中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Study of sedimentation zones in a large sand-bed braided river: an example from the Hanjiang River of China

文献类型:期刊论文

作者Xu, JX
刊名GEOMORPHOLOGY
出版日期1997-12-01
卷号21期号:2页码:153-165
关键词Sedimentation Zone Braided Channel Mid-channel Bars Channel Adjustment Complex Response
文献子类Article
英文摘要The concept of sedimentation zone is applied to the study of spatial and temporal variations of mid-channel bars in the middle Hanjiang River, a large sand-bed braided river in China. The river channel can be divided into alternating sedimentation zones and transport zones, the formation of which is basically controlled by local channel boundary conditions such as natural and artificial bank controls (bedrock outcrops, local hill spurs, terraces, artificial dikes and influence of tributaries). A systematic comparison between sedimentation and transport zones is made in this study, including the flow shear stress, stream power, mid-channel bar features and channel stability. The results obtained indicate that different channel boundary conditions in sedimentation and transport zones control channel width and width-depth ratio, which in turn control the reach's hydraulic and sediment transport characteristics. The storage and removal of sediment in sedimentation zones correspond to the increase and decrease of the degree to which mid-channel bars develop. When the sediment input of the channel system is altered by reservoir construction, the bed-load sediment historically accumulated is released by clear water scour, thus a macroscopic bed-load 'wave' forms and moves gradually downstream. Associated with this is the complex response phenomenon of mid-channel bar evolution. (C) 1997 Elsevier Science B.V.
语种英语
WOS记录号WOS:000071221000004
出版者ELSEVIER SCIENCE BV
源URL[http://ir.igsnrr.ac.cn/handle/311030/68163]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, JX
作者单位Chinese Acad Sci, Inst Geog, Beijing 100101, Peoples R China
推荐引用方式
GB/T 7714
Xu, JX. Study of sedimentation zones in a large sand-bed braided river: an example from the Hanjiang River of China[J]. GEOMORPHOLOGY,1997,21(2):153-165.
APA Xu, JX.(1997).Study of sedimentation zones in a large sand-bed braided river: an example from the Hanjiang River of China.GEOMORPHOLOGY,21(2),153-165.
MLA Xu, JX."Study of sedimentation zones in a large sand-bed braided river: an example from the Hanjiang River of China".GEOMORPHOLOGY 21.2(1997):153-165.

入库方式: OAI收割

来源:地理科学与资源研究所

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