Ecological environment remediation method for lower reaches of mountainous dams

Abstract

The invention relates to the technical field of ecological remediation, in particular to an ecological environment remediation method for lower reaches of mountainous dams. The method comprises stepsof cultivation of submerged plants in a river, modification of river bank biodiversity, establishment of vegetation communities along banks and culture of fish baits. Mixed submerged plant communitiesof potamogeton malaianus and potamogeton cripsus are formed in the river, biotic communities are established on the banks, and the soil environment is optimized by use of a nanomaterial composite adsorbent and microorganisms; natural baits are provided for fishes and shrimps in the river, the water and soil retention capacity of the river is enhanced, the probability that the banks are destroyedby rush of river water is reduced, the ecological environment is optimized, activity and propagation of organisms in soil are promoted, and protection of local aquatic organism communities is facilitated.

Description

technical field [0001] The technical field of ecological restoration of the present invention, in particular, relates to a method for restoring the ecological environment of a river section downstream of a dam in a mountainous area. Background technique [0002] In the current social development, in order to maximize the use of natural resources, a large number of dams have been built, which has benefited the development of the regional economy. However, in addition to changing the water cycle of the basin, the construction of dams will also cause many specific changes in the ecological environment. Even induce a variety of disasters. The long-term water storage of the dam will also release floods from time to time, causing the impact force of the downstream river section to be far greater than its bearing capacity, resulting in more accidents of river section collapses. This will not only destroy the vegetation in the river section, but also cause greater losses to the vil...

AI Technical Summary

Problems solved by technology

As a result, the valuable biodiversity of the river is reduced, and the entire downstream biological function is lost, resulting in a fragile ecosystem, reduced self-purification capacity, and more likely to cause water pollution

[0003] In the current technology, there are many studies on improving the water quality of rivers using biotechnology. For example, the patent No. CN201210104317 is a biological chain construction method suitable for improving the water quality of shallow lakes. The species in the biological chain is single and does not have good environmental resistance; Another example is CN201711442853, a submerged plant fixation planting method suitable for mountainous rivers, which is limited to the improvement of water areas. For the water and soil conservation of river banks, the improvement of ecological environment along the river is limited; another example is CN201410631759. A artificial wetland treatment system suitable for diversion and purification of rivers entering lakes in the northern region. The improvement is limited to the combination of macro species. The degree of attention to the microenvironment of the macro plant root system is not enough, and it cannot solve the side effects caused by long-term planting species allelopathy

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