PROGRESS IN GEOGRAPHY ›› 2010, Vol. 29 ›› Issue (5): 565-571.doi: 10.11820/dlkxjz.2010.05.008

• Original Articles • Previous Articles     Next Articles

Effects of Land Use Change on Runoff-Sediment Relationship at Watershed in the Loess Hilly Region

LIU Shuyan1, YU Xinxiao1, XIN Zhongbao1, LI Qingyun1, LI Haiguang1, LEI Fengyan2   

  1. 1. Key Laboratory of Soil and Water Conservation and Desertification Combating, Ministry of Education,School of Soil and Water Conservation;Soil and Water Conservation College, Beijing Forestry University, Beijing 100083, China;
    2. Green Food Development Ceter in Tongliao 028000, Inner Mongolia, China
  • Received:2010-01-01 Revised:2010-03-01 Online:2010-05-25 Published:2010-05-25

Abstract:

Taking Qiaozidonggou and Qiaozixigou watershed as examples in the loess hilly region, using remote sensing image to obtain land use data, based on the observed rainfall, runoff and sediment data during 1986- 2004, this paper analysed the effects of land use change on runoff-sediment relationship. The results showed that in the loess hilly and gully areas, increasing land use/land cover can reduce effectively the watershed runoff and sediment yield; when rainfall and rainfall intensity were smaller, land-use change was limited and the runoff-sediment relationship had no significant differences. When the rainfall and rainfall intensity and land-use change were significant, the difference of runoff-sediment relationship was obvious. It might be the main reason for sloping land changing into terraced land.

Key words: land-use changes, loess hilly region, runoff, runoff-sediment relationship, sediment yield