Riverway bypass water purification wetland system

Abstract

The invention relates to a riverway bypass water purification wetland system. The system comprises a drainage water purification section, a circuitous water purification section and a drainage water purification section which are sequentially communicated, wherein a water outlet of the drainage water purification section is communicated with the main river channel; the drainage water purificationsection comprises a drainage channel communicating a water inlet and the main river channel, gravels laid in the drainage channel, and gravel tumbling weirs and a plurality of first spur dikes which are sequentially distributed in the water flow direction; the first spur dikes are sequentially arranged on the two sides of the drainage channel in a staggered mode to form a snake-mouth-shaped firstpurified water channel, and the heads of the first spur dikes are obliquely arranged in the water flow direction. Sewage of the riverway sequentially flows into the circuitous water purification section and the drainage water purification section to be purified through water flow purified by the drainage water purification section and then flows into the main riverway again, multi-stage circuitousoperation is completed, and the riverway water quality purification effect is improved; and the plurality of first spur dikes form a snake-mouth-shaped first water purification channel with small circuitous water flow, so that the flow velocity can be reduced, the reflux is reduced, the contact time of water and a substrate is prolonged, the water dissolved oxygen is increased, and the river water purification effect is further improved.

Description

technical field [0001] The invention relates to the technical field of river ecological management, in particular to a river bypass water purification wetland system. Background technique [0002] In recent years, with the rapid development of my country's economy and the excessive development and utilization of water resources, agricultural sewage, domestic sewage, surface runoff water, etc. have flowed into rivers, resulting in the deterioration of river water quality and serious damage to the ecological environment of rivers. In addition to external source pollution, the internal source pollution of the river cannot be ignored. The black mud at the bottom of the river has been floating on the water surface for a long time. At present, the focus of river channel improvement is to intercept pollution and control dirty, chaotic and poor treatment. However, pollution interception and treatment can only solve external pollution, while internal pollution still exists, and the e...

AI Technical Summary

Problems solved by technology

However, pollution interception and treatment can only solve external pollution, while internal pollution still exists, and the ecological functions of rivers still cannot be restored.

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