# Wadi Derna > Mediated Wiki article. Canonical URL: https://mediated.wiki/source/Wadi_Derna > Markdown URL: https://mediated.wiki/source/Wadi_Derna.md > Source: https://en.wikipedia.org/wiki/Wadi_Derna > Source revision: 1280135247 > License: Creative Commons Attribution-ShareAlike 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) {{Short description|Ephemeral river bed in Libya}} {{Infobox river | name = Wadi Derna | native_name = | name_other = | name_etymology = | nickname = | image = File:Derna 4.jpg | image_size = 300 | image_caption = Wadi Derna, January 2010 | image_alt = | map = File:Wadi Derna watershed.png | map_size = 300 | map_caption = Wadi Derna drainage basin ([https://mghydro.com/watersheds/shared/BE4508.html Interactive map]) | map_alt = | pushpin_map = | pushpin_map_size = | pushpin_map_caption= | pushpin_map_alt = | subdivision_type1 = | subdivision_name1 = | subdivision_type2 = | subdivision_name2 = | subdivision_type3 = | subdivision_name3 = | subdivision_type4 = | subdivision_name4 = | subdivision_type5 = | subdivision_name5 = | length = | width_min = | width_avg = | width_max = | depth_min = | depth_avg = | depth_max = | discharge1_location= | discharge1_min = | discharge1_avg = | discharge1_max = | source1 = | source1_location = | source1_coordinates= | source1_elevation = | mouth = [Mediterranean Sea](/source/Mediterranean_Sea) | mouth_location = | mouth_coordinates = {{coord|32.7672|22.6514|format=dms|type:river_region:LY|display=inline,title}} | mouth_elevation = | progression = | river_system = | basin_size = | basin_landmarks = | basin_population = | tributaries_left = | tributaries_right = | waterbodies = | waterfalls = [Derna waterfalls](/source/Derna_waterfalls) | bridges = | ports = | custom_label = | custom_data = | extra = |cities=[Derna](/source/Derna%2C_Libya)}} The '''Wadi Derna''' is a river valley in [Libya](/source/Libya) which leads down from the [Jebel Akhdar](/source/Jebel_Akhdar_(Libya)) mountains to the port city of [Derna](/source/Derna%2C_Libya). Like many other [wadi](/source/wadi)s in [North Africa](/source/North_Africa), it is an [intermittent](/source/ephemerality) [riverbed](/source/Stream_bed) that for much of its length contains water only when heavy [rain](/source/rain) occurs.{{cite news |last1=Mellen |first1=Ruby |last2=Karklis |first2=Laris |last3=Granados |first3=Samuel |last4=Ledur |first4=Júlia |last5=Stillman |first5=Dan |title=Mapping why Libya's floods were so deadly |url=https://www.washingtonpost.com/world/2023/09/12/deadly-libya-flooding-cause/ |access-date=13 September 2023 |newspaper=Washington Post |date=12 September 2023 |language=en}} It is {{convert|75|km|mi}} long{{cite book |author1=C.B.M. McBurney |author2=R.W. Hey |chapter-url=https://books.google.com/books?id=RyQ9AAAAIAAJ&dq=Derna+waterfalls+-wikipedia&pg=PA100 |via=books.google.co.uk |title=Prehistory and Pleistocene Geology in Cyrenaican Libya |chapter =VII, Tufaceous deposits |publisher=Cambridge University Press |isbn=9780521056243 |date=1955 |access-date=2023-09-14}} and drains a [drainage basin](/source/drainage_basin) of 575 km{{superscript|2}}. ==Derna waterfalls== The [Derna waterfalls](/source/Derna_waterfalls) are located in Wadi Derna about 7 km (4.3 mi) to the south of Derna.{{cite news |url=https://www.theguardian.com/world/2023/sep/12/destruction-in-derna-how-floods-ravaged-libyan-port-city |title=Destruction in Derna: how floods ravaged Libyan port city |author1=Alex Olorenshaw |author2=Faisal Ali |author3=Harvey Symons |author4=Glenn Swann |work=www.theguardian.com |date=2023-09-12 |access-date=2023-09-14}} == 2023 Derna catastrophe == {{Main articles|Derna dam collapses}} In September 2023, against the backdrop of [the civil war](/source/Libyan_civil_war), torrential rainfall from [Storm Daniel](/source/Storm_Daniel) led to the [collapse of two dams](/source/2023_Derna_dam_collapse)—the Derna dam and the downstream Abu Mansour dam—along the river, causing catastrophic flooding in the city of Derna and killing least 5,923 people.{{Cite web |date=2023-09-14 |title=Death toll hits 11,300 in Libyan city destroyed by floods |url=https://www.nbcnews.com/news/world/libya-floods-death-toll-derna-rcna105001 |access-date=2023-09-15 |website=NBC News |language=en}}{{cite web |title=Libya Assistance Overview, April 2024 |url=https://reliefweb.int/report/libya/libya-assistance-overview-april-2024 |website=ReliefWeb |publisher=USAID |access-date=2 May 2024}}{{cite web |url=https://reliefweb.int/report/libya/libya-flood-update-flash-update-no7-23-september-2023-4pm-local-time-enar |title=Libya: Flood update Flash Update No.7 (23 September 2023) (as of 4pm local time) [EN/AR] |work=reliefweb.int |date=24 September 2023 |access-date=26 September 2023}}{{cite web |last1=Akbarzai |first1=Salih |last2=Roth |first2=Richard |title=UN revises previous high Libya death toll |date=17 September 2023 |url=https://edition.cnn.com/2023/09/17/africa/un-revises-libya-death-toll/index.html |publisher=CNN |access-date=18 September 2023 |archive-date=18 September 2023 |archive-url=https://web.archive.org/web/20230918042804/https://edition.cnn.com/2023/09/17/africa/un-revises-libya-death-toll/index.html |url-status=live }} It was one of the deadliest [dam failure](/source/dam_failure)s in history. ==References== {{reflist}} {{Commons|}} {{DEFAULTSORT:Wadi Derna}} Derna --- Adapted from the Wikipedia article [Wadi Derna](https://en.wikipedia.org/wiki/Wadi_Derna) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Wadi_Derna?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.