Assessing of soil erosion by radionuclide tracing and remote sensing techniques
HE Xiu-Bin-；Hui-Jie-；Hu-Yi-Bei
1.Key Laboratory of Mountain Hazards and Surface Process,Chinese Academy of Sciences,2.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences & Ministry of Water Conservancy: 610041,Chengdu;3.Tourism College of Chongqing Normal University,400047,Chongqing: China
Abstract：Remote sensing technique is widely used in soil erosion assessment due to its fitness for large-scale and rapid investigation.However,there are three limitations in the current applications: 1) to obtain cheap and high-resolution images;2) to interpret the image scientifically and accurately;and 3) to get available soil erosion monitoring data and assessment model.In China,due to lack of necessary erosion monitoring data,erosion degree are usually graded according to the subjective judgments by interpreters.It is no doubt that the erosion investigation by this method is imprecise and incredible.This paper recommends the methodology combining radionuclide tracing and remote sensing techniques to monitor and assess regional soil erosion.The hybrid method is efficient in soil erosion monitoring and assessment in terms of regional and local,plot and small watershed,quantitative and qualitative.
2008, Vol. 6 
