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Gravity field of Lake Nasser, Egypt deduced from marine gravity survey and satellite altimeter data

Authors

Issawy,  Elsayed
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Zahran,  Khaled
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

El-Qady,  Gad
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Abdelaziz,  Ali
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Elawadi,  Eslam
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Issawy, E., Zahran, K., El-Qady, G., Abdelaziz, A., Elawadi, E. (2023): Gravity field of Lake Nasser, Egypt deduced from marine gravity survey and satellite altimeter data, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-1812


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017775
Abstract
Lake Nasser, which was formed as a result of the construction of the High Dam, located in southern Egypt and Northern Sudan with a length of 500 km and a storage capacity of about 133.8 km 3. The seismic activity recorded in this region clearly indicates its connection with a tectonic pattern in the earth’s crust, in addition to the change in the water level in the lake according to its annual water cycle for charging and unloading, which leads to breaking the equilibrium state in the lake by changing the weight of the lake resulting from the change in the water level and sediments accompanying it. Thus, the process of monitoring and evaluating alluvial sediments along the lake is of great importance because of its impact on the storage capacity of the lake as well as the navigational path of the lake in addition to the economic importance of these sediments. The availability of accurate gravitational data for Lake Nasser greatly contributes to determining the subsurface geological structures and stratigraphic sequences (depth of the base rocks and the thickness of the alluvial deposits at the bottom of the lake).&nbsp; <p>On the current research, high resolution marine gravity survey has been conducted along the main course of the Lake.&nbsp; Moreover, satellite altimeter data has opened new perspectives on determining the gravity field on the marine region. Therefore, satellite altimeter data has been utilized as integration with the marine gravity survey to evaluate the whole gravity field of the Lake.