Method and device for preventing and controlling water and soil loss in wave-type sloping cultivated land

Abstract

The invention provides a method and device for controlling water and soil loss of a wavy type slope cropland. A drain pipe is buried under the ground of a valley of the wavy type slope cropland in the longitudinal slope direction, the lower portion of the drain pipe is led into a field channel or river channel, a plurality of horizontal wall building ridges are arranged at the valley in a segmented mode in the longitudinal slope direction, the buried depths of the wall building ridges are one half of the heights of the wall building ridges, vertical pipes are arranged in the centers of the wall building ridges and communicated with the drain pipe, a plurality of water conduits which are led to the outside are arranged on each vertical pipe and face an upstream face, the water conduits are obliquely upward from outside to inside, and the outer ends of the water conduits are exposed above the ground. The wall building ridges are used for blocking collected runoffs, water flow speed and water flow impacting strength are lowered, silts are sedimented, clear water is drained, the surface runoff regulating and controlling rate is 97.5%, the silt regulating and controlling rate is 99.9%, and the cavitation reduction effect on water and soil loss of the wavy type slope cropland is obvious. Compared with the prior art, the service life of the device can be tens of years, the effect is stable, maintenance cost is low, the device is especially suitable for slope croplands with thin soil layers, and project cost of the device is 2.4 times lower than that of a cross-wall terrace.

Description

technical field [0001] The invention belongs to the technical field of water and soil conservation engineering, and in particular relates to a method and a device for preventing and controlling water and soil loss of wave-shaped sloping cultivated land. Background technique [0002] my country is one of the countries with the most serious water and soil erosion in the world. Water and soil erosion is mainly distributed in five major water and soil erosion areas: the Northwest Loess Plateau, the Southwest Yunnan-Guizhou Plateau, the North Plateau Mountains, the South Mountains and Hills, and the Northeast Semi-humid Plain. According to statistics from the Ministry of Water Resources in 2009, the area of ​​soil erosion in my country has reached 3.56 million square kilometers, accounting for about 37% of the country's land area, and the average annual soil erosion volume is as high as 4.5 billion tons. There are different degrees of soil erosion in all provinces of the country,...

AI Technical Summary

Problems solved by technology

Existing soil and water conservation measures (including tillage measures and biological measures) for sloping cultivated land are mainly aimed at straight slopes with no transverse undulations, but are difficult to play a role in wave-shaped slopes with confluence of wave troughs, especially for wave-shaped slopes with thin There is no report on the control measures of water and soil loss in slope cultivated land

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