潜行吸引式排砂管の現地排砂実験による実用化に向けた検討

抄録

Sediment supply measures from a reservoir are required to reduce sedimentation and to preserve the downstream river bed environment. Then, we have been trying to develop a new sediment supply measures using the differential water head energy between upstream and downstream of a dam. We have proposed “the burrowing type sediment removal suction pipe method”. In this study, in order to obtain knowledge for practical application of the pipe, we carried out the sediment discharge field test using the 200mm and 300 mm diameter pipe at the actual reservoir. As a result, we understood the hydraulic characteristics, the applicability to the material, and the availability of the pipe. It was confirmed that the pipe could discharge sediment at almost the expected performance for reservoir material (almost non- cohesive debris-less sediment material).