QUANTITATIVE DESCRIPTION OF SEDIMENT TRANSPORT BY WAVES

Ole Secher Madsen, William D. Grant

Abstract


With the apparent desire of man to move some of his activities into the offshore region the problems associated with the assessment of the impact of large structures in this environment will be of increasing importance. One of the impacts of a large offshore structure, such as for example the Atlantic Generating Station proposed by Public Service Electric and Gas Company of New Jersey, would be its effect on the wave and current pattern in the vicinity of the structure. These changes in wave and current conditions will induce changes in the sediment transport pattern and may disturb an existing equilibrium thus causing large changes in bottom topography in the vicinity of the structure. These topographical changes may extend all the way to the adjacent shoreline and thus cause deposition in some and erosion in other areas. To assess the severity and extent of topographical changes induced by an offshore structure an ability to quantify not only the effects of the structure on the wave and current pattern but also the mechanics of the interaction of the resulting fluid motion with the bottom sediment is clearly needed. The purpose of this paper is to establish quantitative relationships for the fluid-sediment interaction in this environment.

Keywords


sediment transport; quantitative description

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