中文

Chinese Journal of Nature ›› 2008, Vol. 30 ›› Issue (1): 28-31.

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Study on Sediment-yield Characteristics of Different Land Use in Loess Hilly Region

Lian Zhenlong①，Liu Puling②，Xu Xuexuan③，He Ping④   

  1. ①Graduate Student，②③Professor，Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources,
    State Key Laboratory of Soil Erosion and Dryland Farming On the Losse Plateau, YangLing,712100 Shaanxi,China ;
    ④Asistont Engineer，AnSai Agro-economy Administration, AnSai, 717400，Shaanxi,China
  • Received:2007-12-13 Revised:2007-12-13 Online:2008-02-20 Published:2008-02-20

Abstract: By analysis of the data of field simulated rainfalls, this paper makes the conclusion that in the Loess Hilly Region, the critical rainfall intensity that can distiguish the two main runoff-production modes on grass and bushes ranges from 1.40 mm/min to 1.45mm/min. And on bare sloping field, the critical rainfall intensity that make sharp transfomation of sediment-yield intensity ranges from 1.50mm/min to 1.53mm/min. At the same time, this paper talks over the sediment-yield charicterdistics of different land use, and finds their corelative equation. Results indicate the great benefits of vegetation on decreasing slope soil erosion.