Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1130/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
![]() |
ISSN | 1553-040X |
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 |
推荐引用方式 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. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。