Calibration of Movable Bed Model for Armant Areaby F. S. El-Gamal, Hydraulics & Sediment Research, Inst, Delta Barrage, Egypt,
A. F. Ahmed, Hydraulics & Sediment Research, Inst, Delta Barrage, Egypt,
Abstract: The morphology of the Nile River, in Egypt, is undergoing continuous changes which causes navigation bottle-necks in some local reaches. About 200 km downstream Aswan, at Armant area, the shallow water depths in the river bend caused a navigation difficulties for the ships sailing on Luxor-Aswan route. Because of the importance of this reach and because of the limited time available for the study of this problem, a desk study was conducted and a reliable temporary solution for the problem was recommended. The recommended solution was a dredging of navigation channel crossing the river width to connect between the deepest parts in the problem area. The navigation channel has a width of 100 m and has a length of 450 m, with a bed level of 67 m, above MSL, which gives a water depth of 2.3 m in the winter closure period. In the mean time, a mobile bed model was constructed to test different alternative solutions including the recommended one and regularly monitored the morphological changes in the area, to be informed when dredging will be needed again. Moreover, another objective of the mobile bed model, with its ability of predicting the morphological time scale is to select an optimal solution concerning cost for a safe navigation in this river bend. The main purpose of this paper is to introduce the technique used in both scaling of the processes involved and the calibration of the mobile bed model.
Subject Headings: Movable bed models | Navigation (waterway) | Calibration | Hydrologic models | Hydraulic models | Channel bends | Dredging | Rivers and streams | Africa | Egypt | Nile River
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