地理科学

地理科学 ›› 2010, Vol. 30 ›› Issue (1): 103-107.doi: 10.13249/j.cnki.sgs.2010.01.103

• 论文 • 上一篇    下一篇

三峡水库蓄水以来长江中下游干流河床沉积物粒度变化的初步研究

徐晓君1,2, 杨世伦1, 张珍1   

  1. 1. 华东师范大学 河口海岸学国家重点实验室, 上海 200062;
    2. 上海市浦东教育发展研究院, 上海 200135
  • 收稿日期:2009-02-12 修回日期:2009-06-11 出版日期:2010-01-20 发布日期:2010-01-20
  • 通讯作者: 杨世伦,教授。E-mai:lslyang@sklec.ecnu.edu.cn E-mail:lslyang@sklec.ecnu.edu.cn
  • 作者简介:徐晓君(1983- ),男,上海人,硕士研究生,主要从事沉积动力过程研究。E-mail:xuxiaojun365@sina.com通讯作者:杨世伦,教授。E-mail:slyang@sklec.ecnu.edu.cn① 长江水利委员会.长江泥沙公报.2003~2006.
  • 基金资助:
    国家自然科学基金创新研究群体项目(40721004)、科技部国家重点实验室科研业务课题(2008KYYW01)。

Variation in Grain Size of Sedimentin Middle and Lower Changjiang River Since Impoundment of Three Gorges Reservoir

XU Xiao-jun1,2, YANG Shi-lun1, ZHANG Zhen1   

  1. 1. State Key Labotory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062;
    2. Shanghai Pudong Institute of Education Development, Shanghai 200135
  • Received:2009-02-12 Revised:2009-06-11 Online:2010-01-20 Published:2010-01-20

PDF (PC)

赞

被引次数

50 | 12

摘要： 于2008年在宜昌至徐六径之间的1 600 km干流河道进行30个横断面取样和分析,与前人于三峡水库蓄水前的取样分析资料进行对比。结果表明:①三峡水库蓄水以来坝下游约400 km的干流河床(宜昌至城陵矶)沉积物出现全程粗化,越近大坝粗化越明显,这种沉积物粗化与水库蓄水后坝下游河床出现的强烈侵蚀密切相关;②蓄水前后城陵矶以下的1 200 km干流河床沉积物粒度的沿程趋势基本一致;③蓄水后河床沉积物仍保持沿程向下游变细且越近河口变化越缓慢的格局。

Abstract: As the core of fluvial geomorphology, sediment parameters reflect the sedimentary environment in river system. The impoundment of the Three Gorges Dam (TGD) is a doubtless inducement of the erosion of the middle and lower Changjiang (Yangtze) River channel. Compared the sediment samples data collected before TGD and after TGD, we dig out some rules which reflect the impact of the TGD. The results show that 1) caused by the erosion, the grain size of sediment coarsened intensively from Yichang to Chenglingji. Where closed to TGD, the tendency of coursing behaves more apparent. 2) The variation in grain size seems to be inconspicuous from Chenglinji to river mouth during 2002-2006. 3) The sediment component tends to be finer along the river downstream to river mouth.

中图分类号: 

  • F512.2