射流河川における超過洪水に対応した分流施設の水理検討

抄録

Recently, flood and sediment disasters in small river basins have been increasing in number due to local heavy rainfall. As record making rainfalls also have occurred in many areas, adaptation to floods exceeding the design level becomes critical point of view in planning and designing flood and sediment control facilities.

In this paper, it is studied on the structure of the diversion facility adaptable to floods exceeding the design level in along the super-critical flow river through hydraulic analysis with the model experiment. The dimensions the diversion facility were fixed according to the experiment result to keep the diversion discharge as little as possible without human operation in the case that the discharge more than the design flood flows into the diverted channel.

Considering that the diversion point is located in the residential area, noise distribution caused by diversion was also simulated based on the model experiment.