Overall ecological remediation system of eutrophic plain river network

Abstract

The invention discloses an overall ecological remediation system of an eutrophic plain river network. The overall ecological remediation system comprises an upstream river network area, a downstream river network area, a front river network trunk channel, a rear river network trunk channel, branch river network channels, a backflow channel, a residue removing device, an oil partitioning device, a high-breeding-density filtering fish breeding pool and a water level raising device, wherein the backflow channel is arranged between the downstream river network area and the upstream river network area; the residue removing device, the oil partitioning device, the high-breeding-density filtering fish breeding pool and the water level raising device are sequentially arranged on the backflow channel; water in the downstream river network area is raised by the water level raising device through the residue removing device, the oil partitioning device and the high-breeding-density filtering fish breeding pool in sequence, and is fed into the front river network trunk channel together with water in the upstream river network area. The overall ecological remediation system has the advantages that the ecological remediation effect is easy to manage and control, the operation cost is low, nitrogen and phosphorus in a water body can be greatly reduced, and the area of a river network is barely occupied.

Description

technical field [0001] The invention belongs to the field of water ecological restoration and relates to an overall ecological restoration system of a eutrophic plain river network. Background technique [0002] Plain river network is one of the main types of urban river network. It is characterized by small water level drop between the upper and lower reaches of the river network, slow water flow, low self-purification capacity of the water body, and the large amount of urban pollution entering the river, resulting in serious eutrophication of the river network in the plain, and frequent outbreaks of algal blooms in the river network in summer. The quality of life of urban residents has been seriously impaired. [0003] In order to solve the eutrophication problem of plain river network, the main measures taken at present are as follows: [0004] 1) Increase sewage interception efforts to reduce the amount of pollution entering the river; 2) Divert and flush sewage to acc...

AI Technical Summary

Problems solved by technology

However, the method of reducing the light on the water surface makes the water surface smaller and damages the river landscape, and the method of adding filter-feeding fish is difficult to effectively control the effect due to the large area and dispersion of the river channel. The method of planting aquatic plants is used to effectively dispose of the harvested plants. higher cost

Not only that, the in-situ treatment technology itself does not have the function of cleaning up garbage and oil slicks in the water. When the in-situ treatment technology is used, the surface garbage can only be salvaged along the river by manual or mechanical boats. Salvage is labor-intensive, and the oil on the water surface is basically impossible to remove

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