A Preliminary Analysis Of The Current Situation Of Soil Erosion In Lishu County Of Jilin Based On USLE Model

Northeastern China has a high quality of black soil resources, there are a large amount of humus in black soil,with great value. Black soil has been selfless dedication for the people with the most basic food requirements.Soil erosion decreased organic matter content of black soil in Northeastern China, caused soil compaction and soil salinization as well, reduced the production capacity of grain in black soil region. In this paper, the application of remote sensing, geographic information system, data query, field verification and other means to obtain rainfall, topography, soil erodibility, land vegetation-cover types, vegetation coverage and water conservation measures such as data. Then calculating and analysing soil erosion in Jilin province Lishu County by USLE model, the main conclusions are as follows:(1) The total area of grassland and woodland are about 402.1km2 in Lishu County, which is about 10.42% of total land area; The grassland and woodland in Lishu County are mainly composed of severe coverage, moderate and severe coverage, accounted for the total area of woodland and grassland 42.30%、23.85%.(2)The total area of erosion area is about 873km2 in Lishu County, which is 22.61% of total land area; Moderate, extremely strong and intense accounted for a small part of it.(3)Lishu county soil erosion amount is about 1651024 t, 2013, basically give priority to be mild, moderate and severe.(4)Moderate water erosion, extremely strong water erosion area is significantly reduced of Lishu county in 2013 compared with 2010. Moderate water erosion area is reduced120.7 square kilometers. It reduces the most.