摘要
以TM影像图、数字高程模型DEM、土地利用类型图、土壤数据为信息源,以GIS技术和RUSLE模型为研究方法,对粤东黄冈河流域土壤侵蚀进行了评估,并分析了影响土壤侵蚀的主要因素。结果表明,降雨是影响土壤侵蚀的最主要因素,该流域多年平均土壤侵蚀模数为1 745.5 t/(km2.a),属轻度侵蚀;地形地貌是影响土壤侵蚀的显著因素,随着地形坡度的增加土壤侵蚀模数显著增大;不同土地利用类型的土壤侵蚀量差异较大。根据研究结果,指出15°—25°、25°—35°两个坡度带和居民点及交通用地、草地为黄冈河流域土壤侵蚀防治的重点区域。
The paper evaluated the soil erosion of Huanggang River basin in eastern Guangdong and analyzed the main affecting factors to soil erosion by taking the data of TM images,digital elevation model(DEM),land use types map and soil data as information source and taking GIS technique and RUSLE model as the method of study.The outcomes show that: a) rainfall is the most important affecting factor to soil erosion and the average annual erosion modulus is 1 745.5 t/(km2·a),belonging to light erosion;b) topography is the significant affecting factor to soil erosion and the erosion modulus is remarkably increased as the increase of slope and;c) the difference of soil erosion of different types of land use is greater.Based on the results of study,it points out that the regions with slope of 15°-25° and 25°-35°,residential area,land use for transportation and grassland are the key areas of soil erosion control of the river basin.
出处
《中国水土保持》
2013年第2期34-37,69,共4页
Soil and Water Conservation in China
基金
2011年度广东省大学生创新实验资助项目(1056411069)
