ABSTRACT
The Nile River is the longest alluvial river in the world with more than https://www.w3.org/1998/Math/MathML"> 1500 k m https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429069246/b59e18fc-9e1d-4389-b000-a1069c1cd27e/content/eq11140.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> out of https://www.w3.org/1998/Math/MathML"> 6700 k m https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429069246/b59e18fc-9e1d-4389-b000-a1069c1cd27e/content/eq11141.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> runs through Egypt. Before the construction of any dam across its channel the Nile River was in a state of equilibrium. The natural hydrological regime of the Nile has two main features a low clear flow and a flood flow loaded with suspended matter which lasts for four months every year. While construction of the High Aswan Dam (HAD) has stopped concurrent flooding events, Nile River is still subjected to low intensity flood waves resulting from controlled release of water from dam reservoir. A 2 Dimensional hydro-morphological numerical model using the computer package CCHE has been set up to simulate flow and sediment transport processes for probable maximum flood releases in the https://www.w3.org/1998/Math/MathML"> 16 k m https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429069246/b59e18fc-9e1d-4389-b000-a1069c1cd27e/content/eq11142.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> long Nile River stretch from https://www.w3.org/1998/Math/MathML"> 104 K m https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429069246/b59e18fc-9e1d-4389-b000-a1069c1cd27e/content/eq11143.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> to https://www.w3.org/1998/Math/MathML"> 88 K m https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780429069246/b59e18fc-9e1d-4389-b000-a1069c1cd27e/content/eq11144.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> measured from Al Roda gauge downstream Assuit Barrage, the deposition rate is high in this reach and there are some islands so it is very important to study it. The model predicts processes of sediment deposition and erosion, changes in water level, change in navigation conditions, and thus new reservoir management practice is presented to help mitigate the impact of unwanted flood wave-release.
