Abstract
The occurrence and development of erosion gully will increase the area of soil erosion and continuously erode the cultivated land. The treatment of erosion gully is swing in the black soil region of Northeast China. However, they are all directed at the typical black soil area, while the soil erosion caused by the erosion gully in the semi-arid area of Northeast is less concerned. The study uses a combination of RS and census data. Exploring the number of erosion gully and the status of development, The survey results show that :the number of erosion gully is large, and most of them are developmental erosion gully. If the governance measures are not taken in time, the erosion ditch may continue to develop.
Highlights
If it is not treated in time, it will inevitably lead to the continuous development of erosion ditch, increase the degree of soil erosion, further reduce the area of cultivated land, and affect the integrity of the land
We should pay attention to the problems caused by soil erosion in this area, increase investment in a timely manner, strengthen remediation efforts, and control the further expansion of erosion ditch in this area
The governance of erosion ditch is mainly based on engineering, which is divided into slope engineering and ditch engineering
Summary
The semi-arid area of Northeast China mainly manifests in ecological and environmental problems such as low and concentrated annual rainfall, underdeveloped surface water system, thin and barren soil layer, poor vegetation growth environment, and poor site conditions for restoration and reconstruction. It is a typical soil erosion in Northeast my country. Fragile areas are highly sensitive to the occurrence and development of eroded gully.According to the typical study on the boundary definition of typical soil species and marginal soil species in black soil"People's Republic of China Industry Standard SL190-96 Soil Erosion Classification and Grading Standard"--the definition and description of the black soil area in Northeast China in the second-level division of the national soil erosion type division, as well as the national soil classification map soil types and the three northeastern provinces and four Inner Mongolia A spatial analysis of superimposed administrative boundaries of the Union,And refer to the distribution of vegetation types, precipitation contours, topography and other spatial distribution characteristics to identify the boundary of the sensitive area of the erosion ditch.The research area mainly includes the Fuxin Mongolian Autonomous Region in northwest Liaoning, Baicheng area in northwest Jilin, Chifeng area in Inner Mongolia and Tongliao area in Xing'an League
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