FLOOD SIMULATION OF THE SENDAI RIVER AT THE DISASTER OF 2006 AND INVESTIGATION OF EFFECTS OF THE SHIGOME DIVERSION CHANNEL

Abstract

From July 15 to 24, a front stagnated over Japan, and the heavy rainfall was brought. Especially the Sendai River basin was severely and uniformly damaged from the upstream to the downstream. At four observatory stations, water level of the Sendai River exceeded the design high water level. Around the Torai area, one of the most severely damaged areas, a diversion channel is planned to construct. Therefore in this study, applying a two-dimensional numerical model, flood simulation is conducted in the Sendai River and the effect of this diversion channel is investigated. As the results, though a part of the water level of the Sendai River is not expressed successfully, it is found that this diversion channel has an effect of decreasing the water level around Torai area.