Methods to reduce the transport of river sediment along the coast of the Pishayan area in the middle reaches of the Yellow River

Abstract

The invention relates to a method for reducing the river channel sediment transport in the middle reaches of the Yellow River in the sandstone area of ​​the Yellow River. It consists of slowing down the water flow along the river, preventing the water flow from eroding the scattered sandstone, fixing the sandstone (sand) scattered in the river, and increasing the stability of the sandstone slope bottom. nature, restoration of vegetation and micro-ecological environment” consists of five steps. The method of the present invention to reduce the transport of river sediment in the sandstone area of ​​the middle reaches of the Yellow River is based on the physical properties of the sandstone area and the unique climate of the sandstone area, as well as its different plant varieties and The characteristics of technical measures follow the ecological restoration principle of "short cycle, quick effect, low cost, good effect, and sustainable", establish an ecological governance system for the collapsed sandstone area along the river, quickly restore vegetation, and realize plant-water-mud / sand To build a technical system to efficiently reduce the transport of river sediment in the sandstone area of ​​the middle reaches of the Yellow River.

Description

Technical field: [0001] The invention belongs to the field of ecological environment management, and in particular relates to a method for reducing the transport of river sediment along the coast of the sandstone area in the middle reaches of the Yellow River Background technique: [0002] The arsenic sandstone is widely distributed in the hilly and gully areas of the Loess Plateau, especially in the Ordos Plateau. In the Paleozoic Permian, Mesozoic Triassic, Jurassic and Cretaceous thick sandstone, sand shale and argillaceous sandstone interbedded common name, also known as the cancer of the earth. The internal structure of Pisha Rock is loose, with high porosity, strong hydrophilicity and poor cohesive force, and it is easy to collapse when exposed to water. The temporal and spatial distribution of precipitation in the Pishayan area is extremely uneven and relatively concentrated, mostly in the form of short-term torrential rain. The arsenic sandstone is subjected to wat...

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Problems solved by technology

[0003] As an industrial repair material, the curing agent is applied to the exposed slope of Pisha sandstone. It can be cured by spraying on the surface of the slope, but its cost is high and it cannot be used in a large area.

Secondly, due to the influence of geological movement, the arsenic sandstone has not been completely petrified, and the slope structure near the river is extremely unstable. Moreover, the arsenic sandstone is easily collapsed and scattered due to water erosion, wind erosion, and gravity erosion, and the ecological protection effect is poor.

Seabuckthorn is an ecological shrub that is mainly promoted and used in the sandstone area. Its growth rate is slow, and it cannot independently form a barrier in a short period of time to resist the erosion of the sandstone scattered in the river by the flood in the rainy season and reduce the transport of sediment along the coast.

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