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《Acta Agriculturae Nucleatae Sinica》 2005-01
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STUDY ON CHANGEABLE PROCESS OF SOIOL EROSION DISTRIBUTIVE CHARACTERISTICS ON THE SLOPE SURFACE BY REE TRACING METHOD

JU Tong-jun 1,2 LIU Pu-ling 1,2=(1.Northwest Technology University of Agriculture and Forest, Yangling,Shanxi,712100; 2.Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources, Yangling, Shanxi,712100)  
In this paper the dynamic changing process of soil erosion time and spatial distributive characteristics on slope surface was studied by the rare earth element(REE) tracing method. The results show that the REE tracing method can be used to precisely determine the relative erosion amount on different topographical parts in slope surface, and to reveal the changing trends of erosion amount on the different part in the process of soil erosion. It was concluded that the distribution pattern of erosion with the rainfall time expressed three types, they were increase-decreasing type, increasing type and wave type. The highest erosion part located in middle part of slope surface, moved down with rainfall lasting.=
【Fund】: 国家自然基金项目 (4 0 4710 79);; 中科院知识创新工程 (KZCX1 0 6 0 2 0 5 )项目
【CateGory Index】: S157
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