基于GIS和USLE模型的安庆市水土流失敏感性评价

Analysis on the Sensitivity of Water and Soil Loss in Anqing City Based on GIS and USLE Model

基于GIS和USLE模型,结合遥感影像卫星及降雨资料,对安庆市水土流失敏感性进行分析。结果表明,安庆市植被分布情况较好,高及中高植被占比较高,分别达到34.3%和37.2%。土地利用C因子中的裸地值最高,降雨侵蚀力分布呈现出从北往南依次增加的趋势,与植被相关性较高,土壤侵蚀轻度敏感区域占比最高,达到84.1%,整体处于轻度敏感范围。

Based on GIS and USLE Model,combined with remote sensing image satellite and rainfall data,this paper analyzes the sensitivity of water and soil loss in Anqing city,and finally concludes that the vegetation distribution in Anqing city is good,with high and medium high vegetation accounting for 34.3%and 37.2%respectively.The value of bare land is the highest among the C factors of land use,and the distribution of rainfall erosivity shows a trend of increasing from north to south in turn,which is highly related to vegetation.The proportion of slightly sensitive areas of soil erosion is the highest,reaching 84.1%,and the whole area is in the slightly sensitive range.