2016 Volume 22 Pages 7-12
The flood management in dam reservoirs has been performed by using the condition that a water level observed near the dam body holds uniformly everywhere in the reservoirs. However, floods in dam reservoirs flow down transforming a water-level and a discharge by flows in three-dimensional reservoirs. For efficient and safe dam reservoir management, it is necessary to establish the evaluation method of inflow and outflow discharges considering the mechanism of water storage, and three-dimensional flow structures in dam reservoirs. In this study, the quasi-three dimensional numerical model for explaining three-dimensional flow features was applied to the Kusaki dam reservoir. The evaluation method of inflow and outflow discharges based on the numerical model and observed temporal changes in flood water surface profiles was proved to be valid.
