DOI: 10.1002/2015GL066131
论文题名: Influence of sediment cohesion on deltaic shoreline dynamics and bulk sediment retention: A laboratory study
作者: Straub K.M. ; Li Q. ; Benson W.M.
刊名: Geophysical Research Letters
ISSN: 0094-8418
EISSN: 1944-8149
出版年: 2015
卷: 42, 期: 22 起始页码: 9808
结束页码: 9815
语种: 英语
英文关键词: autogenics
; cohesion
; deltas
; stratigraphy
Scopus关键词: Adhesion
; Sea level
; Stratigraphy
; Autogenics
; Channel formation
; Cohesion
; Deltas
; Fine-grained sediment
; Laboratory studies
; Physical experiments
; Sediment retention
; Sediments
; backwater
; channelization
; cohesion
; delta
; deltaic sedimentation
; fine grained sediment
; flooding
; laboratory method
; lithostratigraphy
; morphodynamics
; regression
; retention
; shoreline change
; transgression
英文摘要: While boundary and forcing conditions influence the average location of a shoreline in deltaic systems, internal morphodynamics can drive high-magnitude deviations from the long-term trend. Here we explore the role of sediment cohesion on these morphodynamics using physical experiments. Specifically, we explore the role of sediment cohesion on the scales of autogenic shoreline transgressions and regressions. Results indicate that sediment cohesion enhances the time and space scales associated with autogenic cycles of channel formation, elongation, and abandonment. In systems with high sediment cohesion, this cycle can drive shoreline transgressions that produce flooding surfaces in the resulting stratigraphy which could be confused with surfaces produced by increases in sea level rise or subsidence rates. Enhanced channelization resulting from sediment cohesion also increases the pumping of fine-grained sediment into the marine realm, where it can bypass the delta foreset, thus decreasing total delta sediment retention rate. Key Points Sediment cohesion on its own is inversely related to deltaic sediment retention Sediment cohesion increases scales of autogenic shoreline transgressions Autogenic shoreline transgressions scale with backwater length in deltas. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84956905386&doi=10.1002%2f2015GL066131&partnerID=40&md5=d6b0e2c7470dc27c8c8208b57d19c791
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8034
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Department of Earth and Environmental Sciences, Tulane University of Louisiana, New Orleans, LA, United States
Recommended Citation:
Straub K.M.,Li Q.,Benson W.M.. Influence of sediment cohesion on deltaic shoreline dynamics and bulk sediment retention: A laboratory study[J]. Geophysical Research Letters,2015-01-01,42(22).