水力発電設備の持続的使用を目的としたダム湖土砂管理 -貯水池式発電所ダム湖における堆砂進行が発電運用に及ぼす影響-

Abstract

Reservoir sedimentation is one of the most important problems for securing long term achievement of hydropower plant operation in the future. We have already classified the sedimentation problems regarding the reservoir types and proposed effective sediment control measures for regulating reservoirs. On the other hand, sedimentation problems in storage reservoirs need to be more studied. In this paper, we have evaluated the influence of sedimentation progress in storage reservoirs on power generation by analyzing long-term operation record. Finally, future influence of reservoir sedimentation was predicted from the viewpoints of changing active storage capacity, inflow water regime and the maximum hydropower discharge.