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《ACTA GEOGRAPHICA SINICA》 1996-02
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PROCESS-BASED SOIL EROSION AND SEDIMENT YIEID MODEL IN A SMALL BASIN IN THE HILLY LOESS REGION

Cai Qiangguo(Institute of Geography,Chinese Academy of Sciences,Beijing 100101)Shiu-hung Luk(University of Toronto Toronto. Canada)Wang Guiping(Shanxi Institute of and Water Conservation, Lishi Shanxi 033000)  
The loess Plateau region, where the study area is located,is one of the most severely eroded regions of China. In reviewing the existing models,we have developed a process-based soil erosion and sediment yield model to predict small basin sediment production in the hilly loess region.In the view of the complex topographical conditions. a wide range of processes and subprocesses of erosion are active, and the associations produce patterns of down slope changes in soil loss which are considerably more variable than the systematic changes generally reconginzed in existing models. This model is divided into three submodels: the hillslope submodel,the valley slope submodel, and the channel submodel.Spatial units considered in this model are parcels of land with general homogeneity in characteristics, i. e.slope zones. For the temporal scale, the model is designed to estimate per storm responses in runoff and soil loss. The specific equations and the algorithm flow chart of three submodels are given seperately in this paper.
【Fund】: 国家自然科学基金
【CateGory Index】: TV149.2
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