干旱区生态环境知识资源中心(Arid): Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia

Arid

DOI	10.1016/j.jhydrol.2019.124450
	Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia
	Grodek, Tamir 1; Morin, Efrat 1; Helman, David 2,3; Lensky, Itamar 4; Dahan, Ofer 5; Seely, Mary 6; Benito, Gerardo 7; Enzel, Yehouda1
通讯作者	Grodek, Tamir
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2020
卷号	582
英文摘要	Flood-fed aquifers along the sandy lower reach of the Kuiseb River sustain a 130-km-long green belt of lush oases across the hyperarid Namib desert. This oasis is a year-round source for water creating dense-tall woodland along the narrow corridor of the ephemeral river valley, which, in turn, supports human activity and fauna including during the long dry austral winters and multi-year droughts. Occasional floods, originating at the river's wetter headwaters, travel similar to 280 km downstream, before recharging these aquifers. We analyzed the flood-aquifer-vegetation dynamics at-a-site and along the river, determining the relative impact of floods with diverse magnitude and frequency on downstream reaches. We find that flood discharge that feeds the alluvial aquifers also affects vegetation dynamics along the river. The downstream aquifers are fed only by the largest floods that allow the infrequent germination of plants; mean annual recharge volume is too low to support the aquifers level. These short-term vegetation cycles of green-up and then fast senescence in-between floods are easily detected by satellite-derived vegetation index. This index identifies historical floods and their magnitudes in arid and hyperarid regions; specifically, it determines occurrences of large floods in headwater-fed, ephemeral Namib streams as well as in other hyperarid regions. Our study reveals the importance of flood properties on the oasis life cycle, emphasizing the impact of drought and wet years on the Namib's riparian vegetation.
英文关键词	Kuiseb River Namib desert Gobabeb Oasis valley Desert floods Aquifer recharge Vegetation dynamics Normalized Difference Vegetation Index (NDVI) Flood occurrence
类型	Article
语种	英语
国家	Israel ; Namibia ; Spain
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000517663700012
WOS关键词	VEGETATION ; RECHARGE ; EVAPOTRANSPIRATION ; GROUNDWATER ; CHEMISTRY ; BASIN
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
来源机构	Ben-Gurion University of the Negev ; Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314988
作者单位	1.Hebrew Univ Jerusalem, Fredy & Nadine Herrmann Inst Earth Sci, Edmond J Safra Campus, IL-91904 Jerusalem, Israel; 2.Hebrew Univ Jerusalem, Robert H Smith Fac Agr Food & Environm, Dept Soil & Water Sci, IL-76100 Rehovot, Israel; 3.Hebrew Univ Jerusalem, Adv Sch Environm Studies, IL-91509 Jerusalem, Israel; 4.Bar Ilan Univ, Dept Geog & Environm, IL-5290002 Ramat Gan, Israel; 5.Ben Gurion Univ Negev, Zuckerberg Inst Water Res, IL-84990 Sede Boqer, Israel; 6.Desert Res Fdn Namibia, 7 Rossini St, Windhoek, Namibia; 7.CSIC, Natl Museum Nat Sci MNCN, Madrid 28006, Spain
推荐引用方式 GB/T 7714	Grodek, Tamir,Morin, Efrat,Helman, David,et al. Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia[J]. Ben-Gurion University of the Negev, Hebrew University of Jerusalem,2020,582.
APA	Grodek, Tamir.,Morin, Efrat.,Helman, David.,Lensky, Itamar.,Dahan, Ofer.,...&Enzel, Yehouda.(2020).Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia.JOURNAL OF HYDROLOGY,582.
MLA	Grodek, Tamir,et al."Eco-hydrology and geomorphology of the largest floods along the hyperarid Kuiseb River, Namibia".JOURNAL OF HYDROLOGY 582(2020).