抄録
In the recent years, there has been heavy rain near the Kakihara River and its basin, which is located in the southern part of Miyazaki City. Internal water damage occurred due to a decline in the river's flowing capacity and increased construction in the area. A sluiceway and drainage pumping station have been established in the lower area of the Kakihara River as a countermeasure against the internal water damage. However, the station encounters serious problems with regard to pumping the river water during heavy rains. For this reason, the flow of the river was interrupted where the Kakihara River and the Shimanda River meet at a right angle. As the result, the internal water damage occurred. Therefore, we have tried to control the river water with a training levee by using a hydraulic model experiment where the two rivers connect, adopting the style of the interchange of expressway. We succeeded in controlling the current of the river and also report a slight lessening of the internal water damage mentioned above.
