Method for constructing ecological regulation and storage lake for urban rivers

Abstract

The invention discloses a method for constructing an ecological regulation and storage lake for urban rivers, wherein the ecological regulation and storage lake is mainly used for flood regulation andstorage of urban rivers and purification of river course water seriously polluted by resident living and agriculture. According to the main technical scheme, a regulation and storage lake composite water ecosystem is constructed, wherein the constructing method comprises six sub-projects, the six sub-technologies respectively comprises: basement improvement, submerged plant community construction, fish community construction, macrozoobenthos community construction, micro-ecological purification system construction and system optimization adjustment, wherein the submerged plant community as the primary producer is the core part of the water ecosystem; and at the late stage, the optimization adjustment measures are performed by monitoring and observing the system, such that the regulation and storage lake ecosystem is gradually converted into the stable and natural state, and finally the stable regulation and storage lake water ecosystem is formed so as to achieve the state comprising stable and diversified species community, clear water body and good landscape for a long time.

Description

technical field [0001] The invention relates to river ecology, environmental engineering, flood control engineering and landscape design. Background technique [0002] A lake is a relatively closed natural depression on the surface that can store water and the water it contains. Lakes in the city have important functions such as regulating runoff, preventing floods and reducing disasters, maintaining urban biodiversity, regulating urban temperature and humidity, replenishing urban groundwater, purifying the environment, reducing noise, and beautifying the city. [0003] The rainwater collection area of ​​lakes in the city is often large, while the water crossing section of the upstream river channel is small, which makes the river channel flow capacity seriously insufficient. Floods often overflow the river channel during the flood season, and the disaster prevention and mitigation capabilities of the city and its surrounding areas are greatly weakened. At present, the meth...

AI Technical Summary

Problems solved by technology

Organic and inorganic pollutants on suspended solids aggravate water pollution

Suspended solids make the water turbid, reduce the transparency, affect the photosynthesis and respiratory metabolism of aquatic organisms, and deteriorate the water quality. When the temperature rises, the water will turn blue-yellow, seriously affecting the water landscape effect

Most urban rivers do not have long-term water quality protection measures. Due to the poor water quality of the diversion water source itself, the ecological structure of the lake area is incomplete, and there is no effective purification measure. When various pollution sources accumulate in the lake area and reach a certain concentration, urban rivers The degree of eutrophication continues to rise, and the attached algae (moss) and planktonic algae (green algae, blue-green algae, etc.) multiply in large numbers in the lake area, and the suspended solid particles brought by the surface runoff and atmospheric dry and wet deposition enter the water body, causing the water body to remain in a turbid state for a long time. The water quality continues to deteriorate, and in severe cases, it will become a black and odorous water body, affecting the health of residents

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