DEVICE FOR LIFTING AND DISCHARGING DEEP PART WATER OF DAM LAKE

摘要

PROBLEM TO BE SOLVED: To suppress deposit in a dam lake, protect beds of a downstream rivers and a sandy seashore, and particularly flow organic floating matters to a downstream river and the sea without damming them up, to improve habitat environment for aquatic organisms.;SOLUTION: A lower end water suction port of a water lifting pipe extending downward in the dam body inner wall surface of a dam lake is made to approach deposit or a dam lake bottom and to open, while an upper end of the water lifting pipe is connected and communicated to a discharge channel of a dam body head top of the dam lake or a discharge channel provided with a water utilization gate or a discharge gate of a dam body middle height. When a flood occurs or when discharging surplus water and utilized water, a water level difference or siphon phenomenon is utilized to lift and discharge deep part water of the dam lake. Thereby, a downstream range flow of the dam lake is changed to a deep layer flow directed to the water suction port of the water lifting pipe on a dam lake bottom, to guide the deposit to the water suction port, and the deposit is made to flow into the water lifting pipe and discharged together with discharge water to the outside of the dam lake.;COPYRIGHT: (C)2013,JPO&INPIT