A method for comprehensive control of mobile sand dunes by capping, fixing slopes and locking edges

Abstract

The invention provides a method for comprehensive treatment of a moving dune through top sealing, slope fixing and side locking. The method comprises top sealing, slope fixing and side locking of the moving dune. Top sealing is to cover the top of the moving dune with a covering net, so that the original morphological characteristics of the top of the moving dune are protected; the overall wind speed of the moving dune is lowered; the moving rate of the moving dun is reduced. Slope fixing is carried out by adopting a sand fixing box for fixing the slope of the moving dune, so that sand burial and wind erosion can be effectively prevented; the wind speed of the earth surface is lowered; crust formation and plant growth are facilitated; recovery of an ecological system of the slope of the moving dune is promoted. Side locking is to arrange three sand blocking fences on the field among hills, so that the sand source is intercepted; the frequency that slop fixing measures and the field among the hills are buried by sand is reduced; the wind speed of the field among hills is lowered; the ecological system of the field among the hills is protected. According to the top sealing, slope fixing and side locking modes provided by the invention, a wind-sand moving is effectively prevented; the moving dune is fixed; sand damage is treated fundamentally; the ecology is protected; the method is sustainable; large-area popularization and application are easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of sand damage prevention and ecological restoration, and relates to a comprehensive method for controlling mobile sand dunes by capping, fixing slopes and locking edges. Background technique [0002] There are 1.67 million Km of deserts, Gobi, wind-eroded land and desertified land in my country 2 , accounting for 17.4% of my country's land area. The narrow desert area covered by sand dunes is 684,000 square kilometers, of which the mobile desert covers an area of ​​446,000 square kilometers, the semi-fixed desert covers an area of ​​144,000 square kilometers, and the fixed desert covers an area of ​​94,000 square kilometers. , the most difficult to manage. [0003] For a long time, wind and sand control technology has been mainly implemented in desert areas and nearby transportation facilities (railways, highways), power transmission lines, oil pipelines, production and living facilities (farmland, reside...

AI Technical Summary

Problems solved by technology

[0004] At present, sand dune management methods include: one is to directly cover the sand dunes with traditional sand control techniques, such as grass grids, nylon mesh grids, stone grids, willow grids and other mechanical sand prevention measures, but the cost of this method is very high. High, and the anti-sand effect is very poor

Due to the strong sand flow activity on the surface of the mobile sand dunes, its characteristics are different from those of the normal Gobi wind sand flow. The wind erosion is the strongest at the bottom of the windward side of the sand dune. Buried and other phenomena

Another method is to use large carts and other machinery to directly flatten the sand dunes, and then lay traditional sand-fixing grids on the flattened sand surface. 1. Huge financial resources; second, it caused damage to the original dune ecosystem. The terrain between the dunes is low and has a lot of water. The terrain between the dunes is an area where desert plants grow concentrated, and it is also an area that controls the movement of sand dunes

Flattening sand dunes will cause the disappearance of a large number of inter-dune lands, prompting the death of a large number of psammophytes due to the destruction of their growth sites; third, the effect of sand control is poor, and flat sand surfaces are more conducive to wind and sand flow than sand dunes, and can accelerate wind erosion. It is easy to blow away and bury the traditional sand-fixing grid

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