River and lake water flow impact catchment area fish habitat structure

Abstract

The invention relates to a river and lake water flow impact catchment area fish habitat structure. A set of diversion dikes are constructed near an inlet of a catchment area, the diversion dikes are in trapezoid shapes, and are composed of main dikes and trapezoid dikes, an angle between each diversion dike and a water flow direction is 30-45 degrees, in a plurality of set positions on the main dikes at intervals, the trapezoid dikes vertically extend to one side, and extending directions of each two adjacent trapezoid dikes are opposite; a bottom shaping area is arranged in the portion, on the inner sides of catchment area, besides the diversion dikes, and the bottom shaping area comprises water channels, bays, beaches, reef groups and an aquatic plant zone; and the water channels are arranged among the adjacent diversion dikes, communicated with all bay areas, communicated with upstream and downstream water flows, and lower than a water level of a dry season by more than 1.5 m. By means of the river and lake water flow impact catchment area fish habitat structure, water flow states can be effectively changed, so that the catchment area and a riverway are kept clear; the problem of flood period water flow impact is effectively solved, and the water flow states are improved; in the dry season, the upstream and downstream water flows are clear, and the water channels and the water bays are communicated, so that migration and inhabitation of fishes are benefited; and by arranging fishing reefs, bottomland and water plants, spawning and growth of the fishes are benefited.

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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