Abstract
Recently the slit sabo dam has become the mainstream in the construction of various types of sabo dams because it dose not usually trap and retain, but rather releases sediment and earth nutrients that the down stream area needs. The slit sabo dams control a large quantity of sediment which is liable to bring about disasters when storms occur. In recession periods, the slit sabo dams, however, could release more sediment than expected. Appropriately designed slit sabo dams at river bends would be able to increase checked sediment to give stable sediment control. A hydraulic model experiment was carried out to see how the location and structure of a slit sabo dam constructed in a bend of Joganji River contributes to sediment control. Through the experiments, it was made clear that a slit sabo dam constructed at the downstream end of a bend with a slit prepared on the inner side of the sabo dam is more effective for sediment control than that with a slit on the outer side.
