System and method for ecological management and reutilization of riverway water resources

Abstract

The invention relates to a system and a method for ecological management and reutilization of riverway water resources. The system comprises a vertical subsurface flow wetland and a horizontal subsurface flow wetland which are connected in series, wherein the vertical subsurface flow wetland comprises a first vegetation layer, a microbiological layer, an upper isolation layer, a filtering materiallayer, a lower isolation layer and a first water permeable layer which are sequentially arranged from top to bottom; a waterproof partition plate is arranged in the middle part of the vertical subsurface flow wetland to divide the vertical subsurface flow wetland into a left subsurface flow wetland and a right subsurface flow wetland which communicate with the first water permeable layer locatedat the bottom part of the vertical subsurface flow wetland; the left subsurface flow wetland and the right subsurface flow wetland are respectively provided with a water inlet and a water outlet; thewater outlets of the left subsurface flow wetland and the right subsurface flow wetland respectively communicate with the water inlet of the horizontal subsurface flow wetland through pipelines; valves are arranged on the pipelines; and the horizontal subsurface flow wetland comprises a second vegetation layer, a horizontal filler layer, an isolation layer and a second water permeable layer whichare sequentially arranged from top to bottom. The system is not prone to being blocked by a filler, and the filler layer is stable in structure; and the method is stable in operation, good in effluentwater quality, high in removal rate of pollutants in a river channel water body and good in treatment effect, and effluent water can be directly discharged into a river channel for cyclic utilization.

Description

technical field [0001] The invention belongs to the technical field of hydrology and water resources, and in particular relates to a system and method for ecological management and reuse of river water resources. Background technique [0002] Rivers are an important part of surface water resources and important carriers of natural resources and the environment, providing favorable water sources and environmental conditions for urban development. At the same time, in order to meet the needs of flow, flood discharge and flood discharge, a large number of rivers have been built in the city and its surrounding areas. Through the diversity and meandering of water flow, the transformation of river section, the regulation of water flow, the interlacing of deep pools and shoals, and the provision of aquatic animals and plants, A diverse living environment for microorganisms to improve the climate, beautify the environment, and regulate the ecology. However, with the rapid advanceme...

AI Technical Summary

Problems solved by technology

However, with the rapid advancement of urbanization, the development of industry and agriculture, and the imperfect legal system, the water resources of the river are seriously polluted, the ecological function is lost, the self-purification ability of the water body is reduced, and even the water body of the river is black and smelly, which not only cannot beautify environment, and also cause harm to the production, life and health of nearby residents

[0003] The main sources of river water pollution are: 1) Exogenous pollution: domestic sewage, industrial wastewater, rainwater and other surface runoffs that have not been treated or the treatment effect has not reached the standard; Dead sediment leads to sediment pollution, eutrophication of water body, and rapid algae reproduction consumes dissolved oxygen; 3) Insufficient hydrodynamic force: insufficient water or other reasons lead to slow water flow, unable to carry out normal water circulation and lead to deterioration of water quality

However, the traditional constructed wetland structure and filler are relatively single, the start-up time is long, and it is easy to be blocked. The treatment effect on the heavily polluted black and odorous river water is not good, and the effluent is difficult to meet the reuse standard.

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