地理科学进展

地理科学进展 ›› 2011, Vol. 30 ›› Issue (5): 545-549.doi: 10.11820/dlkxjz.2011.05.004

• 地表过程 • 上一篇    下一篇

藉河流域水沙输移特征及其影响因素分析

王友生1,2, 余新晓1, 贺康宁1, 张振明1, 信忠保1, 李庆云1   

  1. 1. 北京林业大学水土保持学院, 北京 100083;
    2. 甘肃省定西市农业技术推广站, 定西 743000
  • 收稿日期:2010-07-01 修回日期:2011-01-01 出版日期:2011-05-25 发布日期:2011-05-25
  • 通讯作者: 余新晓(1961-). E-mail: yuxinxiao111@126.com E-mail:yuxinxiao111@126.com
  • 作者简介:王友生(1981-),女,汉族,甘肃定西人,博士生,主要从事生态水文研究。E-mail: wangysh2000_1@163.com
  • 基金资助:

    国家自然科学基金项目(40871136)。

Characteristics and Influencing Factors of the Runoff and Sediment Transport in Jihe Watershed

WANG Yousheng1,2, YU Xinxiao1, HE Kangning1, ZHANG Zhengming1, XIN Zhongbao1, LI Qingyun1   

  1. 1. School of Soil andWater Conservation, Beijing Forestry University,Beijing 100083, China;
    2. Dingxi Station for Extending Agricultural Techniques of Gansu Province, Dingxi 743000, China
  • Received:2010-07-01 Revised:2011-01-01 Online:2011-05-25 Published:2011-05-25

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摘要： 本文以1962-1989 年水文资料和雨量站资料为基础,分析了藉河流域水沙的季节及年际变化规律,并且对降雨与人类活动导致的年径流泥沙变化影响进行了估算。研究结果表明,藉河流域水沙年内分配极不均匀,7-10月径流量占全年的61.6%,6-9 月泥沙量占全年的87.9%；水沙年际变化剧烈,输沙量和径流量的变差系数分别为0.725 和0.573,输沙量年际变化强于径流年际变化；径流与泥沙在多年变化中均呈先下降后平缓趋势。20 世纪70年代以来,藉河流域径流泥沙量衰减,主要是水土保持措施发挥了作用。

关键词: 藉河流域, 趋势分析, 水沙变化, 水土保持

Abstract: Based on the hydrologic and area precipitation data during the period of 1962 to 1989, the seasonal and annual changes of runoff and sediment were analyzed, and the influence of precipitation and human activities on the runoff and sediment were estimated. The results showed that the seasonal distribution of runoff and sediment yield was quite uneven. The runoff between July and October accounted for 61.6 percents of the year, and sediment yield from June to September made up 87.9% of the year. The annual distribution of runoff and sediment yield was quite different and the variation coefficients of annual sediment and runoff reached 0.725 and 0.573 respectively. The inter-annual changes of sediment were greater than that of runoff. The trend of runoff and sediment yield in the Jihe watershed declined evidently first and then remained steady during the research period. Soil and water conservation has played an important role in the descending of runoff and sediment discharge since the 1970s.

Key words: changes of runoff and sediment, Jihe watershed, Soil and water conservation, tendency analysis