Ecological restoration method for water-eroded slope surface of alpine grassland

Abstract

The invention provides an ecological restoration method for a water-eroded slope surface of an alpine grassland. The method comprises the following steps: building a plurality of flood intercepting ditches on a bare land to be restored along a contour line, longitudinally communicating the flood intercepting ditches to a valley of a hillside along drainage ditches, building the drainage ditches along the valley, building check dams below the drainage ditches at intervals, building a stilling pool at the toe of the slope, arranging effluent weirs at outlets of the flood intercepting ditches, and installing a drip irrigation pipe network system at the bottom; and digging out surface soil of the bare land to be restored, carrying out multi-layer screening on the dug surface soil and soil dug out of the flood intercepting ditches, making stone ridges from screened stones and small gravels, laying screened clay soil on the lowest layer of the bare land to be restored, mixing powder soil, sand soil, yak manure, seeds and cut grass sections, laying the mixture on the clay soil layer as a composite layer, and laying coarse sand grains on the composite layer, and completing ecological restoration of the water-eroded slope surface of the alpine grassland. According to the method, through the combination of engineering facilities and ecological protection, interference to ecology is reduced, and a good repairing effect on the water erosion phenomenon is achieved.

Description

technical field [0001] The invention belongs to the technical field of water and soil conservation and ecological restoration of alpine grassland, and in particular relates to an ecological restoration method for water-eroded slopes of alpine grassland. Background technique [0002] With an area of ​​about 2.6 million square kilometers, the Qinghai-Tibet Plateau is the highest, largest and unique geographical unit in the world, and an important barrier to China's ecological security. Because of the seven important rivers in Asia, including the Yellow River, the Yangtze River, the Ganges River, the Mekong River, the Indus River, the Salween River and the Ayeyarwady River, it is called the "Asian Water Tower" and provides water conservation value and soil and water conservation value for the downstream. inestimable. However, under the dual pressures of global warming and human overgrazing, the alpine grasslands on the Qinghai-Tibet Plateau are degraded and soil erosion is int...

AI Technical Summary

Problems solved by technology

The special alpine climate on the Qinghai-Tibet Plateau makes the conventional methods of planting shrubs or trees unrealizable, and the fragile ecological environment is not suitable for operations such as platform leveling and fish scale pit excavation on the existing alpine grassland

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