Author(s): M. Moattassem Kotb; Kamal Wahba; Karima Atti; V. J. Galay
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Abstract: The construction of the High Aswan Dam on the River Nile has resulted in substantial changes to the flow and sediment regime of the river below the dam. The long-term monthly peak discharge of 8,430 m3/s has been reduced to a peak release of 2550 m3/s while the peak mean monthly silt concentration (suspended load) at Gaafra Gauging station (km 34, below Low Aswan Dam) has dropped fram 2800 ppm to 50 ppm. with these imposed changes it was anticipated that there would be changes to the bed and banks of the downstream river; the anticipated meander wavelength was computed to be about 3300 m. However, these anticipated dynamic changes to width and meander pattern of the River Nile have been surpassed by much more dynamic human interventions into the floodplain. The development of new croplands on islands and closed secondary channels, the construction of pumphouses, bridges, wharfs, brick fields and the dumping of rubble at towns has forced the river to take on a path that is, in some instances, not the one that the unhampered river would have taken. Examples are presented regarding the human interventions and the consequences to the river pattern. Dynamique de la plaine d ' inondation du Nil suite a la construction du haut barrage d ' Aswan
Year: 1989