Effect of the Cross Water Currents on the Representative Navigational ship in Egypt Validating Visual Modflow Numerical Model to Predict Future Impact of Brine Disposal on Groundwater Impact of dredging on the Nile River downstream Isna Barrage Morphological Changes in the Nile River in the Bridges Region Analytical Study of River Bed Morphological Change at the El-Menia Bridge Hydraulic Impact of Intake Slope and Entrance Level on Flow Uniformity Morphological Changes of the Nile River Reaches in Egypt after the Construction of the High Aswan Dam