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| Discussions on methods of national regional soil erosion survey |
| Yang Qinke<sup>1</sup>,Li Rui<sup>1</sup>,Liu Yongmei<sup>2</sup> |
| 1.Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,712100,Yangling,Shaanxi;2.Department of Urban and Resource Sciences,Northwest University,710069,Xi'an: China |
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Abstract It is a precondition for a region to make periodically survey of soil erosion to provide dynamic information for soil conservation planning.Regional soil erosion assessment is also one of key scientific issues for soil sciences.Based on the reviews of methodologie on regional soil erosion survey and mapping,regional soil erosion factors,scale effects of soil erosion and soil erosion models,some suggestions were proposed for the forthcoming national soil erosion survey.In order to assess soil loss quantitatively,newest results of regional soil erosion model should be applied in the survey.Contents of the survey,such as factors of soil erosion at the regional scale,types and intensity of soil erosion,soil conservation practices,and sampling investigation in typical soil erosion areas,should be included.Furthermore,the key techniques,such as scale effects of soil erosion,demonstrative application of soil erosion models,and data management of the survey,should be addressed to.
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Received: 21 February 2008
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