SPATIOTEMPORAL DYNAMICS AND INFLUENCING FACTORS OF SOIL EROSION IN THE DIANCHI LAKE BASIN, CHINA

Mastering the spatiotemporal evolution tendency of soil erosion and its influencing factors is of great significance for optimizing regional soil and water conservation measures, ensuring sustainable development. This study calculated the soil erosion modulus and investigated the spatiotemporal dynamics of soil erosion intensity in the Dianchi Lake basin of China during the 1999-2014 period based on the revised universal soil loss equation (RUSLE) model and geographic information system (GIS) and remote sensing (RS) techniques. The results showed that the soil erosion in the Dianchi Lake basin has been improved in the past fifteen years, and the erosion area is shrinking continuously, but the unit erosion intensity is increasing, indicating that local area erosion is still serious. The analysis results show that soil erosion can easily occur of cultivated lands with slopes of 8-25 degrees and a vegetation coverage in 0%-45% forestland. The area of intensity of soil erosion exhibited a decreasing trend, indicating a gradual improvement in the situation of soil erosion. However, the soil erosion phenomenon in cultivated land, forest land and bare land with a slope of 8-25 degrees and a vegetation coverage of 45% or less is severely. This study provides a theoretical foundation and methodological reference for research on soil erosion and its influencing factors in similar highlands Lake basin.