Fish passing system for water conservancy project of intercepting dam

Abstract

The invention discloses a fish passing system, and particularly discloses the fish passing system for a water conservancy project of an intercepting dam, and belongs to the technical field of design and construction of water conservancy and hydropower engineering buildings. The system has the advantages that the operation is stable, and is used for applying to the fish passing system for the waterconservancy project of the intercepting dam with a small water flow, and a shallow water level of a reservoir area and a relatively small water storage capacity; the fish passing system comprises anintercepting retaining dam, and further comprises a fish attracting and capturing mechanism and a transportation mechanism; a migratory fish group located in a river channel at the downstream side ofthe intercepting retaining dam are collected by an ecological water introduced by the fish attracting and capturing mechanism, and the attracted and captured migratory fish group is conveyed to the river channel at the upstream side of the intercepting retaining dam through the transportation mechanism.

Description

technical field [0001] The invention relates to a fish passing system, in particular to a fish passing system used in water conservancy projects of intercepting dams, and belongs to the technical field of design and construction of water conservancy and hydropower engineering buildings. Background technique [0002] A fishway is a channel for fish to migrate. In popular language, some fishes have the habit of migrating from the lower reaches of the river to the upper reaches of the river to spawn. When the river is cut off due to human reasons such as the construction of a dam, the passage for the fish to migrate upstream will be destroyed. . In order to protect the habits of fish, it is necessary to build an artificial tank across the dam as a passage for fish to migrate, which is called a fishway. The water flow enters the fishway from the upstream and flows out of the fishway from the downstream, but the fish enters the fishway from the downstream and swims out of the f...

AI Technical Summary

Problems solved by technology

The main disadvantages of this structure are: 1. The outlets of the fishways are all arranged upstream, and the length along the river is relatively long. The corresponding excavation or concrete works are relatively large, and the investment in the fishway project is relatively large; 2. The number of fishway outlets is relatively large. There are many, and it is necessary to open and close each gate in time according to the upstream water level. When the upstream water level changes greatly and frequently, the operation control of the fishway exit gate is also relatively cumbersome.

The main disadvantages of this structure are: 1. In order to meet the requirements of water level variation, multiple fishway outlets need to be set up along the dam axis in the upstream, which cannot be applied to retaining dams in narrow valleys; 2. Since each fishway outlet needs to be equipped with 1 It is necessary to open and close each gate in time according to the upstream water level. When the upstream water level fluctuates greatly and frequently, the operation control of the fishway exit gate is also relatively cumbersome.

However, it is not suitable for some small-scale projects with small water flow, shallow water level in the reservoir area, and relatively small water storage capacity.

Images