GIS-Based Assessment of Soil Erosion at Nihe Gou Catchment  

作　　者：ZHANG Qing-feng WANG Li WU Fa-qi 

机构地区：[1]Center for RS-GIS, School of Resources and Environment, Northwest A ＆ F University, Yangling 712100, P.R.China [2]State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences （CAS）, Yangling 712100, P.R.China

出　　处：《Agricultural Sciences in China》2008年第6期746-753,共8页中国农业科学（英文版）

基　　金：funded by the National Natural Science Foundation of China(40501031);the University Research Project(08080115),administrated by the Northwest A&F University of China.

摘　　要：The paper discussed theory and methodologies of soil erosion assessment and established an implementation process according to USLE factors combining with thematic paper maps and DEMs. Factors of USLE- R, K, S, L, P and C were adapted to the test area, the Nihe Gou catchment in Chunhua County of Shaanxi Province, China. Afterwards the parameters of the USLE were evaluated individually and merged in order to calculate the amount of soil loss over the corresponding years, 1977 and 2003. In order to derive all necessary factors a TIN was generated out of a paper contour map. Furthermore, thematic paper maps and climate data completed the source of information for the implementation. The quantitative methodologies integrated with GIS were applied during the process. The verification of the result was performed comparing the real world situation at the test area with the resulting thematic maps. It shows these principles and methodologies were reasonable and feasible and can provide basis or reference for further areas of the Chinese Loess Plateau.The paper discussed theory and methodologies of soil erosion assessment and established an implementation process according to USLE factors combining with thematic paper maps and DEMs. Factors of USLE- R, K, S, L, P and C were adapted to the test area, the Nihe Gou catchment in Chunhua County of Shaanxi Province, China. Afterwards the parameters of the USLE were evaluated individually and merged in order to calculate the amount of soil loss over the corresponding years, 1977 and 2003. In order to derive all necessary factors a TIN was generated out of a paper contour map. Furthermore, thematic paper maps and climate data completed the source of information for the implementation. The quantitative methodologies integrated with GIS were applied during the process. The verification of the result was performed comparing the real world situation at the test area with the resulting thematic maps. It shows these principles and methodologies were reasonable and feasible and can provide basis or reference for further areas of the Chinese Loess Plateau.

关 键 词：USLE DEM TIN soil and water conservation 

分 类 号：S15[农业科学—土壤学]