Arid
DOI10.1130/GES00142.1
Rise and demise of the New Lakes of Sahara
Abdelsalam, Mohamed G.1; Youssef, Ahmed M.2; Arafat, Sayed M.3; Alfarhan, Mohammed4
通讯作者Abdelsalam, Mohamed G.
来源期刊GEOSPHERE
ISSN1553-040X
出版年2008
卷号4期号:2页码:375-386
英文摘要

Multispectral remote sensing data and digital elevation models were used to examine the spatial and temporal evolution of the New Lakes of Sahara in southern Egypt. These lakes appeared in September 1998, when water spilled northwestward toward the Tushka depression due to an unusual water rise in Lake Nasser induced by high precipitation in the Ethiopian Highlands. Five lakes were formed in local depressions underlain by an impermeable Paleocene shale and chalk formation. The lakes developed through three stages. (1) A rise stage occurred from September 1998 to August 2001; the area covered by the lakes reached similar to 1586 km(2). In this stage the rate of water supply far exceeded the rate of water loss through evaporation. This stage was characterized by an early phase (August 1998-August 1999) when the area covered by the lakes increased by similar to 75 km(2)/month. This was followed by a late phase (August 1999-August 2001), in which area increase averaged similar to 28 km(2)/month. (2) A steady-state stage occurred from August 2001 to August 2003, during which the area covered by the lakes remained relatively unchanged and water lost through evaporation was continuously replaced by water supply from Lake Nasser. (3) A demise stage occurred from August 2003 to April 2007, during which water supply from Lake Nasser stopped completely and water was continuously evaporating. The area covered by the lakes decreased to similar to 800 km(2) with an average loss of similar to 17 km(2)/month. If this trend continues, the New Lakes of Sahara will disappear completely by March 2011. The spatial distribution of the New Lakes of Sahara is strongly controlled by morphologically defined east-, north-, northeast-, and northwest-trending faults. The water recharge of the Nubian aquifer by the New Lakes of Sahara is insignificant; much of the lakes’ area is above an impermeable formation.


英文关键词New Lakes of Sahara Western Desert Egypt Nubian aquifer
类型Article
语种英语
国家USA ; Egypt
收录类别SCI-E
WOS记录号WOS:000254530200005
WOS关键词EGYPT
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/157499
作者单位1.Missouri Univ Sci & Technol, Dept Geol Sci & Engn, Rolla, MO 65401 USA;
2.Sohag Univ, Fac Sci, Dept Geol, Sohag, Egypt;
3.NARSS, Cairo, Egypt;
4.Univ Texas Dallas, Dept Geosci, Richardson, TX 75083 USA
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GB/T 7714
Abdelsalam, Mohamed G.,Youssef, Ahmed M.,Arafat, Sayed M.,et al. Rise and demise of the New Lakes of Sahara[J],2008,4(2):375-386.
APA Abdelsalam, Mohamed G.,Youssef, Ahmed M.,Arafat, Sayed M.,&Alfarhan, Mohammed.(2008).Rise and demise of the New Lakes of Sahara.GEOSPHERE,4(2),375-386.
MLA Abdelsalam, Mohamed G.,et al."Rise and demise of the New Lakes of Sahara".GEOSPHERE 4.2(2008):375-386.
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