淀川における河川遡上津波発生時の三次元塩水挙動解析

抄録

If Tonankai and Nankai earthquakes occur, the associated tsunami will reach Osaka about 2 hours after the earthquakes and ascend Yodo river in Osaka to the upstream part of the Yodo river weir, approximately 10 km away from its river mouth. At the same time, the salt water would arrive there.

This study aims to simulate the salt water behavior at the upstream part of the Yodo river weir and calculate a concentration of salt at the front of the intakes of the water treatment plants there. The three and the two dimensional salt water behavior model are applied to the Yodo river. As a result, it is found that the tsunami brings a high concentration of salt to the front of Kunijima water intake.