EFFECTS OF HYDROGRAP'HIC CHANGES DUE TO NEARSHORE DREDGER DUMPING ON WAVE REFRACTION AND LITTORAL SAND BALANCE

Jan M. Jordaan

Abstract


This paper presents a case where, in the development of a harbour, dredged material was dumped in a location where a large accumulation eventually formed. This changed the offshore topography sufficiently to affect the predominant wave refraction conditions. The wave environment along the principal bathing beaches was changed as a result, and a degree of beach erosion ensued which can be ascribed as partly due to the effects of continued dredger dumping in one area.

Keywords


dredging; sediment balance; harbor dredging

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