Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12517-013-1006-2 |
Rate and budget of blown sand movement along the western bank of Lake Nasser, southern Egypt | |
Khedr, Ezzat1; Abou Elmagd, Kamal1; Halfawy, Mamdoh2 | |
通讯作者 | Abou Elmagd, Kamal |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES |
ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2014 |
卷号 | 7期号:9页码:3441-3453 |
英文摘要 | Three sets of Landsat (TM) satellite images for the years 1993, 1998, and 2003 show that the sand dunes at the southwestern Desert of Egypt are generally moving towards southeast direction with a mean annual creeping speed over ground attaining 15 m/year. The manual-stickled field measurements show that the net annual extension of the longitudinal dunes in the coastal area is between 4 and 5 m/year, while the inland longitudinal dunes showed a net movement ranging between 5 and 6 m/year. Seasonal variations of drift potential and sand movement refer to a strongly high energy wind desert environment in the spring season, high energy wind desert environment in the summer season, and relatively high to intermediate in the autumn and winter seasons, respectively. The total annual estimated volume of transported sand which falls down into Lake Nasser basin attains 16,225,808 m(3) as calculated by Bagnold’s equation and quantities of sand collected from the sand traps. Comparing this value with the total volume of Lake Nasser Basin, which attains 120 x 10(9) m(3), we can conclude that the sand sheets or sand accumulations may represent serious natural hazards to Lake Nasser in some locations. However, the sand drifting towards the lake may be obstructed by high contour topography hindrance, and the mean grain size of the sand sheets is bigger than 0.25 mm, which needs high wind velocity more than 4 m/s. In addition, the direction of the prevailing wind is N-NNW to S-SSE, and this direction sometimes is parallel to Lake Nasser in some places according to the meandering of the lake. The total lengths of hazardous areas along the western bank of Lake Nasser, which receive the most amounts of the drifted sands, attain 43.6 km only. |
英文关键词 | Blown sand Lake Nasser Natural hazards Potential drift Sand traps Wind energy |
类型 | Article |
语种 | 英语 |
国家 | Egypt |
收录类别 | SCI-E |
WOS记录号 | WOS:000340872000005 |
WOS关键词 | SEDIMENTS ; KUWAIT |
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/2XILL650/180796 |
作者单位 | 1.Aswan Univ, Dept Geol, Fac Sci, Aswan, Egypt; 2.High Dam Author, Aswan, Egypt |
推荐引用方式 GB/T 7714 | Khedr, Ezzat,Abou Elmagd, Kamal,Halfawy, Mamdoh. Rate and budget of blown sand movement along the western bank of Lake Nasser, southern Egypt[J],2014,7(9):3441-3453. |
APA | Khedr, Ezzat,Abou Elmagd, Kamal,&Halfawy, Mamdoh.(2014).Rate and budget of blown sand movement along the western bank of Lake Nasser, southern Egypt.ARABIAN JOURNAL OF GEOSCIENCES,7(9),3441-3453. |
MLA | Khedr, Ezzat,et al."Rate and budget of blown sand movement along the western bank of Lake Nasser, southern Egypt".ARABIAN JOURNAL OF GEOSCIENCES 7.9(2014):3441-3453. |
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