皖江流域土壤侵蚀监测与评价

Monitoring and evaluation of soil erosion in Yangtze River in Anhui

把修正的通用土壤流失方程(RULSE)与地理信息系统技术相结合,定量地评价皖江流域2005-2015年土壤侵蚀状况。研究结果表明,皖江流域主要侵蚀强度等级为微度和轻度侵蚀,2005年和2015年皖江流域土壤侵蚀面积分别为62 741.94km^2和62 267.1km^2。主要侵蚀地区分布在皖江流域南部、西部和中部地区。皖南山区、江淮分水岭为土壤侵蚀的主要地貌类型。2005-2015年土壤侵蚀变化分析表明,造成土壤侵蚀的原因除了与降雨量分布不均匀、地貌类型的变化及土地利用类型有关,人类对生态环境的不合理利用也是另一重要因素。

This paper combines the modified general soil loss equation（RULSE） with geographic information system technology,and quantifies the soil erosion situation in the Yangtze River in Anhui from2005 to 2015.The result shows that the main erosion strength of the Yangtze River in Anhui is mild erosion,and the area of soil erosion in the Yangtze River in Anhui in 2005 and 2015 was 62741.94 km^2 and62 267.1 km^2 respectively.The main erosion areas are in the southern,western and central areas of the Yangtze River in Anhui.The main morphological types of soil erosion is in the mountainous area of Anhui and Jianghuai watershed.Changes of soil erosion in 2005-2015 analysis shows that the causes of soil erosion are the rainfall distribution,the change of land use types and landform types,but improper utilization of the human to the ecological environment is an important reason.