TRANSIENT RIPPLE FORMATION AND SEDIMENT TRANSPORT

Suphat Vongvisessomjai, L.C.J. Munasinghe, P.P. Gunaratna

Abstract


A knowledge of sediment transport rates due to wave action is essential for an understanding of various coastal engineering problems. Many problems have to be resolved before successful measurement can be made for sediment transport rates due to waves. Since gradients of sediment transport cause changes of beach morphology, the sediment transport rate outside breaker can be determined from measured beach changes. Measurements of ripple growth and migration yield their mathematical descriptions in the same manner as those of surface waves. Expressions of sediment transport rates are then derived. It is found from the study that the sediment transport rates are strongly controlled by the rates of growth and migration of ripples.

Keywords


sediment transport; ripple; ripple formation; transient ripples

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