2004 Volume 10 Pages 191-196
Comprehensive sediment management is needed to mitigate reservoir sedimentation for sustainable management of existing reservoirs. In this situation, appropriate sediment management techniques should be developed depend on the location in reservoirs and characteristics of deposited sediment. In recent years, a new technique that is to convey a part of coarse sediments excavated in the reservoir to the river below dams is developed and has been implemented in several dams. In those cases, placed sediments in the downstream river will be gradually eroded and transported to the sea during natural flood events.
In this paper, we focus on an example of the Sakuma dam in the Tenryu river basin. Characteristics of reservoir sedimentation in the Sakuma dam and effects of the sediment replenishment project to the downstream river are discussed.
