粤西坡耕地区水土流失特征及防治措施——以泗纶小流域为例

Study on the Soil Erosion Status and Prevention & Control Measures in the Slope Cropland Areas of Western Guangdong Province——A Case Study of Silun Small Watershed

选取广东省泗纶小流域为研究区,以GIS技术为支撑,选用通用土壤流失方程(USLE)为数学模型,利用GIS技术的空间分析功能,计算降雨、植被、土壤、地形、土地利用等单因子并叠加分析,生成水土流失现状分布图。通过对区域内的土壤侵蚀强度进行分析、评价,得出影响流域水土流失的关键因子,并根据研究结果对流域内坡耕地水土流失提出相关防治措施,从而为广东省坡耕地区小流域水土流失治理提供理论支撑。

The Silun small watershed in Guangdong province was selected as the study area. Based on the spatial analysis function of the GIS,the calculation and overlay analysis was conducted on the single factor of rainfall,vegetation,soil,topography,land use and so on by using the Universal Soil Loss Equation（ USLE） as the mathematical models,so as to generate status maps of soil erosion. The analysis and evaluation was conducted on the soil erosion strength in the region and got the key factor of soil erosion in the watershed. In accordance with the research results,it was suggested the prevention and management measures on soil erosion of slope cropland areas within the watershed so as to provide the theory support for the soil erosion control at the small watershed in slope cropland areas of Guangdong Province.