干旱区生态环境知识资源中心(Arid): Flood-duration-integrated stream power and frequency magnitude of > 50-year-long sediment discharge out of a hyperarid watershed

Arid

DOI	10.1002/esp.5104
	Flood-duration-integrated stream power and frequency magnitude of > 50-year-long sediment discharge out of a hyperarid watershed
	Lekach, Judith; Enzel, Yehouda
通讯作者	Enzel, Y (corresponding author), Hebrew Univ Jerusalem, Fredy & Nadine Herrmann Inst Earth Sci, Edmond J Safra Campus, IL-9190401 Jerusalem, Israel.
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2021
卷号	46 期号:7 页码:1348-1362
英文摘要	Determining sediment discharge out of watersheds is a global, long-term challenge. In the vast, usually data-poor, hyperarid regions of the world, this is a greater challenge. Here, we present a unique, decades-long dataset of individual floods and their respective sediment discharge out of Nahal Yael, an experimental, well-instrumented, hyperarid (similar to 25-30 mm year(-1)) watershed in southern Israel. The high correlation between directly measured sediment yield by discrete individual floods and their respective total energy, represented by flood-integrated stream power (FISP), serves here as a rating curve. Using this rating curve, the 51-year-long series of FISP in Nahal Yael, calculated from the detailed individual flood hydrographs, was converted into a series of sediment yield by these floods. This, in turn, allows determining the long-term frequency-magnitude of sediment exported out of this hyperarid basin. This can assist in landscape evolution modeling, in testing impacts of flood frequency changes enforced by altered regional climatology, and hint at changes needed in forming the observed alluvial fans. We conclude that, at the decadal scale, moderate floods are the most effective in terms of total sediment transport. However, the recurrence intervals of these moderate hyperarid floods are longer than in temperate regions and reach 5-10 years.
英文关键词	alluvial fan arid bedload Dead Sea rift desert floods flood-integrated stream power geomorphic work hyperarid Negev sediment transport sediment yield
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000629326100001
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	Hebrew University of Jerusalem
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/349966
作者单位	[Lekach, Judith; Enzel, Yehouda] Hebrew Univ Jerusalem, Fredy & Nadine Herrmann Inst Earth Sci, Edmond J Safra Campus, IL-9190401 Jerusalem, Israel
推荐引用方式 GB/T 7714	Lekach, Judith,Enzel, Yehouda. Flood-duration-integrated stream power and frequency magnitude of > 50-year-long sediment discharge out of a hyperarid watershed[J]. Hebrew University of Jerusalem,2021,46(7):1348-1362.
APA	Lekach, Judith,&Enzel, Yehouda.(2021).Flood-duration-integrated stream power and frequency magnitude of > 50-year-long sediment discharge out of a hyperarid watershed.EARTH SURFACE PROCESSES AND LANDFORMS,46(7),1348-1362.
MLA	Lekach, Judith,et al."Flood-duration-integrated stream power and frequency magnitude of > 50-year-long sediment discharge out of a hyperarid watershed".EARTH SURFACE PROCESSES AND LANDFORMS 46.7(2021):1348-1362.