基于“3S”三川流域土壤侵蚀经济损失评价分析

Evaluation Analysis of Economic Loss of Soil Erosion in Three River Basin Based on "3S"

利用"3S"技术,对济南市南部山区三川流域1990年、2000年、2010年三期遥感影像进行解译处理,得到了三期土壤侵蚀分布图,利用中国土壤流失方程(CSLE)对土壤侵蚀模数进行了计算,选用"影子工程"法对土壤侵蚀进行了经济损失的定量评价。研究表明:3个年份的土壤侵蚀强度分布基本一致,从1990～2010年,土壤流失经济损失逐渐减少,其中养分的损失最重,土壤侵蚀会造成土壤生产力的下降,直接导致农作物的收成下降。

With the support of ＂3S＂ technology ,this aritlce interprets three remote sensing images of Jinan＇s southern mountain regions in 1990 ,2000 ,2008 ,and gets three soil erosion maps .And then it uses the Chinese Soil Loss Equation （CSLE） to calculate soil erosion modulus ,and quantitatively evaluates the economic loss of the amount of soil erosion by using the ＂shadow engineering＂.T hus it can be concluded that the three -year distribution of soil erosion intensity of the three yearsisbasicallyconsistent ;from 1990 to 2010 ,the eco-nomic losses of soil erosiongradually reduced ,of w hich the heaviest loss is soil nutrient loss .Soil erosion will cause a decline in soil productivity ,which will directly cause the reduce in crop yields .