| DOI: | 10.1002/2015GL066455
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| 论文题名: | Theory for the curvature dependence of delta front progradation |
| 作者: | Ke W.-T.; Capart H.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8308
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| EISSN: | 1944-8039
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| 出版年: | 2015
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| 卷: | 42, 期:24 | | 起始页码: | 10680
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| 结束页码: | 10688
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| 语种: | 英语
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| 英文关键词: | deltas
; morphodynamics
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| Scopus关键词: | Geometrical optics
; Angle of repose
; Deltas
; Eikonal equation
; Morphodynamics
; Sediment supply
; Sediment supply rates
; Spanwise distribution
; Special properties
; Delta wing aircraft
; analytical method
; bathymetry
; curvature
; delta
; frontal feature
; morphodynamics
; numerical model
; progradation
; sediment transport
; shoreline change
; theoretical study
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| 英文摘要: | When Gilbert-type deltas respond to uneven sediment supply or advance over irregular basin bathymetry, they develop curved, creased fronts prograding at speeds that vary with location along the shoreline. Relations governing the progradation rate, however, have so far been proposed only for simple special cases. In this paper, we exploit the special properties of solutions to the eikonal equation to derive a general progradation relation, applicable to delta fronts of finite angle of repose and arbitrary shoreline planform. In these circumstances, the theory explicitly relates the progradation rate to the local shoreline curvature. We illustrate the resulting morphodynamics with numerical and analytical solutions for a sinuous delta front. The proposed relation can be used to model deltaic evolution or deduce spanwise distributions of sediment supply rates from observations of foreset evolution. © 2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955213506&doi=10.1002%2f2015GL066455&partnerID=40&md5=e132ae04af47f099f2e35c1f8b435251
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/7924
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| 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 Civil Engineering and Hydrotech Research Institute, National Taiwan University, Taipei, Taiwan
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| Recommended Citation: | |
Ke W.-T.,Capart H.. Theory for the curvature dependence of delta front progradation[J]. Geophysical Research Letters,2015-01-01,42(24).
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