author=Ingo_Eigen |date=Feb 27, 2012 }}</ref>

On the other hand, media reports say the crews on transport ships often steal and sell their own cargo and then blame the plundering on "pirates", and the alleged attacks are not piracy but small-time [contraband](/source/contraband) theft along the river.<ref>{{Cite news |last=Tomiuc |first=Eugen |date=2012-02-05 |title=Reports Of 'Pirates Of The Danube' Get The Old Heave-Ho |language=en |work=Radio Free Europe/Radio Liberty |url=https://www.rferl.org/a/romania_danube_river_pirates_ukraine/24474067.html |url-status=live |archive-url= https://web.archive.org/web/20230909064917/https://www.rferl.org/a/romania_danube_river_pirates_ukraine/24474067.html |archive-date= Sep 9, 2023 }}</ref>

==Danube Delta==
{{Main|Danube Delta}}

[[File:Вилково, Дунайские плавни 1962 г.JPG|thumb|Russian-speaking [Lipovans](/source/Lipovans) in the Danube Delta]]
The Danube Delta ({{langx|ro|Delta Dunării}} {{IPA|ro|ˈdelta ˈdunərij|pron}}; {{langx|uk|Дельта Дунаю|translit=Del'ta Dunayu}}) is the largest [river delta](/source/river_delta) in the [European Union](/source/European_Union). The greater part of the Danube Delta lies in Romania (Tulcea county), while its northern part, on the left bank of the Chilia arm, is situated in Ukraine (Odesa Oblast). The approximate surface is {{convert|4152|km2|sp=us|abbr=on}}, of which {{convert|3446|km2|sp=us|abbr=on}} are in Romania. If one includes the lagoons of [Razim-Sinoe](/source/Lake_Razelm) ({{convert|1015|km2|sp=us|abbr=on}} of which {{convert|865|km2|sp=us|abbr=on}} water surface), which are located south of the delta proper, but are related to it geologically and ecologically (their combined territory is part of the World Heritage Site), the total area of the Danube Delta reaches {{convert|5165|km2|sp=us|abbr=on}}.

The Danube Delta is also the best-preserved river delta in Europe, a [UNESCO World Heritage Site](/source/UNESCO_World_Heritage_Site) (since 1991) and a [Ramsar Site](/source/Ramsar_Convention). Its lakes and marshes support 45 freshwater fish species. Its wetlands support vast flocks of migratory birds of over 300 species, including the endangered [pygmy cormorant](/source/pygmy_cormorant) (''Phalacrocorax pygmaeus''). These are threatened by rival canalization and drainage schemes such as the [Bystroye Canal](/source/Bystroye_Canal).<ref>{{cite book|url=https://www.unece.org/fileadmin/DAM/env/eia/documents/inquiry/Rom.1.pdf|title=Documentation on the likely significant transboundary impact of the Ukrainian deep-water navigation canal Danube-black sea in the context of Espoo Convention, 1991|year=2005|author=Staras, Mircea|publisher=Danube Delta National Institute|publication-date=February 2005|location=[Tulcea](/source/Tulcea), [Romania](/source/Romania)|archive-date=3 August 2020|archive-url=https://web.archive.org/web/20200803080734/https://www.unece.org/fileadmin/DAM/env/eia/documents/inquiry/Rom.1.pdf|access-date=20 September 2020|url-status=live}}</ref>

==International cooperation==
===Ecology and environment===
{{Main|International Commission for the Protection of the Danube River}}

[[File:Pelicani din Delta Dunarii.PNG|thumb|right|[Pelicans](/source/Pelicans) in the [Danube Delta](/source/Danube_Delta), Romania]]

The International Commission for the Protection of the Danube River (ICPDR) is an organization that consists of 14 member states (Germany, Austria, the Czech Republic, Slovakia, Slovenia, Hungary, Croatia, Bosnia and Herzegovina, Serbia, Bulgaria, Romania, Moldova, Montenegro, and Ukraine) and the [European Union](/source/European_Union). The commission, established in 1998, deals with the whole Danube river basin, which includes tributaries and groundwater resources. Its goal is to implement the Danube River Protection Convention by promoting and coordinating sustainable and equitable water management, including conservation, improvement, and rational use of waters and the implementation of the EU [Water Framework Directive](/source/Water_Framework_Directive) and the [Danube Strategy](/source/Danube_Strategy).

===Navigation===
{{Main|Danube Commission}}

The Danube Commission is concerned with the maintenance and improvement of the river's navigation conditions. It was established in 1948 by seven countries bordering the river. Members include representatives from Austria, Bulgaria, Croatia, Germany, Hungary, Moldova, Slovakia, Romania, Russia, Ukraine, and Serbia; it meets regularly twice a year. It also convenes groups of experts to consider items provided for in the commission's working plans.

The commission dates to the Paris Conferences of 1856 and 1921, which established for the first time an international regime to safeguard free navigation on the Danube. Today the Commission include riparian and non-riparian states.

==Geology==
[[File:Evening at Danube gorge.jpg|thumb|right| [Iron Gates](/source/Iron_Gate_(Danube)), Serbia-Romania border]]
[[File:Dam Serbia Djerdap 2.jpg|thumb|right|[Iron Gate II Hydroelectric Power Station](/source/Iron_Gate_II_Hydroelectric_Power_Station), Romania-Serbia]]
Although the [headwater](/source/headwater)s of the Danube are relatively small today, geologically, the Danube is much older than the [Rhine](/source/Rhine), with which its catchment area competes in today's southern Germany. This has a few interesting geological complications. Since the Rhine flows north towards the North Sea, a [continental divide](/source/continental_divide) beginning at [Piz Lunghin](/source/Piz_Lunghin) divides large parts of southern Germany, which is sometimes referred to as the [European Watershed](/source/European_Watershed).

Before the last [ice age](/source/ice_age) in the [Pleistocene](/source/Pleistocene), the Rhine started at the southwestern tip of the Black Forest, while the waters from the Alps that today feed the Rhine were carried east by the so-called ''Urdonau'' (original Danube). Parts of this ancient river's bed, which was much larger than today's Danube, can still be seen in (now waterless) canyons in today's landscape of the [Swabian Alb](/source/Swabian_Alb). The erosion of the [Upper Rhine valley](/source/Upper_Rhine_valley) led to [stream capture](/source/stream_capture); waters from the Alps changed their direction and began feeding the Rhine. Today's upper Danube is thus an [underfit stream](/source/underfit_stream).
[[File:Danube Iron Gorge La Cazane.JPG|thumb|The [Iron Gate](/source/Iron_Gate_(Danube)), on the Serbian-Romanian border ([Iron Gates natural park](/source/Iron_Gates_natural_park) and [Đerdap national park](/source/%C4%90erdap_national_park))]]
Since the Swabian Alb is largely shaped of porous [limestone](/source/limestone), and since the Rhine's level is much lower than the Danube's, today subsurface rivers carry much water from the Danube to the Rhine. On many days in the summer, when the Danube carries little water, it completely sinks into these underground channels at two locations in the Swabian Alb, which are referred to as the Donauversickerung ([Danube Sink](/source/Danube_Sinkhole)). Most of this water resurfaces only {{convert|12|km|mi|sp=us|abbr=on}} south at the [Aachtopf](/source/Aachtopf), Germany's wellspring with the highest flow, an average of {{convert|8500|L/s|cuft/s|sp=us|abbr=on}}, north of [Lake Constance](/source/Lake_Constance)—thus feeding the Rhine. The European Water Divide applies only for those waters that pass beyond this point, which only occurs during the days of the year when the Danube carries enough water to survive the sinkholes in the Donauversickerung.

Since such large volumes of underground water erode much of the surrounding limestone, it is predicted that the Danube upper course will one day disappear entirely in favor of the Rhine, an event called [stream capturing](/source/Stream_capture).

The hydrological parameters of Danube are regularly monitored in Croatia at [Batina](/source/Batina), [Dalj](/source/Dalj), [Vukovar](/source/Vukovar) and [Ilok](/source/Ilok).<ref>{{cite web | url = http://hidro.hr/hidro_e.php?id=hidro&param=Podaci_e | title = Daily hydrological report | publisher = [State Hydrometeorological Bureau of the Republic of Croatia](/source/State_Hydrometeorological_Bureau_of_the_Republic_of_Croatia) | access-date = 9 September 2010 | archive-date = 30 May 2010 | archive-url = https://web.archive.org/web/20100530062812/http://hidro.hr/hidro_e.php?id=hidro&param=Podaci_e }}</ref>

==History==
<!-- This section is linked from [Marcus Aurelius](/source/Marcus_Aurelius) -->
[[File:Guerre d'orient, combat sur le Danube.jpg|thumb|Combat between Russian and Turkish forces on the Danube in 1854, during the [Crimean War](/source/Crimean_War) (1853–1856)]]
The Danube basin was the site of some of the earliest human cultures. The [Danubian Neolithic](/source/Danubian_culture) cultures include the [Linear Pottery culture](/source/Linear_Pottery_culture)s of the mid-Danube basin. Many sites of the sixth-to-third millennium BCE [Vinča culture](/source/Vin%C4%8Da_culture) (Vinča, Serbia), are sited along the Danube. The third millennium BCE [Vučedol culture](/source/Vu%C4%8Dedol_culture) (from the Vučedol site near [Vukovar](/source/Vukovar), [Croatia](/source/Croatia)) is famous for its ceramics.

[Darius the Great](/source/Darius_the_Great), [king of Persia](/source/Achaemenid_Empire), crossed the river in the late 6th century BCE to [invade European Scythia](/source/European_Scythian_campaign_of_Darius_I) and to subdue the [Scythians](/source/Scythians).

[Alexander the Great](/source/Alexander_the_Great) defeated the Triballian king [Syrmus](/source/Syrmus) and the northern barbarian Thracian and Illyrian tribes by advancing from Macedonia as far as the Danube in 336 BCE.

Under the Romans, the Danube formed the border of the Empire with the tribes to the north almost from its source to its mouth. At the same time, it was a route for the transport of troops and the supply of settlements downstream. From 37 CE to the reign of the Emperor [Valentinian I](/source/Valentinian_I) (364–375) the [Danubian Limes](/source/Danubian_Limes) was the northeastern border of the Empire, with occasional interruptions such as the fall of the Danubian Limes in 259. The crossing of the Danube into [Dacia](/source/Roman_Dacia) was achieved by the ''Imperium Romanum'', first in two battles in 102 and then in 106 after the construction of a bridge in 101 near the garrison town of [Drobeta](/source/Drobeta_Turnu_Severin) at the Iron Gate. This victory over Dacia under [Decebalus](/source/Decebalus) enabled the Province of [Dacia](/source/Dacia_(province)) to be created, but in 271 it was abandoned by emperor [Aurelian](/source/Aurelian).

[Avars](/source/Avar_Khaganate) used the river as their southeastern border in the 6th century.

<gallery widths="200px" heights="160px">
File:Trajan's Bridge Across the Danube, Modern Reconstruction.jpg|An illustration of [Trajan's Bridge](/source/Trajan's_Bridge), the first span of the [Lower Danube](/source/Lower_Danube) (located between modern [Serbia](/source/Serbia) and [Romania](/source/Romania)). Constructed by [Apollodorus of Damascus](/source/Apollodorus_of_Damascus) between 103 and 105 [CE](/source/Common_Era), destroyed 270 AD. 
File:Mária Valéria´s bridge.jpg|At [Esztergom](/source/Esztergom) and [Štúrovo](/source/%C5%A0t%C3%BArovo), the Danube separates [Hungary](/source/Hungary) from [Slovakia](/source/Slovakia).
File:Vena 06.jpg|The Danube in [Vienna](/source/Vienna)
File:Danube at belene.jpg|The Danube between [Belene](/source/Belene) and [Belene Island](/source/Belene_Island), Bulgaria
File:Frozen Danube Reichsbrücke.JPG|View upstream from the [Donauinsel](/source/Donauinsel) in Vienna, [Austria](/source/Austria), during an unusually cold winter (February 2006), as the river rarely freezes there<ref name="ORFDonau2006">{{cite news |date=2 February 2006 |title=Eis auf der Donau nicht betreten |url=https://wiev1.orf.at/stories/87132 |work=wien.ORF.at |publisher=ORF |language=de |access-date=31 May 2026}}</ref>
File:Bratislavaminorflood.jpg|[Bratislava](/source/Bratislava) does not usually suffer major floods, but the Danube sometimes overflows its right bank.
</gallery>

===Ancient cultural perspectives of the lower Danube===
Part of the rivers Danubius or Istros was also known as (together with the Black Sea) the ''Okeanos'' in ancient times, being called the ''Okeanos Potamos'' (Okeanos River). The lower Danube was also called the ''Keras Okeanoio'' (Gulf or Horn of Okeanos) in the ''[Argonautica](/source/Argonautica)'' by [Apollonius Rhodos](/source/Apollonius_of_Rhodes) (Argon. IV. 282). <!-- [needs not only cites but some explanation of relevance, particularly for references to Lithuanian linguistics]{{Or|date=July 2009}}{{Citation needed|date=July 2009}}.-->

At the end of the ''Okeanos Potamos'', is the holy island of Alba (Leuke, Pytho Nisi, [Isle of Snakes](/source/Snake_Island_(Ukraine))), sacred to the Pelasgian (and later, Greek) Apollo, greeting the sun rising in the east. [Hecateus Abderitas](/source/Hecateus_Abderitas) refers to Apollo's island from the region of the Hyperboreans, in the Okeanos. It was on Leuke, in one version of his legend, that the hero Achilles was buried (to this day, one of the mouths of the Danube is called Chilia). Old Romanian folk songs recount a white monastery on a white island with nine priests.<ref name=Densusianu>[http://www.pelasgians.org/ ''Dacia Preistorica''] {{Webarchive|url=https://web.archive.org/web/20080707015920/http://www.pelasgians.org/ |date=7 July 2008 }}, Nicolae Densusianu (1913).</ref>

===Rivalry and trade along the Danube===
{{Unreferenced section|date=February 2013}}
[[File:Reprise Buda 1686.jpg|thumb|The [Holy League](/source/Holy_League_(1684)) took [Ottoman](/source/Ottoman_Hungary)-held [Buda](/source/Buda) after a long [siege](/source/Siege_of_Buda_(1686)) in 1686.]]
Between the late 14th and late 19th centuries, the [Ottoman Empire](/source/Ottoman_Empire) competed first with the [Kingdom of Serbia](/source/Kingdom_of_Serbia_(medieval)), [Second Bulgarian Empire](/source/Second_Bulgarian_Empire), [Kingdom of Hungary](/source/Kingdom_of_Hungary), [Principality of Wallachia](/source/Principality_of_Wallachia), [Principality of Moldavia](/source/Principality_of_Moldavia) and later with the [Habsburg monarchy](/source/Habsburg_monarchy), [Polish–Lithuanian Commonwealth](/source/Polish%E2%80%93Lithuanian_Commonwealth), and [Russian Empire](/source/Russian_Empire) for controlling the Danube (طونه, ''Tuna'' in [Turkish](/source/Turkish_language)), which became the northern border of the Ottoman Empire for centuries. Many of the [Ottoman–Hungarian Wars](/source/Ottoman%E2%80%93Hungarian_Wars) (1366–1526) and [Ottoman–Habsburg wars](/source/Ottoman%E2%80%93Habsburg_wars) (1526–1791) were fought along the river.

The most important [wars of the Ottoman Empire](/source/Ottoman_wars_in_Europe) along the Danube include the [Battle of Nicopolis](/source/Battle_of_Nicopolis) (1396), the [Siege of Belgrade](/source/Siege_of_Belgrade_(1456)) (1456), the [Battle of Mohács](/source/Battle_of_Moh%C3%A1cs) (1526), the first Turkish [Siege of Vienna](/source/Siege_of_Vienna_(1529)) (1529), the [Siege of Esztergom](/source/Siege_of_Esztergom_(1543)) (1543), the [Long War](/source/Long_War_(Ottoman_wars)) (1591–1606), the [Battle of Vienna](/source/Battle_of_Vienna) (1683), the [Great Turkish War](/source/Great_Turkish_War) (1683–1699), the [Crimean War](/source/Crimean_War) (1853–1856) and the [Russo-Turkish War](/source/Russo-Turkish_War_(1877%E2%80%931878)) (1877–1878).

In the 19th century the [beaver](/source/beaver) was hunted to extinction along the Danube in [Bavaria](/source/Bavaria).<ref>{{Cite web|url=https://www.economist.com/1843/2015/09/17/dam-it|title=Dam it!|author1=Isabella Tree|date=17 September 2015|publisher=The Economist}}</ref> The [Beluga sturgeon](/source/Beluga_(sturgeon)) population also collapsed, Danube sturgeons had been commercially exploited for meat and [caviar](/source/caviar) since the 5th century BC. River regulation schemes commenced in the 19th century and continued into the 20th century. The Danube river has a total of 18 major dams, including [Melk](/source/Melk) and Freudenau in [Vienna](/source/Vienna).<ref>{{Cite book|title=Rivers of Europe|editor1=Klement Tockner|editor2=Urs Uehlinger|editor3=Christopher T. Robinson|date=2009|publisher=Academic Press|isbn=9780080919089}}</ref>

===Second World War===
During the 2011 renovation of the [Margaret Bridge](/source/Margaret_Bridge), [Budapest](/source/Budapest), human remains were discovered. The mostly Jewish remains were victims of the [far-right](/source/far-right) [Arrow Cross Party](/source/Arrow_Cross_Party), who briefly governed Hungary from 1944.<ref>{{cite news |agency=The Associated Press|title=Hungary buries remains of Holocaust victims executed by Nazis on banks of the Danube River |url=https://nationalpost.com/news/world/hungary-buries-remains-of-holocaust-victims-executed-by-nazis-on-banks-of-the-danube-river |website=National Post |access-date=16 February 2022 |language=en |date=15 April 2016}}</ref>

==Economics==
===Drinking water===
Along its course, the Danube is a source of drinking water for about 20 million people.<ref>{{Cite web |title=About Us |url=https://www.icpdr.org/main/icpdr/about-us |access-date=5 February 2021 |website=International Commission for the Protection of the Danube River}}</ref><ref>{{Cite web|last=|first=|date=|title=Blue River|url=https://wwf.panda.org/discover/knowledge_hub/where_we_work/black_sea_basin/danube_carpathian/our_solutions/freshwater/danube_river_basin/?|url-status=live|archive-url=https://web.archive.org/web/20210412152545/https://wwf.panda.org/discover/knowledge_hub/where_we_work/black_sea_basin/danube_carpathian/our_solutions/freshwater/danube_river_basin/? |archive-date=12 April 2021 |access-date=5 February 2021|website=wwf.panda.org}}</ref> In [Baden-Württemberg](/source/Baden-W%C3%BCrttemberg), [Germany](/source/Germany), almost 30 percent (as of 2004) of the water for the area between [Stuttgart](/source/Stuttgart), [Bad Mergentheim](/source/Bad_Mergentheim), [Aalen](/source/Aalen) and [Alb-Donau (district)](/source/Alb-Donau_(district)) comes from purified water of the Danube. Other cities such as [Ulm](/source/Ulm) and [Passau](/source/Passau) also use some water from the Danube.

In [Austria](/source/Austria) and [Hungary](/source/Hungary), most water is drawn from ground and spring sources, and only in rare cases is water from the Danube used. Most states also find it too difficult to clean the water because of extensive pollution; only parts of Romania where the water is cleaner still obtain drinking water from the Danube on a regular basis.<ref>{{cite web |url=http://www.iawd.at/cms/pages/en/the-danube.php |title=The Danube |publisher=International Association of Water Supply Companies in the Danube River Catchment Area |access-date=28 July 2012 |archive-url=https://web.archive.org/web/20120519200631/http://www.iawd.at/cms/pages/en/the-danube.php |archive-date=19 May 2012 }}</ref>

===Navigation and transport===
[[File:Fischerzille LüA 10 m Donau bei Greifenstein Niederösterreich.jpg|thumb|right|Fishing from a [Zille](/source/Zille_(boat)) on the Danube in Lower Austria, 1982]]

In the 19th century, the Danube was an important waterway but was, as ''The Times'' of London put it, "annually swept by ice that will lift a large ship out of the water or cut her in two as if she were a carrot."<ref>{{Cite web|url=https://www.thetimes.com/|title=The Times & The Sunday Times|website=[The Times](/source/The_Times)}}</ref>

Today, as ["Corridor VII"](/source/Pan-European_corridors) of the [European Union](/source/European_Union), the Danube is an important transport route. Since the opening of the [Rhine–Main–Danube Canal](/source/Rhine-Main-Danube_Canal), the river connects the [Port of Rotterdam](/source/Port_of_Rotterdam) and the industrial centers of Western Europe with the [Black Sea](/source/Black_Sea) and, also, through the [Danube&nbsp;– Black Sea Canal](/source/Danube%26nbsp%3B%E2%80%93_Black_Sea_Canal), with the [Port of Constanța](/source/Port_of_Constan%C8%9Ba).

The waterway is designed for large-scale inland vessels ({{nowrap|110 × 11.45 m}}) but it can carry much larger vessels on most of its course. The Danube has been partly canalized in Germany (5 locks) and Austria (10 locks). Proposals to build a number of new locks to improve navigation have not progressed, due in part to environmental concerns.

Downstream from the [Freudenau](/source/Freudenau) locks in Vienna, canalization of the Danube was limited to the [Gabčíkovo dam](/source/Gab%C4%8D%C3%ADkovo_-_Nagymaros_Dams) and locks near Bratislava and the two double [Iron Gate](/source/Iron_Gates) locks in the border stretch of the Danube between Serbia and Romania. These locks have larger dimensions. Downstream of the Iron Gate, the river is free flowing all the way to the Black Sea, a distance of more than {{convert|860|km|mi}}.

The Danube connects with the Rhine–Main–Danube Canal at [Kelheim](/source/Kelheim), with the [Donaukanal](/source/Donaukanal) in Vienna, and with the Danube–Black Sea Canal at [Cernavodă](/source/Cernavod%C4%83).

Apart from a couple of secondary navigable branches, the only major navigable rivers linked to the Danube are the [Drava](/source/Drava), [Sava](/source/Sava) and [Tisa](/source/Tisza). In Serbia, a canal network also connects to the river; the network, known as the [Danube–Tisa–Danube Canal](/source/Danube%E2%80%93Tisa%E2%80%93Danube_Canal)s, links sections downstream.

In the Austrian and German sections of the Danube, a type of flat-bottomed boat called a [Zille](/source/Zille_(boat)) was developed for use along the river. Zillen are still used today for fishing, ferrying, and other transport of goods and people in this area.

===Fishing===
The importance of fishing on the Danube, which was critical in the [Middle Ages](/source/Middle_Ages), has declined dramatically. Some fishermen are still active at certain points on the river, and the [Danube Delta](/source/Danube_Delta) still has an important industry. However, some of the river's resources have been managed in an environmentally unsustainable manner in the past, leading to damage by pollution, alterations to the channel, and major infrastructure development, including large hydropower dams.<ref>{{cite book |last=Holcik |first=Juraj |date=1989 |title=The freshwater fishes of Europe Vol.I Part II General introduction to fishes|location=Wiesbaden |publisher=Aula Verlag}}</ref>

The [sturgeon](/source/sturgeon) stocks associated with the Danube river basin have, over the centuries, formed the basis of a large and significant commercial fishery, renowned throughout the world. The construction of the dams, besides overfishing and river pollution, has a significant role in sturgeon population decline because it creates a barrier for fish migratory species that usually spawn in the upper parts of the river.<ref>{{cite book |last1=Hensel |first1=K |last2=Holcik |first2=J |date=1997 |title=Past and current status of sturgeons in the upper and middle Danube River.|url=https://www.researchgate.net/publication/226596320}}</ref> The spawning areas of migratory fishes species has been dramatically reduced by the construction of hydropower and navigation systems at Iron Gates I (1974) and Iron Gates II (1984).<ref>{{cite web |author=Corda |date=1988 |title=Iron gates II design and performance of dams- geotechnical considerations |url=https://scholarsmine.mst.edu/cgi/viewcontent.cgi?article=1503&context=icchge |publisher=International Conference on Case Histories in Geotechnical Engineering |format=PDF}}</ref> The initial design of these dams has not included any fish passage facility.<ref>{{cite conference |url=https://www.danube-iad.eu/docs/IAD39_Proceeding_Book_lores.pdf |title=Have sturgeons a future in the Danube River? |author=Suciu Radu, Guti Gabor |year=2012 |conference=39th IAD Conference: Living Danube |location=Szentendre, Hungary }}</ref> The possibility of building a human-made [fish pass](/source/fish_pass) enabling migration for fish species including the sturgeon, is currently under review by projects such as We Pass.<ref>{{cite AV media |date= 11 November 2019 |title= We Pass – Facilitating Fish Migration and Conservation at the Iron Gates |language=en |url=https://www.youtube.com/watch?v=81i25THmBws |archive-url=https://ghostarchive.org/varchive/youtube/20211215/81i25THmBws |archive-date=15 December 2021 |url-status=live|publisher=ICPDR }}{{cbignore}}</ref>

The Upper Danube [ecoregion](/source/ecoregion) alone has about 60 fish species and the Lower Danube–[Dniester](/source/Dniester) ecoregion has about twice as many.<ref name=FEW>Hales, J. (2013). ''[http://www.feow.org/ecoregions/details/417 Upper Danube]''. Freshwater Ecoregions of the World. Retrieved 25 February 2013.</ref> Among these are an exceptionally high diversity of sturgeon, a total of six species ([beluga](/source/Beluga_(sturgeon)), [Russian sturgeon](/source/Russian_sturgeon), [bastard sturgeon](/source/bastard_sturgeon), [sterlet](/source/sterlet), [starry sturgeon](/source/starry_sturgeon) and [European sea sturgeon](/source/European_sea_sturgeon)), but these are all threatened and have largely–or entirely in the case of the European sea sturgeon–disappeared from the river.<ref name=FEW/> The [huchen](/source/huchen), one of the largest species of salmon, is [endemic](/source/Endemism) to the Danube basin, but has been [introduced](/source/Introduced_species) elsewhere by humans.<ref>{{FishBase | genus = Hucho | species = hucho | month = February | year = 2013}}</ref>

===Tourism===
[[File:Ruine Aggstein 03.JPG|thumb|right|The ruins of [Aggstein Castle](/source/Aggstein_Castle) above the Danube]]
[[File:Wachau (3).JPG|thumb|[Wachau Valley](/source/Wachau_Valley) near [Spitz, Austria](/source/Spitz%2C_Austria)]]
Important tourist and natural spots along the Danube include the [Wachau](/source/Wachau) Valley, the [Nationalpark Donau-Auen](/source/Nationalpark_Donau-Auen) in Austria, [Gemenc](/source/Gemenc) in Hungary, the [Naturpark Obere Donau](/source/Naturpark_Obere_Donau) in Germany, [Kopački rit](/source/Kopa%C4%8Dki_rit) in Croatia, [Iron Gate](/source/Iron_Gate_(Danube)) in Serbia and Romania, the [Danube Delta](/source/Danube_Delta) in Romania, and the [Srebarna Nature Reserve](/source/Srebarna_Nature_Reserve) in Bulgaria.

Also, leisure and travel cruises on the river are of significance. Besides the often frequented route between Vienna and Budapest, some ships even go from [Passau](/source/Passau) in Germany to the [Danube Delta](/source/Danube_Delta) and back. During the peak season, more than 70 cruise liners are in use on the river, while the traffic-free upper parts can only be discovered with canoes or boats.

The Danube region is not only culturally and historically of importance, but also important for the regional tourism industry due to its fascinating landmarks and sights. With its well established infrastructure regarding cycling, hiking, and travel possibilities, the region along the Danube attracts every year an international clientele. In Austria alone, there are more than 14 million overnight stays and about 6.5 million arrivals per year.<ref name="kaiserundkoenige">{{cite web|url=http://www.strassederkaiserundkoenige.at/fileadmin/user_upload/Brosch%C3%BCren/ARGE_Donau_%C3%96sterreich2013.pdf |title=Press release of the "ARGE Donau Österreich" |access-date=1 April 2014 |language=de |archive-url=https://web.archive.org/web/20140313154833/http://www.strassederkaiserundkoenige.at/fileadmin/user_upload/Brosch%C3%BCren/ARGE_Donau_%C3%96sterreich2013.pdf |archive-date=13 March 2014 }}</ref>

The Danube Banks in [Budapest](/source/Budapest) are a part of Unesco World Heritage sites, they can be viewed from a number of sightseeing cruises offered in the city.

The Danube Bend is also a popular tourist destination.

====Danube Bike Trail====
[[File:Donauradweg Schloegener Schlinge - Aschach.jpg|thumb|The Danube Bike Trail running along the ''Schlögener Schlinge'', a [water gap](/source/water_gap) in the [Bohemian Massif](/source/Bohemian_Massif)]]
[[File:LinzDonaulaende.jpg|thumb|The Danube Bike Trail leading through the city of [Linz](/source/Linz)]]
The [Danube Bike Trail](/source/Donauradweg) (also called Danube Cycle Path or the ''Donauradweg'') is a bicycle trail along the river. Especially the parts through Germany and Austria are very popular, which makes it one of the 10 most popular bike trails in Germany.<ref>{{cite web |title=''Die ADFC-Radreiseanalyse 2013'' – Zahlen, Daten und Fakten |url=http://www.adfc.de/radreiseanalyse/die-adfc-radreiseanalyse-2013 |access-date=12 March 2014 |language=de |archive-url=https://web.archive.org/web/20170618233337/http://www.adfc.de/radreiseanalyse/die-adfc-radreiseanalyse-2013 |archive-date=18 June 2017 }}</ref>

The Danube Bike Trail starts at the origin of the Danube and ends where the river flows into the Black Sea. It is divided into four sections:
#[Donaueschingen](/source/Donaueschingen)–[Passau](/source/Passau) ({{Convert|559|km|mi|abbr=on|disp=or}})
#[Passau](/source/Passau)–[Vienna](/source/Vienna) ({{Convert|340|km|mi|abbr=on|disp=or}})
#[Vienna](/source/Vienna)–[Budapest](/source/Budapest) ({{Convert|306|km|mi|abbr=on|disp=or}})
#[Budapest](/source/Budapest)–[Black Sea](/source/Black_Sea) ({{Convert|1670|km|mi|abbr=on|disp=or}})

====Sultans Trail====
The [Sultans Trail](/source/Sultans_Trail) is a hiking trail that runs along the river between [Vienna](/source/Vienna) and [Smederevo](/source/Smederevo) in Serbia. From there the Sultans Trail leaves the Danube, terminating in [Istanbul](/source/Istanbul). Sections along the river are as follows.
#[Vienna](/source/Vienna)–[Budapest](/source/Budapest) ({{Convert|323|km|mi|abbr=on|disp=or}})
#[Budapest](/source/Budapest)–[Smederevo](/source/Smederevo) ({{Convert|595|km|mi|abbr=on|disp=or}})

====Donausteig====
[[File:Donausteig Rastplatz.jpg|thumb|Resting area along the ''Donausteig'' hiking trail near [Bad Kreuzen](/source/Bad_Kreuzen)]]
In 2010, the [Donausteig](/source/Donausteig_(Danube_Trail)), a hiking trail from Passau to [Grein](/source/Grein%2C_Austria), was opened. It is {{convert|450|km|mi|sp=us|abbr=on}} long and it is divided into 23 stages. The route passes through five Bavarian and 40 Austrian communities. A landscape and viewpoints, which are along the river, are the highlights of the ''Donausteig''.<ref>{{cite web |title=Donausteig |url=http://www.traildino.com/trace/continents-Europe/countries-Austria/trails-Donausteig |website=Traildino.com |access-date=1 April 2014 |archive-date=7 April 2014 |archive-url=https://web.archive.org/web/20140407064821/http://www.traildino.com/trace/continents-Europe/countries-Austria/trails-Donausteig |url-status=dead }}</ref>

====The Route of Emperors and Kings====
The Route of Emperors and Kings is an international touristic route leading from [Regensburg](/source/Regensburg) to Budapest, calling in Passau, Linz and Vienna.<ref>{{Cite web|url=https://www.routeofemperorsandkings.com/|title=Welcome|website=Straße der Kaiser und Könige}}</ref> The international consortium ''ARGE Die Donau-Straße der Kaiser und Könige'', comprising ten tourism organisations, shipping companies, and cities, strives for the conservation and touristic development of the Danube region.<ref name="kaiserundkoenige" />

In medieval Regensburg, with its maintained old town, [stone bridge](/source/Stone_Bridge_(Regensburg)) and [cathedral](/source/Regensburg_Cathedral), the Route of Emperors and Kings begins. It continues to [Engelhartszell](/source/Engelhartszell_an_der_Donau), with the only [Trappist monastery](/source/Engelszell_Abbey) in Austria. Further highlight-stops along the Danube, include the "Schlögener Schlinge", the city of Linz, which was [European Capital of Culture](/source/European_Capital_of_Culture) in 2009 with its contemporary art richness, the [Melk Abbey](/source/Melk_Abbey), the university city of [Krems](/source/Krems_an_der_Donau) and the cosmopolitan city of Vienna. Before the Route of Emperors and Kings ends, you pass Bratislava and Budapest, the latter of which was seen as the twin town of Vienna during the times of the [Austro-Hungarian Empire](/source/Austria-Hungary).
Since [ancient Roman times](/source/Ancient_Rome), famous emperors and their retinue traveled on and along the Danube and used the river for travel and transportation. While traveling on the mainland was quite exhausting, most people preferred to travel by ship on the Danube. So the Route of Emperors and Kings was the setting for many important historical events, which characterize the Danube up until today.

The route got its name from the [Holy Roman Emperor Frederick I](/source/Frederick_I%2C_Holy_Roman_Emperor) of Barbarossa and the [crusaders](/source/Crusades) as well as from [Richard I of England](/source/Richard_I_of_England) who had been jailed in the [Dürnstein Castle](/source/Burgruine_D%C3%BCrnstein), which is situated above the Danube. The most imperial journeys throughout time were those of the [Habsburg family](/source/Habsburg_monarchy). Once crowned in [Frankfurt](/source/Frankfurt), the emperors ruled from Vienna and also held in Regensburg the [Perpetual Diet of Regensburg](/source/Perpetual_Diet_of_Regensburg). Many famous castles, palaces, residences, and state-run convents were built by the Habsburger along the river. Nowadays they still remind us of the bold architecture of the "Donaubarock".

Today, people can not only travel by boat on the Danube but also by train, by bike on the Danube Bike Trail or walk on the "Donausteig" and visit the [UNESCO World Heritage cities](/source/World_Heritage_Site) of Regensburg, [Wachau](/source/Wachau) and Vienna.<ref>{{cite web |title=The Route of Emperors and Kings |url=https://www.bavaria.by/the-route-of-emperors-and-kings |access-date=29 March 2014 |website=bavaria.by }}{{Dead link|date=August 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>

==Important national parks==
* Naturpark Obere Donau (Germany)
* Donauauen zwischen Neuburg und Ingolstadt (Germany) – [https://web.archive.org/web/20111023161527/http://danubemap.eu/donauauwald map]
* Nature protection area Donauleiten (Germany)
* Nationalpark Donau Auen (Austria) – [https://web.archive.org/web/20111023161522/http://danubemap.eu/donauauen map]
* Chránená krajinná oblasť Dunajské luhy (Slovakia) – [https://web.archive.org/web/20111021055315/http://danubemap.eu/dunajskeluhy map]
* [Danube-Ipoly National Park](/source/Danube-Ipoly_National_Park) (Hungary) – [https://web.archive.org/web/20111021055252/http://danubemap.eu/dunaipoly map]
* [Danube-Drava National Park](/source/Danube-Drava_National_Park) (Hungary) – [https://web.archive.org/web/20111023101801/http://danubemap.eu/dunadrava map]
* Naturalpark [Kopački Rit](/source/Kopa%C4%8Dki_Rit) (Croatia) – [https://web.archive.org/web/20111023110151/http://danubemap.eu/kopackirit map]
* [Gornje Podunavlje](/source/Gornje_Podunavlje) Nature Reserve (Serbia) – [https://web.archive.org/web/20111024011005/http://danubemap.eu/podunavlje map]
* [Fruška Gora](/source/Fru%C5%A1ka_Gora) National Park (Serbia)
* [Koviljsko-petrovaradinski rit](/source/Koviljsko-petrovaradinski_rit) Nature Reserve (Serbia)
* [Great War Island](/source/Great_War_Island) Nature Reserve (Serbia)
* [Đerdap National park](/source/%C4%90erdap_National_park) (Serbia)
* [Iron Gates Natural Park](/source/Iron_Gates_Natural_Park) (Romania)
* [Persina Nature Park](/source/Persina_Nature_Park) (Bulgaria) – [https://web.archive.org/web/20111023161537/http://danubemap.eu/persina map]
* [Kalimok-Brushlen Protected Site](/source/Kalimok-Brushlen_Protected_Site) (Bulgaria) – [https://web.archive.org/web/20111023110144/http://danubemap.eu/kalimok map]
* [Srebarna Nature Reserve](/source/Srebarna_Nature_Reserve) (Bulgaria) – [https://web.archive.org/web/20111024012109/http://danubemap.eu/srebarna map]
* [Măcin Mountains](/source/M%C4%83cin_Mountains) Natural Park (Romania)
* [Balta Mică a Brăilei Natural Park](/source/Balta_Mic%C4%83_a_Br%C4%83ilei_Natural_Park) (Romania)
* [Danube Delta](/source/Danube_Delta) Biosphere Reserve (Romania) – [https://web.archive.org/web/20111023101756/http://danubemap.eu/delta map]
* Danube Biosphere Reserve in Ukraine

<gallery widths="200px" heights="160px">
File:Gornje Podunavlje.jpg|[Gornje Podunavlje](/source/Gornje_Podunavlje) Special Nature Reserve in [Serbia](/source/Serbia)
File:Golubac Fortress (град Голубац).jpg|[Golubac Fortress](/source/Golubac_Fortress) in [Đerdap National park](/source/%C4%90erdap_National_park), Serbia
</gallery>

==In folklore and literature==
[[File:Albrecht Altdorfer 007.jpg|thumb|right|16th-century Danube landscape near [Regensburg](/source/Regensburg), by [Albrecht Altdorfer](/source/Albrecht_Altdorfer) – a member of the Danube school]]

* The Danube is mentioned in the title of a famous [waltz](/source/waltz) by Austrian composer [Johann Strauss](/source/Johann_Strauss_II), ''[The Blue Danube Waltz](/source/The_Blue_Danube_Waltz)'' (''On the Beautiful Blue Danube''). This piece is well known across the world and is also used widely as a [lullaby](/source/lullaby). ''[The Waves of the Danube](/source/The_Waves_of_the_Danube)'' ({{langx|ro|Valurile Dunării}}) is a waltz by the Romanian composer [Iosif Ivanovici](/source/Iosif_Ivanovici) (1845–1902); as the [Anniversary Song](/source/Anniversary_Song), it has been performed by many vocalists, such as [Al Jolson](/source/Al_Jolson), [Rosemary Clooney](/source/Rosemary_Clooney), [Vera Lynn](/source/Vera_Lynn), [Tom Jones](/source/Tom_Jones_(singer)), and countless others. It is most commonly known as the [Anniversary Waltz](/source/Waves_of_the_Danube), though that is actually a different song and melody. [Joe Zawinul](/source/Joe_Zawinul) wrote a [symphony](/source/symphony) about the Danube called ''[Stories of the Danube](/source/Stories_of_the_Danube)''. It was performed for the first time at the 1993 [Bruckner](/source/Anton_Bruckner) festival, at [Linz](/source/Linz).
* The Danube figures prominently in the [Bulgarian National Anthem](/source/Mila_Rodino), as a symbolic representation of the country's natural beauty. In Lithuanian folklore songs, the appearance of Danube (Dunojus, Dunojėlis) is more common than the appearance of the longest Lithuanian river [Neman](/source/Neman).
* The German and Austrian tradition of landscape painting, the [Danube school](/source/Danube_school), developed in the 16th century Danube valley by artists who worked autonomously.<ref>{{cite web|title=Danube School|url=https://www.oxfordreference.com/display/10.1093/oi/authority.20110810104721532|access-date=2025-06-07|publisher=Oxford Reference}}</ref>
* One of [Claudio Magris](/source/Claudio_Magris)'s masterpieces is called ''Danube'' ({{ISBN|1-86046-823-3}}). The book, published in 1986, is a large cultural-historical essay, in which Magris travels the Danube from the first sources to the delta, tracing the European ethnic and cultural heritage, literary and ideological history.
* ''The Great Danube Adventure'' was published in 1838 as epic travel diary.
* [Jules Verne](/source/Jules_Verne)'s ''[The Danube Pilot](/source/The_Danube_Pilot)'' (1908) (''Le Pilote du Danube'') depicts the adventures of fisherman Serge Ladko as he travels down the river.
* [Algernon Blackwood](/source/Algernon_Blackwood)'s short story "[The Willows](/source/The_Willows_(story))" mostly takes place on the river.

==See also==
{{Portal bar|Germany|Austria|Slovakia|Hungary|Croatia|Serbia|Bulgaria|Romania|Moldova|Ukraine}}
* [2006 European floods](/source/2006_European_floods)
*[Black Sea drainage basin](/source/Black_Sea_drainage_basin)
* ''[Between the Woods and the Water](/source/Between_the_Woods_and_the_Water)'', a travel book telling of a Danubian journey in 1934
* [Danube Monarchy](/source/Danube_Monarchy)
* [Danubian Principalities](/source/Danubian_Principalities)
* [Executive Agency for Exploration and Maintenance of the Danube River](/source/Executive_Agency_for_Exploration_and_Maintenance_of_the_Danube_River)
* ''[The Ister](/source/The_Ister_(film))'', 2004 film
* [List of cities and towns on the river Danube](/source/List_of_cities_and_towns_on_the_river_Danube)
* [List of crossings of the Danube](/source/List_of_crossings_of_the_Danube)

== Further reading ==
* Lóczy, Dénes. The Danube: Morphology, Evolution, and Environmental Issues. In Avijit Gupta, ed., Large Rivers: Geomorphology and Management. 2nd Ed. Hoboken, N.J.: Wiley-Blackwell, 2022, pp.&nbsp;335–367. ISBN 9781119412601
* Sommerwerk, Nike, Jurg Bloesch, Christian Baumgartner, Thomas Bittl, Dubravka Cerba, Bela Csanyi, Grigore Davideanu, Martin Dokulil, Georg Frank, Iulia Grecu, Thomas Hein, Vladimir Kovac, Ilulian Nichersu, Tibor Mikuska, Karin Pall, Momir Paunovic, Carmen Postolache, Maja Rakovic, Cristina Sandu, Martin Schneider-Jacoby, Katharina Stefke, Klement Tockner, Ion Toderas, and Laurentia Ungureanu. The Danube River Basin. In Klement Tockner, Christiane Zarfl, and Christopher T. Robinson (eds.), Rivers of Europe, 2nd Ed. Cambridge, MA: Elsevier, 2022, pp.&nbsp;83–181. ISBN 978-0-08-102612-0

==References==
{{Reflist}}

===Notes===
{{notelist}}

===Sources===
*{{cite web |last1= James |first1= Alan G.
 |year= 2020 |title= The Brittonic Language in the Old North, A Guide to the Place-Name Evidence, Volume 2
 |url= https://spns.org.uk/wp-content/uploads/2020/05/Alan_James_Brittonic_Language_in_the_Old_North_BLITON_Volume_II_Dictionary_2020_Edition.pdf
 |publisher= [Scottish Place-Name Society](/source/Scottish_Place-Name_Society) |access-date= 3 March 2024}}

*{{cite book |last1= MacKillop |first1= James |author-link= James MacKillop (author)
 |year= 2004 |title= Oxford Dictionary of Celtic Mythology |publisher= [Oxford University Press](/source/Oxford_University_Press) |isbn= 978-0198609674 }}

*{{cite book |last1= Noble |first1= Gordon |last2= Evans |first2= Nicholas
 |year= 2022 |title= The Picts: Scourge of Rome, Rulers of the North |publisher= [Birlinn](/source/Birlinn_(publisher)) |isbn= 978-1780277783 }}

*{{cite book |last1= Roberts |first1= Alice |author-link= Alice Roberts
 |year= 2015 |title= The Celts: Search for a Civilisation |publisher= [Heron Books](/source/Delphi_Schools) |isbn= 978-1784293321 }}
== Further reading==

* Mevissen, Robert Shields. '' The Danube Empire: An Environmental History of Habsburg State Building and Civic Engagement'' (2025)

==External links==
{{Wikivoyage}}
{{Commons}}
{{EB1911 poster|Danube}}
* {{OSM relation|89652}}
* [http://pdf.wri.org/watersheds_2000/watersheds_europe_p2_38.pdf Danube watershed map and information from the World Resources Institute]
* [http://danubepanorama.net/en/ Danube Panorama Project] {{Webarchive|url=https://web.archive.org/web/20110723073711/http://danubepanorama.net/en/ |date=23 July 2011 }}
* [http://danube.at.ua/ сайт о Дунае] {{in lang|ru}}
* [http://www.werow.com/en/guide/donau Danube and the sport of rowing]{{Dead link|date=August 2025 |bot=InternetArchiveBot |fix-attempted=yes }}
* [https://www.flickr.com/groups/danube_river/pool/ Danube image pool on Flickr]
* [http://www.danube-river.org/ Danube Tourist Commission] {{Webarchive|url=https://web.archive.org/web/20220206024032/http://www.danube-river.org/ |date=6 February 2022 }} {{in lang|de}}
* [https://www.icpdr.org/ International Commission for the Protection of the Danube River]
* {{usurped|1=[https://archive.today/20121209023104/http://www.bridgesofbudapest.com/ Bridges of Budapest over the river Danube]}}
* [http://www.thetimes.co.uk/tto/viewArticle.arc?articleId=ARCHIVE-The_Times-1877-06-14-12-001&pageId=ARCHIVE-The_Times-1877-06-14-12 Description of the Danube estuary in June 1877, ''The Times'' of London]{{dead link|date=April 2025|bot=medic}}{{cbignore|bot=medic}}
*[https://merhav.nli.org.il/primo-explore/search?query=any,contains,danube%20river&tab=default_tab&search_scope=Local&sortby=lso01&vid=NLI&mfacet=rtype,include,Maps,1&mfacet=tlevel,include,online_resources,1&mfacet=topic,include,Danube%20River,2&lang=en_US&came_from=sort Old maps of the Danube], Eran Laor Cartographic Collection, The [National Library of Israel](/source/National_Library_of_Israel)

{{Danube}}
{{Hydrography of Slovakia}}
{{Rivers of Germany}}
{{Rivers of Ukraine}}
{{Hydrography of Croatia}}
{{Authority control}}

Category:Danube
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Category:Articles containing video clips

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Adapted from the Wikipedia article [Danube](https://en.wikipedia.org/wiki/Danube) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Danube?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.
