Method for reducing transportation of riverway sediment along banks in pisha sandstone area in middle reach of Yellow River

Abstract

The invention relates to a method for reducing the transportation of riverway sediment along banks in a pisha sandstone area in the middle reach of the Yellow River. The method comprises the five steps of slowing down the water flow along the banks of a riverway, preventing and controlling water flow eroding and scattering of pisha sandstone, fixing the pisha sandstone (sediment) scattered in theriverway, improving the stability of the slope bottom structure of the pisha sandstone, and restoring vegetation and a micro-ecological environment. According to the method for reducing the transportation of the riverway sediment along the banks in the pisha sandstone area in the middle reach of the Yellow River, according to the physical properties of the pisha sandstone, the unique climate of the pisha sandstone area and characteristics of different plant species of the pisha sandstone area and technical measures, the ecological restoration principles of short cycle, high effectiveness, lowcost, good effect and sustainability are accorded with, an ecological treatment system for the pisha sandstone collapse area along the banks of the riverway is established, the vegetation is quickly restored, the plant-water-mud / sand ecological balance is achieved, and a technical system for efficiently reducing the transportation of the riverway sediment along the banks in the pisha sandstone area in the middle reach of the Yellow River is constructed.

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...

AI Technical Summary

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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