Abstract
Reservoir sedimentation is one of the most important problems for sustainable management of hydropower dams. Among several countermeasures, sediment sluicing is characterized in the sediment routing options which can be environmental friendly since it enables to pass through sediment from reservoir to downstream river mostly in natural flood events. Property of passing sediment can be classified depending on Depth of reservoir, Capacity-inflow and Capacity-sediment inflow ratios. In this study, the properties of hydropower dams which will define effects of sediment sluicing were analyzed such as relations of trap efficiency of reservoirs and the ratio of flood water depths above river bed and spillway crest elevation. For the case study, sediment sluicing effect was analyzed in two dam reservoirs by comparing sediment budget with 1D numerical model and economic analysis to evaluate all sediment management costs. These results showed the possibility that sediment sluicing can be installed in many hydropower dams.
