DOI: 10.1002/2014GL061918
论文题名: Testing morphodynamic controls on the location and frequency of river avulsions on fans versus deltas: Huanghe (Yellow River), China
作者: Ganti V. ; Chu Z. ; Lamb M.P. ; Nittrouer J.A. ; Parker G.
刊名: Geophysical Research Letters
ISSN: 0094-9609
EISSN: 1944-9340
出版年: 2014
卷: 41, 期: 22 起始页码: 7882
结束页码: 7890
语种: 英语
英文关键词: alluvial fan
; avulsions
; backwater
; delta
; Huanghe
; shoreline
Scopus关键词: Water
; Alluvial fans
; avulsions
; backwater
; delta
; Huanghe
; shoreline
; Rivers
; alluvial fan
; avulsion
; flood
; frequency analysis
; hydrodynamics
; morphodynamics
; morphology
; shoreline
; slope
; timescale
; China
; Loess Plateau
; Shandong
; Yellow River Estuary
英文摘要: A mechanistic understanding of river avulsion location and frequency is needed to predict the growth of alluvial fans and deltas. The Huanghe, China, provides a rare opportunity to test emerging theories because its high sediment load produces regular avulsions at two distinct nodes. Where the river debouches from the Loess Plateau, avulsions occur at an abrupt decrease in bed slope and reoccur at a time interval (607 years) consistent with a channel-filling timescale set by the superelevation height of the levees. Downstream, natural deltaic avulsions reoccur at a timescale that is fast (7 years) compared to channel-filling timescale due to large stage-height variability during floods. Unlike the upstream node, deltaic avulsions cluster at a location influenced by backwater hydrodynamics and show evidence for episodic downstream migration in concert with progradation of the shoreline, providing new expectations for the interplay between avulsion location, frequency, shoreline rugosity, and delta morphology. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923325855&doi=10.1002%2f2014GL061918&partnerID=40&md5=42a6f680c22527fc2d7e7b03a018e65d
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6873
Appears in Collections: 气候减缓与适应
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作者单位: Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA, United States
Recommended Citation:
Ganti V.,Chu Z.,Lamb M.P.,et al. Testing morphodynamic controls on the location and frequency of river avulsions on fans versus deltas: Huanghe (Yellow River), China[J]. Geophysical Research Letters,2014-01-01,41(22).