An ecological restoration method for water-eroded slopes of alpine grasslands

Abstract

The invention provides an ecological restoration method for water-eroded slopes of alpine grasslands. By building a plurality of flood intercepting ditches along the contour lines on the bare land to be repaired, the flood intercepting ditches are vertically connected to the valleys on the hillside by drainage ditches, and are constructed along the valleys. Drainage ditch, build valleys at intervals under the drainage ditch, build a stilling pool at the foot of the slope, set a water outlet weir at the outlet of the flood interception ditch, and install a drip irrigation pipe network system at the bottom; dig out the surface soil to be repaired and excavate the flood interception ditch The obtained soil is screened at multiple levels, and the screened stones and small gravels are used to make stone ridges. The screened clay soil is spread on the bottom layer of the bare land to be repaired, and the silt soil, sand soil and yak manure are mixed. , seeds, and cut grass sections are mixed, spread on the clay soil layer as a composite layer, and coarse sand is spread on the composite layer to complete the ecological restoration of the water-eroded slope of the alpine grassland. The invention not only reduces the interference to the ecology, but also has a better repairing effect on the water erosion phenomenon through the method of combining engineering facilities and ecological protection.

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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