System for purifying lake water quality by utilizing biological diversity technology

Abstract

The invention discloses a system for purifying lake water quality by utilizing a biological diversity technology. According to the invention, a riparian vegetation belt is arranged on a lakeshore area and comprises riparian trees, shrubs planted below the riparian trees, and herbaceous plants or ground cover plants laid below the shrubs; the vertical cross section of a deep water area is a slope surface with a gradient; the mudflat of a part of lakeshore extends to the deep water area; exposed mudflat is retained; aquatic plants and leguminous plants are planted; the shore of an ecological island is densely planted with aquatic plants or shrubs; central trees are planted in the center of the ecological island; exposed mudflat is remained on the ecological island; and aquatic plants are transplanted on the lake surface of the center of the lake. Through the improvement of biological diversity, pollutants in water are taken out of the water through the food chain relationship of phytoplanktons like algae, zooplanktons, filter-feeding fishes, predacious fishes, birds and other animals; and through increasing and decreasing of the number and distribution of birds, a biological community structure in the water is changed, efficiencies and directions of migration and transformation of the pollutants are controlled, and the purpose of improving the water environment is achieved.

Description

technical field [0001] The invention relates to the technical field of ecosystem construction, in particular to a system and method for purifying lake water quality. Background technique [0002] With the rapid growth of population and economy in recent years, the severe situation of the water environment is not optimistic. Conventional physical and chemical water pollution control methods have been unable to meet the needs of sustainable development, especially for the treatment of regional rivers and lakes. The intake of pollutants (especially nutrients such as N and P) leads to excess nutrition in the water body, the increase of phytoplankton such as algae, the lack of DO (dissolved oxygen) in the water body, the water body becomes black and smelly, the water function is degraded, and the circulation of material and energy is blocked. The ecosystem has been destroyed, the biodiversity has been reduced, and the aesthetic and landscape value of the water body have been seri...

AI Technical Summary

Problems solved by technology

[0003] At present, the physical, chemical and biological methods of conventional water pollution control, such as river dredging technology, photocatalytic oxidation technology, biological filtration membrane technology, biological floating island technology, etc., are all improvements similar to biochemical technology, which do not have the systematic nature of ecological construction. Natural, easy to operate, and requires high hardware and labor costs, unnatural technology is prone to secondary pollution, the final effect is effective, and it is easy to cause a rebound in the ecological environment

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