Restoration method of polluted lake

Abstract

The invention discloses a method for repairing a polluted lake. The method comprises the following steps: (1) firstly, detecting the contents of CODMn, ammonia nitrogen, total nitrogen and total phosphorus in the lake; (2) planting aquatic plant communities in the lake to be restored, wherein the aquatic plant communities comprise emergent aquatic plants, floating plants, submerged plants and floating plants; and (3) algae-eating insects, fishes and benthonic animals are put into the lake to be restored. By planting emergent aquatic plants, floating plants, submerged plants and floating plants according to the planting density, the vegetation coverage rate of the lake can be increased, and the purification effect on the lake can be improved through vegetation with the high coverage rate; various aquatic plants are planted in different areas, so that the requirements of different plants on illumination, water turbidity and water depth can be met; aquatic plant communities are planted in the lake, so that the water flow velocity can be slowed down, and the decomposition time of eutrophication substances by plants is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lake restoration, and in particular relates to a restoration method for polluted lakes. Background technique [0002] At present, most lakes have serious problems of pollution and eutrophication, so it is necessary to restore the ecology of lakes. The existing ecological restoration methods of lakes include physical methods, chemical methods and biological methods. [0003] The physical method is mainly to salvage pollutants manually, but the cost of manual salvage is huge and the maintenance time is short, which cannot completely solve the problem of water pollution; the chemical method is mainly to add bactericidal and algaecide to the water body, but this method will affect the ecological environment, not only The elimination of harmful fungi and algae will also affect the survival of other organisms, and the damaged lake ecosystem may cause another form of pollution if used for a long time; biological...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a repair method for polluted lakes, which solves the problem of the huge cost of manual salvage and short maintenance time in the prior art, the addition of bactericide and algicide affects the survival of other organisms, and the effect of adding microorganisms is obvious but the maintenance time is short And the technical issues that require long-term manual maintenance to build a new ecosystem

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