# Mumlava

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The **Mumlava** (German: *Mummel*) is a [mountain river](/source/Mountain_river) in the [Czech Republic](/source/Czech_Republic), a left [tributary](/source/Tributary) of the [Jizera](/source/Jizera_(river)) River. It flows through the [Liberec Region](/source/Liberec_Region). It is 12.6 km (7.8 mi) long. The river is known for the Mumlava Waterfall, which is the biggest waterfall in the Czech Republic.

## Etymology

The German name of the river is Mummel. It was derived from the word *mummeln*, i.e. 'mumble', referring to the sounds the river makes. The Czech name was created from the German name.[1]

## Characteristic

The Mumlava originates in the territory of [Vítkovice](/source/V%C3%ADtkovice_(Semily_District)) in the [Giant Mountains](/source/Giant_Mountains) at an elevation of 1,364 m (4,475 ft) and flows to [Harrachov](/source/Harrachov), where it enters the Jizera River at an elevation of 570 m (1,870 ft). It is 12.6 km (7.8 mi) long.[2] Its [drainage basin](/source/Drainage_basin) has an area of 51.6 km2 (19.9 sq mi).[3] The average discharge at its mouth is 1.98 m3/s (70 cu ft/s).[4]

The longest tributaries of the Mumlava are:[2]

Tributary Length (km) River km Side Milnice / Mielnica 6.8 1.6 right Ryzí potok 5.2 4.0 left Bílá voda 4.7 2.8 right

## Course

The river flows through the municipal territories of [Vítkovice](/source/V%C3%ADtkovice_(Semily_District)), [Rokytnice nad Jizerou](/source/Rokytnice_nad_Jizerou) and [Harrachov](/source/Harrachov). The upper course of the river (until its confluence with the Malá Mumlava Creek) is also called Velká Mumlava.

## Mumlava Waterfall

The river is known for the Mumlava Waterfall, which is the biggest and one of the most famous [waterfalls](/source/Waterfall) in the Czech Republic. It has a flow rate of 800 L/s and a height of 8.9 m (29 ft).[5] The Mumlava Waterfall is a popular tourist destination. It is located close to Harrachov and easy accessibility makes it the most visited waterfall in the country.[6]

The water flow has ground out the so-called [giant's kettles](/source/Giant's_kettle) in the [granite](/source/Granite) riverbed at the waterfall site. They are up to 2.9 m (9.5 ft) deep. In winter, the water stream sometimes freezes and creates an icefall.[7][8]

## Fauna

Only a minimum of animals live in the river. This is a natural condition, not caused by humans.[8]

## Tourism

The Mumlava is suitable for [river tourism](/source/Nautical_tourism). However, only the last four kilometres are accessible because of the river's location in the [Krkonoše National Park](/source/Krkono%C5%A1e_National_Park), and the river is only suitable for experienced paddlers.[9]

## See also

- [List of rivers of the Czech Republic](/source/List_of_rivers_of_the_Czech_Republic)
- [List of waterfalls](/source/List_of_waterfalls)

## References

1. Pilous, Vlastimil (2011). ["Vodopády: Mumlavský vodopád"](https://krkonose.krnap.cz/apex/f?p=104:4:::NO:RP,4:P4_ID,P4_CP:2011-07-15,2) (in Czech). *Krkonoše – Jizerské hory*. **7**: 20–21. [Krkonoše National Park](/source/Krkono%C5%A1e_National_Park). Retrieved 2024-12-10.

1. ["Vodní toky"](https://mapy.chmi.cz/ords/chmi_app/r/fewshlprf/stream-list?) (in Czech). *Evidence hlásných profilů*. [Czech Hydrometeorological Institute](/source/Czech_Hydrometeorological_Institute). Retrieved 2024-12-10.

1. ["Povodňový plán města Harrachov: Hydrologické údaje"](https://www.edpp.cz/har_hydrologicke-udaje/) (in Czech). *Elektronický digitální povodňový portál*. Retrieved 2024-12-10.

1. ["Evidenční list hlásného profilu č.63"](https://hydro.chmi.cz/hppsevlist/download?seq=20214815) (in Czech). [Czech Hydrometeorological Institute](/source/Czech_Hydrometeorological_Institute). Retrieved 2024-12-10.

1. ["Nejvyšší a největší vodopády ČR"](https://www.rekordy-prirody.cz/nejvyssi-a-nejvetsi-vodopady-cr/) (in Czech). *Rekordy přírody*. 2017-06-07. Retrieved 2024-12-10.

1. ["Mumlavský vodopád v Harrachově je v tuzemsku nejnavštěvovanější"](https://www.novinky.cz/clanek/vase-zpravy-mumlavsky-vodopad-v-harrachove-je-v-tuzemsku-nejnavstevovanejsi-40197268) (in Czech). *Novinky.cz*. 2018-09-08. Retrieved 2024-12-10.

1. ["Mumlavský vodopád v Krkonoších"](https://www.kudyznudy.cz/aktivity/mumlavsky-vodopad-v-krkonosich) (in Czech). CzechTourism. Retrieved 2024-12-10.

1. ["Naučná stezka Živá mrtvá Mumlava"](https://www.krnap.cz/media/l30f3lrx/krnap_brozura_naucne_stezky-2_w.pdf) (in Czech). [Krkonoše National Park](/source/Krkono%C5%A1e_National_Park). pp. 34–37. Retrieved 2024-12-10.

1. ["Mumlava – čistokrevná creekovačka"](https://www.padler.cz/vodacky-pruvodce/mumlava-cistokrevna-creekovacka/) (in Czech). Pádler. Retrieved 2024-12-11.

## External links

- [River flow at Janov – Harrachov station](https://hydro.chmi.cz/hppsoldv/hpps_prfdyn.php?seq=20214815) – Flood Warning and Forecasting Service of the [Czech Hydrometeorological Institute](/source/Czech_Hydrometeorological_Institute)

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