الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The Nile River is the main navigational route connecting the southern and northern parts of Egypt. In order to ensure safe and smooth navigation along rivers, navigational paths before being commissioned, are planned and de-signed according to the international rules of inland navigation. However, these paths, is subjected to hindrance in some locations due to climatic changes and morphological behaviour of the river. The water levels variations, sediment deposition, human interventions, and dynamic morphology of rivers are major causes of navigation problems. These causes affect the depth, width, and alignment of the navigation channel, which is counterproductive to the efficiency of the navigation path and causes navigation bottlenecks. To keep the river navigable, dredging used to maintain the navigational path. However, it has been found that repeated dredging processes cause bed dis-turbance that leads overtime to significant changes in the river behaviour.
The objective of the study is to obtain a sustainable navigational waterway system in Damietta branch. This is done by evaluating the navigation channel conditions along the Nile reach and analysing the impact of dredging opera-tions on the hydrodynamic and morphological characteristics of the river. Based on the different flow scenarios and their period of occurrence, the op-timum navigational draft is determined. It is allowed the passage of vehicles while avoiding or mitigating the frequency of dredging operations to preserve the morphology and hydrodynamics of the river.