基于3S技术的库区水土流失分级研究

Grading of Soil and Water Loss in Reservoir Based on the 3S Technology

采用3S(GPS、RS、GIS)技术对水土流失各影响因子打分,随后通过主成分分析并叠合各影响因子划分水土流失等级,对东张水库及龙江流域下游区域进行水土流失程度分级.实验表明该水土流失分级方法可降低工作量和成本,缩短工作周期,并可实现水土流失动态检测,具有一定的分级精度.并提出了一种探索水土流失分级的可行性方法.

This paper gives scores to various influencing factors of soil and water loss rate based on the technology of 3S（ GPS,RS,GIS） ,then grading methods for soil and water loss by the method of the prin-cipal component analysis and superimpose various influencing factors.We can find the results through the experiment in eastern Dong Zhang reservoir and LongJiang river downstream that the grading method used by 3S can reduce the workload and cost,shorten the working period.What’ s more,it can realize the dy-namic detection of soil erosion,and has certain classification accuracy.Also,this paper puts forward feasi-ble method of exploring the grading of water loss and soil erosion.