Precipitation prediction methods developed by the Kansai Electric Power Co., Inc.

Abstract

In the Asahi Dam of the Kansai Electric Power Co., Inc., a sediment bypass system has been operated since 1998. It was constructed as drastic countermeasure facility for the long-term turbidity and the rapid sedimentation progression triggered by the hillside collapse due to the severe flood in 1990. Its effect on the long-term turbidity phenomenon and the dam sedimentation progression is confirmed. Basically, the sediment bypass is operated at the time of the flooding by considering the meteorological information or the flooding prediction. The Kansai Electric Power Co., Inc. is developing the meteorological prediction technology that contributes widely to the reliable operation of the bypass tunnels, and this paper introduces these technologies.