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Planform characteristics and development of interchannel wetlands in a gravel-bed anastomosing river, Maqu Reach of the Upper Yellow River
Liu Boyi1,2; Wang Suiji1,2
2017-11-01
Source PublicationJOURNAL OF GEOGRAPHICAL SCIENCES
ISSN1009-637X
Volume27Issue:11Pages:1376-1388
Corresponding AuthorWang Suiji(wangsj@igsnrr.ac.cn)
AbstractBoth interchannel wetlands and multi-channels are crucial geomorphologic units in an anastomosing river system. Planform characteristics and development of interchannel wetlands and multi-channels control the characteristics of anastomosing rivers. To understand the role that interchannel wetlands play in the development of anastomosing rivers, a study was conducted on the Maqu Reach of the Upper Yellow River (MRUYR), a gravel-bed anastomosing river characterized by highly developed interchannel wetlands and anabranches. Geomorphologic units in the studied reach were extracted from high resolution satellite imagery in Google Earth. The size distributions of interchannel wetlands and interchannel wetland clusters (IWCs), a special combination of interchannel wetlands and anabranches, were investigated. Geomorphologic parameters, including the ratio of interchannel wetland area to IWC area (P), shoreline density (D-l), and node density (D-n) were used to analyze planform characteristics of IWCs and the development of multi-channels in the studied reach. The results suggest that small or middle sized interchannel wetlands and large or mega sized IWCs are more common at the study site. The area of IWC (S-u) is highly correlated with other geomorphologic parameters. P increases with increasing S-u, and the upper limit is about 80%, which indicates that the development of interchannel wetlands and anabranches in the IWC is in the equilibrium stage. In contrast, D-l and D-n show a tendency to decrease with increasing S-u due to diverse evolution processes in IWCs with different sizes. There are three main reasons leading to the formation of IWCs: varying stream power due to the meandering principal channel; development of the river corridor due to the weakening of geologic structure control; and high stability of interchannel wetlands due to conservation by shoreline vegetation.
Keywordchannel planform gravel-bed anastomosing river interchannel wetland geomorphologic parameter Yellow River
DOI10.1007/s11442-017-1441-1
WOS KeywordUPPER COLUMBIA RIVER ; BRITISH-COLUMBIA ; CHANNEL PLANFORM ; ISLAND FORMATION ; BRAIDED-RIVER ; SOURCE REGION ; CANADA ; SEDIMENTATION ; DIVERSITY ; EVOLUTION
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41571005] ; National Natural Science Foundation of China[41271027]
Funding OrganizationNational Natural Science Foundation of China
WOS Research AreaPhysical Geography
WOS SubjectGeography, Physical
WOS IDWOS:000413227400006
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/62461
Collection中国科学院地理科学与资源研究所
Corresponding AuthorWang Suiji
Affiliation1.Chinese Acad Sci, Key Lab Water Cycle & Related Land Surface Proc, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Liu Boyi,Wang Suiji. Planform characteristics and development of interchannel wetlands in a gravel-bed anastomosing river, Maqu Reach of the Upper Yellow River[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2017,27(11):1376-1388.
APA Liu Boyi,&Wang Suiji.(2017).Planform characteristics and development of interchannel wetlands in a gravel-bed anastomosing river, Maqu Reach of the Upper Yellow River.JOURNAL OF GEOGRAPHICAL SCIENCES,27(11),1376-1388.
MLA Liu Boyi,et al."Planform characteristics and development of interchannel wetlands in a gravel-bed anastomosing river, Maqu Reach of the Upper Yellow River".JOURNAL OF GEOGRAPHICAL SCIENCES 27.11(2017):1376-1388.
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