地理科学进展 ›› 2010, Vol. 29 ›› Issue (5): 565-571.doi: 10.11820/dlkxjz.2010.05.008

• 资源与环境 • 上一篇    下一篇

黄土丘陵沟壑区典型流域土地利用变化对水沙关系的影响

刘淑燕1, 余新晓1, 信忠保1, 李庆云1, 李海光1, 雷凤燕2   

  1. 1. 水土保持与荒漠化防治教育部重点实验室,北京林业大学水土保持学院,北京 100083;
    2. 内蒙古通辽市绿色食品发展中心,通辽 028000
  • 收稿日期:2010-01-01 修回日期:2010-03-01 出版日期:2010-05-25 发布日期:2010-05-25
  • 作者简介:刘淑燕(1979-),女,内蒙古赤峰人,在读博士,主要从事生态水文、水土保持方面的研究.E-mail: lshyaaa@126.com
  • 基金资助:

    国家自然科学基金资助项目(40871136).

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

摘要:

以黄土丘陵沟壑区内相邻的2条支沟(桥子东沟和桥子西沟)为研究对象,基于遥感影像获得土地利用数据,利用水文站1986-2004年观测的次降雨-径流-泥沙过程资料,研究了小流域土地利用变化(主要以增加水土保持措施为主)对径流输沙的影响.结果表明:在黄土丘陵沟壑区,增加土地利用/土地覆被能够有效地减少小流域的径流量、产沙量;在次降雨量、降雨强度较小,土地利用变化不明显的情况下,两流域次降雨水沙关系差异不显著,在次降雨量、降雨强度较大和土地利用变化明显时,两流域次降雨水沙关系差异显著,坡耕地改梯田的农田水利建设可能是导致水沙变化的主要原因.

关键词: 产沙量, 黄土丘陵沟壑区, 径流量, 水沙关系, 土地利用变化

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