Multi-stage ecological revetment purification system

Abstract

The invention discloses a multi-stage ecological revetment purification system. The multi-stage ecological revetment purification system comprises a first-stage ecological revetment, a second-stage ecological revetment, a N-stage ecological revetment and a <N+1>-stage ecological revetment which are closely connected and sequentially reduced in height from a direction away from a river channel to adirection close to the river channel, wherein N is a positive integer which is no less than 2; each stage of ecological revetments is provided with a planting layer and a substrate layer; each planting layer is arranged above a substrate layer; plants are planted on each planting layer; each substrate layer is made of sand and gravels; the planting layers of the first-stage ecological revetment,the second-stage ecological revetment and the N-stage ecological revetment are made of planting soil; the planting layer of the <N+1>-stage ecological revetment is made of a mixed substrate; and adjacent stages of ecological revetments are in communication through water outlet pipes which are horizontally inserted in substrate layers. Thus, the multi-stage ecological revetment purification systemprovided by the invention can achieve the effect of removing nitrogen and phosphorus from rainwater, and improves the purification function of runoff rainwater sewage.

Description

technical field [0001] The invention relates to the technical field of river bank purification, in particular to a multi-stage ecological revetment purification system. Background technique [0002] At present, water bodies such as lakes and rivers in my country are polluted to varying degrees, mainly from non-point source pollution. Due to the application of various nitrogen scale fertilizers in the process of agricultural production, a large part of them enters the river through surface runoff, resulting in eutrophication of the river water; waste and sewage from poultry and animal husbandry are discharged in an unorganized manner. After these pollutants enter the water body, the water quality will be affected. deterioration. [0003] In order to protect and manage the natural riparian zone, restore and rebuild the riparian zone severely damaged by human activities, the construction of ecological revetment is the development trend of modern river management. At present, ...

AI Technical Summary

Problems solved by technology

For example, due to the limited space of the existing river channel, some bank revetments are vertically hardened, so it is difficult to carry out ecological transformation, and there is no purification function for the runoff rainwater entering the river channel; some ecological bank revetment structures are mainly suitable for slope-type bank revetment structures with wide river channel construction sites, It occupies a large area, which increases the difficulty and cost of construction; the ability to intercept and degrade pollutants and hydraulic load is generally low, and the ability to collect and purify urban rainfall runoff non-point source pollution is also weak

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