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| Study on the Rules of Scales' Changes On Soil Erosion and Sediment Yield in Catchments |
| Tang Zhenghong1,Cai Qiangguo1,Xu Feng2 |
| 1 Institute of Geographical Sciences and Natural Resources Research,Chinese Academy of Sciences,100101; 2 Monitor Center of Water and Soil Conservation of Ministry of Water Resources,100053: Beijing, China |
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Abstract The rules of scales' changes on soil erosion and sediment yield has been the advances of soil erosion studies, which include a range of scopes from soil grains to global climate changes and carbon cycle process. What should the inner relationships be between the soil erosion and sediment transport in various scales catchments? Whether or not to apply the research results of small catachments to larger regions? All of these have been the important scientific problems which should be solved urgently. It's just a beginning about the studies on the rules of scales in catachments in overseas, and the domestic research focused on hydrology. It is rare for the studies about the soil erosion process, sediment transport process and sediment yield in various scales. The paper summarized the new advances for international soil erosion model, and analyzed the rules of scales' changes. Since GIS has powerful capabilities for spatial data management and analysis, which will play an important role in this new filed.
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Received: 12 September 2003
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