%0 Journal Article
%T Soil erosion risk evaluation using GIS in the Yuanmou County, a dry-hot valley of Yunnan, China<br>
%A HongYi Zhou
%A HuiXia Li
%A <br>
%J 寒旱区科学
%D 2009
%I 
%X Soil erosion is a major threat to sustainable agriculture. Evaluating regional erosion risk is increasingly needed by national and international environmental agencies. This study elaborates a model (using spatial principal component analysis SPCA]) method for the evaluation of soil erosion risk in a representative area of dry-hot valley (Yuanmou County) at a scale of 1:100,000 using a spatial database and GIS. The model contains seven factors: elevation, slope, annual precipitation, land use, vegetation, soil, and population density. The evaluation results show that five grades of soil erosion risk: very low, low, medium, high, and very high. These are divided in the study area, and a soil erosion risk evaluation map is created. The model may be applicable to other areas of China because it utilizes spatial data that are generally available
%K soil erosion risk
%K spatial principal component analysis (SPCA)
%K GIS
%K Yuanmou County
%K China<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=179362CF6F8AE4E2D95268111832CC42&aid=B88180218F675DD8CEABDDA7CC03E005&yid=DE12191FBD62783C&vid=CA4FD0336C81A37A&iid=38B194292C032A66&sid=8899A7FFF887A2C5&eid=689CFDC008B023C8&journal_id=1674-3822&journal_name=寒旱区科学&referenced_num=0&reference_num=0