Evaluating Spur Dike Performance in Sharp Bends in Bahr Youssef Canal

The optimization of flow conditions in river bends is an important issue in maintaining thestability and efficiency of waterways. Spur dikes play a significant role in this context by influencing flowpatterns and controlling scour, particularly in meandering rivers. In recent years, spur dikes have emergedas a promising alternative for effective and efficient scour control, which can deflect or repel the flow toreduce erosion. This study aims to compare the effectiveness of different attractive spur dike designs inimproving flow patterns in a sharp bend in the natural Bahr Yousef canal. The study will utilize 2Dnumerical modeling (Delft3D FM Model) to simulate the flow patterns under different heights (ratio fromwater depth), and orientation angles of attractive spur dikes at the maximum flow condition. The results ofthis comparative analysis will provide valuable insights into the optimal design of spur dikes for enhancingflow conditions inside the bend. The results revealed that velocity was influenced by changing theparameters of the design of spur dikes, by varying trends observed for different configurations. The resultsindicated that the height ratio of 0.75 water depth provided an optimal balance between flow deflectionand sediment transport efficiency. Additionally, increasing the spur dike length further reduced the depthaverage velocity across the bend. Consequently, the best spur dike configuration was 35% length with aheight ratio of 0.75 at the angle of 110° with flow direction. The findings highlighted the importance ofconsidering length, height, and angle when designing spur dikes to optimize their efficiency in controllingvelocity in meandering canals. This research is important for improving the understanding of flow patternsin a sharp bend and developing effective mitigation strategies to ensure the stability of the waterway.