الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The Nile River is the main route for inland navigation in Egypt. The vessels navigating through
inland waterways generate complex physical forces that need to be studied extensively. Quantifying the effects of vessels sailing along a waterway is a complex problem because the river flow is unsteady and the river bathymetry is irregular. This paper aims to investigate the
hydrodynamic effects resulting from the movement of vessels such as return currents around the vessel, the drawdown of the water surface, under keel clearance, and the shear stress
induced by vessels operating in the Nile River. Modeling such effects has been performed by applied the two-dimensional ADH (Adaptive Hydraulics) model to a river reach for different
navigation channel operation scenarios. The obtained results show that the drawdown heights, the water fluctuation, and the shear stress magnitude are larger when the river cross sectionals are narrow and the shallow water depths. These river sections are considered more disposed to bed erosion and it is morphologically unsafe. It is concluded that a numerical model is a
valuable tool for predicting and quantifying the hydrodynamic effects of vessels moving through a two-dimensional flow field and can be used to evaluate different scenarios that are difficult to measure in the field or a physical model. Also, it provides visualization products that help us understand the complicated forces produced by vessels moving in a navigation channel.