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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
earth and planetary sciences
Evaluation of the crustal deformations in the northern region of Lake Nasser (Egypt) derived from 8 years of GPS campaign observations
Journal of Geodynamics, Volume 49, No. 3-4, Year 2010
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Description
The proper evaluation of crustal deformations in the Aswan (Egypt) region is crucial due to the existence of one major artificial structure: the Aswan High Dam. This construction induced the creation of one of the major artificial lakes: Lake Nasser, which has a surface area of about 5200 km2 with a maximum capacity of 165 km3. The lake is nearly 550 km long (more than 350 km within Egypt and the remainder in Sudan) and 35 km across at its widest point. Great attention has focused on this area after the November 14, 1981 earthquake (ML = 5.7), with its epicenter southwest of the High Dam. In order to evaluate the present-day kinematics of the region, its relationship with increasing seismicity, and the possible influence of the Aswan High Dam operation, a network of 11 GPS sites was deployed in the area. This network has been reobserved every year since 2000 in campaign style. We present here the results of the analysis of the GPS campaign time-series. These time-series are already long enough to derive robust solutions for the motions of these stations. The computed trends are analyzed within the framework of the geophysical and geological settings of this region. We show that the observed displacements are significant, pointing to a coherent intraplate extensional deformation pattern, where some of the major faults (e.g., dextral strike-slip Kalabsha fault and normal Dabud fault) correspond to gradients of the surface deformation field. We also discuss the possible influence of the water load on the long-term deformation pattern. © 2009 Elsevier Ltd. All rights reserved.
Authors & Co-Authors
Rayan, Ali
Egypt, Helwan
National Research Institute of Astronomy and Geophysics, Cairo
Fernandes, R. M.S.
Portugal, Covilha
Universidade da Beira Interior
Netherlands, Delft
Delft University of Technology
Khalil, H. A.
Egypt, Helwan
National Research Institute of Astronomy and Geophysics, Cairo
Mahmoud, Salah M.
Egypt, Helwan
National Research Institute of Astronomy and Geophysics, Cairo
De Miranda, Jorge Miguel Alberto
Portugal, Lisbon
Faculdade de Ciências, Universidade de Lisboa
Tealab, Alaa A.
Egypt, Helwan
National Research Institute of Astronomy and Geophysics, Cairo
Statistics
Citations: 13
Authors: 6
Affiliations: 4
Identifiers
Doi:
10.1016/j.jog.2009.10.010
ISSN:
02643707
Research Areas
Environmental
Study Locations
Egypt
Sudan