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Use of Remote Sensing for The Study of the Hazards of Ghard Abu Muharik Sand Dune Field, Western Desert, Egypt
| Content Provider | Semantic Scholar |
|---|---|
| Author | Gammal, El |
| Copyright Year | 2007 |
| Abstract | Ghard Abu Muharik dune field lies in the central part of the Western Desert of Egypt. It extends from the NE of the Baharia depression and runs in a southeastern direction to the depression of Kharga and further southward up to the Egypt-Sudan borders. The dune field is located in an important part of the region, where development plans are foreseen. Sustainable development in the Western Desert of Egypt can be impaired by hazards due to movements of dunes. This paper is a contribution for the study of generation, evolution and mobility of the northern (“tail” and “erg” sections) part of this field and its comparison to its southern part (“head” section of the field), which has been extensively studied by previous workers. Samples collected from the sand of the dunes have been subjected to XRD analysis, mechanical analysis. 3D DEM of some selected areas have been prepared for understanding the relation of the studied dune field to its surroundings. This gives clues to some aspects of the processes involved in the desertification of these regions and their relation to anthropomorphic activities. Different images acquired at different times (1974, 1984 and 2001) have been used to estimate the movements of single dunes, which proved to be directly proportional to dune sizes. The dunes increase in size and slow down southwards. They move at a speed of 25 m/year in the northern part of the field (near the part of the “erg” section of the field, adjacent to its tail, to the northeast of Bahariya) and at a speed of 12 m/year in the southern part of the “erg” section of the field, near the slope of the limestone plateau, which leads to the Kharga depression. The northern half of the part of the dune field includes many tracks and projects for asphalt roads to rely the Bahariya and Farafra oases to the Nile Valley. The paths of these roads should be carefully planed to avoid hazards caused by dune movements. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://icwrae-psipw.org/images/stories/2006/Environment/3.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
