Takeshi SATO

Study of Early Dam Discharge in Small and Medium-Scale Basin

Minjiao LU


Heavy rain was occurred in Niigata and Fukushima Prefecture on from 12th to 13th July 2004. We had many damages accompanying this heavy rainfall. When thinking about the defense of such a flood, the presence of the dam in the basin will possess great significance.

The objective of this study is to investigate the effect of early dam discharge at Ikarashi river basin (310.1km2) and Kariyata river basin (239.8km2).

The result, it was able to be confirmed to have reduced damage greatly by the existence of dams. Furthermore, it is shown that the dam did not overflow with the effect of the early dam discharge, and damage had been reduced. In conclusion, the early dam discharge was able to confirm to the flood the effective method it.