| In our work on sediment supply measures using flexible suction pipes, we developed the “burrowing-type sediment removal suction pipe method”, which employs a U-bend flexible pipe with a water intake at the upstream end, an impermeable sheet and sediment suction holes at the bent part and the upstream part of the pipe. The suction pipe is initially set on the surface of deposited sediment. After the start of discharge, the pipe is expected to suck up sediment and gradually burrow into the sediment using the differential water head energy. In this paper, we explain the hydraulic characteristics of the burrowing type sediment removal suction pipe such as the relationship between the velocity in the pipe and the sediment concentration, and the water head energy loss of the pipe examined by experiments using a small size model (pipe diameter: 60 mm, sediment thickness: 0.8 m), a large size model (pipe diameter: 100 mm, sediment thickness: 2.0 m) and non-cohesive sediment materials. |
