The mirror structure of fish life in the catchment area impacted by river currents

Abstract

The present invention relates to a kind of fish life mirror structure in the catchment area impacted by the river flow. A group of diversion dams are built near the entrance of the catchment area. The direction of the dam and the water flow is 30°‑45°. Several set positions on the main dam are separated by a certain distance, and the ladder dams protrude vertically to the side, and the protruding directions of the two adjacent ladder dams are opposite; on the inside of the diversion dam The catchment area is set as a bottom-shaping area, which includes waterways, bays, beaches, reef groups, and aquatic plant belts; the waterways are set between adjacent diversion dams, connected with the entire bay area, and connected with upstream and downstream currents. Connected, the depth is more than 1.5m lower than the water level in dry season. The present invention can effectively change the water flow situation, so that the water catchment area and the river channel can be kept unimpeded; effectively solve the problem of water flow impact in the flood season, and improve the water flow situation; the upper and lower water flow is smooth in the dry season, and the waterway inlet is connected, which is beneficial to the migration and habitat of fish; The arrangement of beaches and aquatic plants is beneficial to fish spawning and growth.

Description

technical field [0001] The invention relates to a fish biological mirror structure in a river impact catchment area, belonging to the technical field of fish biological resource protection. Background technique [0002] In many rivers in our country, due to the large change of water level, there are changes in dry season and flood season. In order to ensure the needs of waterways and water conservancy regulation, a large number of waterway dams and diversion dams have been built, resulting in changes in the river water flow during the flood period. Under the impact of strong water flow, a large number of impact catchment areas have been formed on the banks of the river. Before the impact, these areas were important channels and habitats for fish biological resources. Due to the formation of impact catchment areas, during the flood period, the water flow velocity in these areas is very high, there are many swirls and torrents, and fish cannot live and grow. In the dry seaso...

AI Technical Summary

Problems solved by technology

In the dry season, there will be a phenomenon of cut-off, which makes it impossible for migratory fish to pass through. At the same time, because the water flow cannot be connected and exchanged in the dry season, many fish organisms cannot spawn and reproduce. The risk of resources, etc. being fished

[0003] At present, the ecological environment protection of important fish biological resources in river waters is mainly carried out by means of resource protection, fishing control, proliferation and release at home and abroad. Around the impact of water conservancy projects, methods such as building fishways and laying fish nests are also mainly adopted. Research and application of fish habitat restoration in water impact areas

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