Construction method for near-natural reverse-osmosis biological wall in hydro-fluctuation belt of lake

Abstract

The invention provides a construction method for a near-natural reverse-osmosis biological wall in a hydro-fluctuation belt of a lake. The construction method comprises the following four parts with the distribution state of a plant community as a construction basis according to the time length of waterflooding: an area A: an arbor-shrub-herb belt, i.e., an arbor layer, a shrub layer and herbs; anarea B: a shrub-herb belt, i.e., a shrub layer and herbs; an area C: an emergent aquatic plant and floating plant area; and an area D: a submerged plant and biological wall area. By adoption of the construction method provided by the invention, emergent aquatic plants, floating plants and submerged plants in a water body show obvious gradient changes in ecological functions and visual effects; the plant community formed by combination of arbors, shrubs and herbs is formed in a revetment belt; an artificial floating island in the structure of the biological wall can move with the fluctuation of a water level, so the stability of the ecological system structure of the hydro-fluctuation belt is maintained; meanwhile, dense plant root systems form a layer of a natural biological filtration membrane, so the quality of water entering the lake is purified, and scouring of the water body to a revetment is buffered; and plants adopted for the floating island have good removal rate to pollutants like nitrogen, phosphorus and heavy metals in the water body.

Description

technical field [0001] The invention relates to a method for constructing a lake-fluctuation zone near a natural community, that is, constructing a multi-layer reverse osmosis biological wall to prevent and control pollutants from entering a lake, and belongs to the technical field of ecological environment management. Background technique [0002] Lake water-fluctuating zones exist at the junction of water bodies and land, and have obvious edge effects. They function as corridors, filters, and natural barriers for the logistics, energy flow, and biological flow of water and land ecosystems. However, due to the excessive use and unreasonable development of water resources by humans, their habitats have deteriorated, vegetation has been destroyed, biodiversity has declined, ecosystems have been damaged, and ecological and landscape functions have degraded. Due to the unstable soil structure in this area, it is difficult for most plants to adapt to the large fluctuations in wa...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problem of simple structure and function in the construction of revetment community in the existing lakeside area, and provide a kind of lake water-fluctuation zone close to natural reverse osmosis biological wall with various plant types, ecological function and landscape function. The construction method uses the mutual complementarity of aquatic and terrestrial plant populations to construct a near-natural composite plant community model to form a community with better stability and sustainability

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