中国土壤水力侵蚀的影响因素研究

Study on Influencing Factors of Soil Hydraulic Erosion in China

通过搜集全国归一化植被指数数据(NDVI)、全国降水数据、全国坡度数据以及全国土壤质地数据,对31个省级行政单位土壤水蚀情况影响因素进行定量评估,利用多元线性回归方法构建拟合方程。结果表明:植被和降水在不同区域呈现出不同趋势的变化,进而影响土壤侵蚀;坡度是主要影响因素,植被覆盖与土壤侵蚀之间呈负相关;多元线性回归模型具有较强相关性。

By collecting national normalized vegetation index(NDVI),national precipitation data,national slope data and national soil texture data,this paper quantitatively evaluates the influencing factors of soil water erosion in 31 provincial administrative units,and constructs the fitting equation by using multiple linear regression method.The results show that:vegetation and precipitation show different trends in different regions,which then affect soil erosion;Slope is the main influencing factor,and there is a negative correlation between vegetation cover and soil erosion;Multiple linear regression model has strong correlation.