Bank Erosion in the Low Water Course of the Uji River, a Main Tributary of the Yodo River

Bank erosion process of a low water course is being observed at a site in the Uji river, a main tributary of the Yodo river, by monitoring retreat of bank edge line and by inspecting survey data of cross sections. The erosion process has been compared with hydraulic conditions estimated from hydrological data of the nearest two gauging stations. Peak values of flood water stages and discharge have not affected clearly the bank erosion process, but bank heights above the adjacent bed proved to have a great influence on the retreat rates, reducing bank slope stability. Stability analysis of bank slopes at the site was conducted and their slip failures were predicted fairly well.