抄録
Sediment supply measures from the reservoir are required to reduce sedimentation and to preserve the downstream river bed environment. Then, we have been trying to develop the new sediment supply measures using the differential water head energy between upstream and downstream of the dam. We have proposed the burrowing type sediment removal suction pipe by laboratory experimental study. In this study, in order to obtain knowledge for the practical application of the pipe, we carried out the sediment discharge field test using the 200 mm diameter suction pipe at the actual very small reservoir located in the mountainous area. As a result, we understood the hydraulic characteristics such as a relationship between velocity in the pipe and the sediment concentration, a water head energy loss of the pipe and so on. It is confirmed that the burrowing type sediment removal suction pipe could be applied to remove non-cohesive sediment material without debris in a small reservoir.
