Method for improving water quality of steep-slope river by drop-aeration

Abstract

The invention relates to a method for improving water quality of a steep-slope river by drop-aeration. The invention comprises the following steps: driving wood piles at two sides of a river channel, backfilling a mixture of crushed stones and soil into a riverbed between a revetment and the piles, covering vegetation to form a plant platform, pouring a trapezoid concrete pier across the river channel to form a overflow weir, and stacking block stones on the overflow weir, wherein the block stones are divided into two sides; the side with higher block stones has small gaps, and the side with lower block stones has large gaps. The invention solves the defects that existing river treatment method results in the loss of deep pools and shoals in natural rivers; primary producers such as various phytoplankton and zooplankton can not reproduce; and benthic and large animals which eat them can not inhabit the river. The invention has low cost, and good permeability, can provide aquatic animals and plants with habitat space, can form a multi-flow changing zone, a multi-organism growing zone, and a multi-fish hideout, has good drop-aeration effect, and can reduce soil loss.

Description

technical field [0001] The invention belongs to the field of restoration of water ecosystems, and in particular relates to a method for improving water quality by dropping water and aerating a river with a steep slope. Background technique [0002] Traditional river management focuses on safety considerations, and pays more attention to the optimal hydraulic radius. It simply starts from increasing the flood discharge capacity, making the river channel artificial, the cross-section simplistic, and the river bed hard. Although the goal of flood control has been achieved, the river ecosystem has been degraded and biodiversity has been greatly reduced. With the enhancement of human environmental awareness, ecological concepts and living standards, the whole society has more and more urgent requirements for ecological restoration and reconstruction of degraded rivers. The idea of ​​river near-nature governance or river ecological restoration is proposed for the degradation of r...

AI Technical Summary

Problems solved by technology

[0003] Before the present invention, the existing methods of river management all resulted in the lack of deep pools and shoals in natural rivers, making it impossible for primary producers such as various phytoplankton to reproduce, and for benthic and macrofauna that feed on them. start to perch

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