Numerical Study of The Effect of Spur Dike’s Permeability on Erosion and Sedimentation Patterns in a 90° Mild Bend Using the CCHE2D Model

Rivers are considered as one of the main sources of water and energy for human beings, and are considered as the aorta of human societies. Protecting the river bank against the erosion and degradation caused by the water flow, using various types of flow control structures is considered as a common method in river engineering science. One of the most important flow control structures is spur dikes that divert the flowing attack from the sides and critical areas and direct the flow towards the central axis of the river. Several researches have been conducted concerning the effect of spur dikes in protecting the river bank in bends such as: Barbhuiya and Dey (2004), Nasrollahi et al. (2008), Zhang et al. (2009). The purpose of the present study is to study the flow and sediment pattern in a 90-degree mild bend, with and without spur dikes with different permeability percentages.