A Study on sediment sources in a small watershed by using REE tracer method  

作　　者：石辉 田均良 刘普灵 周佩华 

机构地区：[1]Institute of Soil and Water Conservation, Chinese Academy of Sciences, Yangling 712100, China

出　　处：《Science China(Technological Sciences)》1997年第1期12-20,共9页中国科学（技术科学英文版）

基　　金：Project partly supported by the National Natural Science Foundation of China.

摘　　要：In simulation experiments, rare earth element (REE) tracer method was first used to sludy the sources of sediment yield in a small watershed. The experimental results have shown that the chief parts of sediment sources are constantly changing with the development of gullies. The cutting erosion plays a major role in the primary stage of watershed development. Slope erosion intensity increased gradually with gully development of the watershed, while gully erosion intensity decreased. Similar process was also observed in an individual rainfall. The simulation experiments have shown that the method can satisfactorily interpret the origins of sediment yield of a small watershed on an effective way. The simulation experiments have also provided basic information for field researches.In simulation experiments, rare earth element (REE) tracer method was first used to sludy the sources of sediment yield in a small watershed. The experimental results have shown that the chief parts of sediment sources are constantly changing with the development of gullies. The cutting erosion plays a major role in the primary stage of watershed development. Slope erosion intensity increased gradually with gully development of the watershed, while gully erosion intensity decreased. Similar process was also observed in an individual rainfall. The simulation experiments have shown that the method can satisfactorily interpret the origins of sediment yield of a small watershed on an effective way. The simulation experiments have also provided basic information for field researches.

关 键 词：SMALL WATERSHED REE TRACING SEDIMENT source. 

分 类 号：P512.2[天文地球—地质学]