Onshore sediment transport on a sandy beach under varied wave conditions: Flow velocity skewness, wave asymmetry or bed ventilation?

被引：28

作者：

Austin, Martin ^{[1
]}

Masselink, Gerhard ^{[2
]}

O'Hare, Tim ^{[1
]}

Russell, Paul ^{[1
]}

机构：

[1] Univ Plymouth, Sch Earth Ocean & Environm Sci, Plymouth PL4 8AA, Devon, England

[2] Univ Plymouth, Sch Geog, Plymouth PL4 8AA, Devon, England

来源：

MARINE GEOLOGY | 2009年 / 259卷 / 1-4期

基金：

英国自然环境研究理事会;

关键词：

suspended sediment; cross-shore transport; flow velocity acceleration; bed ventilation; flow velocity skewness; flow velocity asymmetry; macrotidal beach; SWASH INFILTRATION-EXFILTRATION; OPTICAL BACKSCATTER SENSORS; SHEET FLOW; INNER-SURF; ZONE; DYNAMICS; GENERATION; MORPHOLOGY; EVOLUTION; FLUXES;

D O I：

10.1016/j.margeo.2009.01.001

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Measurements of the cross-shore suspended sediment flux obtained from a planar and barred beachface have been used to investigate the propensity for wave-driven onshore sediment transport during medium energy conditions. Three processes capable of transporting sediments onshore-flow velocity skewness, wave asymmetry and bed-ventilation were investigated to determine their relative importance. Onshore-directed flow accelerations under the steep front face of asymmetric waves were significantly correlated with sediment suspension, whilst the effects of flow skewness and bed-ventilation were discounted. An acceleration-modified form of the Meyer-Peter-type formula is used as initial attempt at modelling the onshore transport using a temporal filter to modify the bed shear stresses. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：86 / 101

页数：16