| abstract |
The utility model discloses an overflow weir with functions of water purification, ecological flow discharge and fish passing, which comprises an upstream weir body and a downstream weir body; The porous medium lead wire gabion is constructed, and its surface is provided with multi-stage fish passages connected end to end at intervals. The top connection line of the fish passage is streamlined, and the fish passage is covered with an anti-seepage blanket. Compared with the traditional overflow weir which only has a single water retaining function, the utility model has more diverse functions, the upstream weir body of the streamline structure can improve the water passing capacity, and the multi-level fish passages arranged on the downstream weir body have a certain energy dissipation capacity. It can reduce the scouring of the downstream river bottom, provide more space for fish migration, and reduce the leakage of water during storage; It has good application value in practical engineering. |