Shore type ladder-grade two-dimensional surface flow water filtering riverbed in-situ ecological remediation method

Abstract

The invention discloses a shore type ladder-grade two-dimensional surface flow water filtering riverbed in-situ ecological remediation method. A riverbed space is utilized sufficiently, and the section of the riverbed is designed into functional regions including a central main river tank, a ladder-grade two-dimensional surface flow base bed, a shore water distribution ditch and the like in sequence from inside to outside, and a certain water level gradient is kept. A river vertical hydraulic gradient and an upstream residual position water head are utilized to arrange facilities including a water distribution short dam and the like at an inlet end of a remediation unit; water from a riverbed upstream is distributed to the shore water distribution ditch and the central main river tank according to the ratio. Water distribution weirs are uniformly distributed on the inner side of the water distribution ditch and are used for distributing the river water to the ladder-grade two-dimensional surface flow base bed; the river water flows through the ladder-grade base bed in a manner similar with a transverse flow regime vertical to a central line; the base bed is internally filled with substances and aquatic plants are planted to establish a complete ecological system; meanwhile, water quality is strengthened and purified and a river ecological system is remediated; the water discharged from the base bed is collected to the central main river tank so that the in-situ ecological remediation of a shore type ladder-grade two-dimensional surface flow water filtering riverbed of one unit is finished.

Description

technical field [0001] The invention relates to an in-situ ecological restoration method of a bank-type cascaded two-dimensional surface flow filtration riverbed, which is used for in-situ ecological restoration of riverbeds in seasonal rivers, polluted (micro-polluted) rivers, and rivers with small and medium flows, enhanced purification of water quality, and increased water quality. The three-dimensional green quantity of the river and the environmental protection technology of creating water landscape. Background technique [0002] The water environment pollution situation in my country is very serious, and the demand for pollution control technology is urgent, especially in seasonal urban rivers, where the river banks and buffer zone space are seriously encroached, and are often shaped into rectangular sections that occupy less space, and the water flow in flat water season or dry season Only limited to part of the riverbed space, resulting in a large area of ​​riverbed e...

AI Technical Summary

Problems solved by technology

On the one hand, due to the random characteristics of river hydrology, the operation of the above-mentioned processes is complex, with many constraints, difficult management, and high operating costs.

On the other hand, the water level of the river changes drastically seasonally, and the site conditions of the plants in the traditional in-situ restoration measures are poor. A single phytoremediation and ex-situ treatment water purification technology cannot effectively resist frequent floods and erosion. The effect of ecological restoration and water purification is difficult to last

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