DOI: 10.1016/j.earscirev.2020.103358
论文题名: Multiple intertidal bars on beaches: A review
作者: Biausque M. ; Grottoli E. ; Jackson D.W.T. ; Cooper J.A.G.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 210 语种: 英语
中文关键词: Intertidal systems
; Morphodynamics
; Multiple sandbars
; Ridge and runnel
; Surf zone
英文关键词: beach profile
; erosion
; intertidal environment
; morphodynamics
; sandbar
; surf zone
; Blackpool [England]
; England
; United Kingdom
英文摘要: Ridge and runnel features were originally described by King and WiIliams (1949) from observations at Blackpool beach (U.K.) and laboratory experiments. They were characterised as intertidal, shore-parallel sandbars (ridges), commonly 2–6 bars in total, and disconnected from each other by troughs (runnels). The nomenclature ‘ridge and runnel’ was, however, also used by Hayes (1967) to describe multiple-barred beaches but referring to subtidal bars. The more specific term ‘Multiple Inter-Tidal Bars’ (MITB) was subsequently adopted for intertidal beaches exhibiting successive shore-parallel sandbars. To date, a detailed understanding of the formation of MITB has remained elusive and their precise definition is still unclear. It has been suggested that MITB features are the result of both swash and surf zone processes acting on the intertidal beach profile. These processes are involved in the formation, the long-term persistence, and behaviour of MITB. Despite the long-term persistence of MITB systems they are dynamic at short timescales. Ridge crest positions are regularly modified over each tidal cycle by successive surf and swash processes. At seasonal scales, ridges may undergo erosion and cross-shore migration under high energy conditions (winter) while ridges are well developed during summers. Via a meta-analysis of 93 separate published works at 67 sites globally, we define MITB, characterise their morphodynamics and assess their global distribution. Our study shows that the distribution of MITB is a function of thresholds in beach slope (<0.02), tidal range (3–10 m), and wave period (3–8 s). They are developed at sites with sufficient sediment supply, limited wind and wave fetch, meso- to macrotidal (>3 m) and on low gradient (wide) intertidal beach slopes. © 2020 The Author(s) Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166008
Appears in Collections: 气候变化与战略
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作者单位: School of Geography & Environmental Sciences, Ulster University, Cromore Road, Coleraine, Northern Ireland, United Kingdom; Discipline of Geology, University of KwaZulu-Natal, Durban, South Africa
Recommended Citation:
Biausque M.,Grottoli E.,Jackson D.W.T.,et al. Multiple intertidal bars on beaches: A review[J]. Earth Science Reviews,2020-01-01,210