Beach Preservation by Means of Offshore Submerged Mound of Dredged Materials

by Ali Gunyakti, K. A. U. Coll of Engineering, Jeddah, Saudia Arabia, K. A. U. Coll of Engineering, Jeddah, Saudia Arabia,



Document Type: Proceeding Paper

Part of: Coastal Zone '87

Abstract:

The beach - sediment - dispersion- offshore or alongshore under the effect of waves and wave induced currents, and inland by wind action may cause a net deficit in sediment budget which results in continuous erosion of beaches. To save the beaches under erosion an artificial nourishment is needed. One of the artificial - beach - nourishment methods is to deposit the sand obtained from dredging of a harbor, an entrance channel, sea bottom, or accreation around coastal structures, in the form of submerged mounds offshore of the natural breaking zone. Its successful application depends upon: (i) the mode of sediment movement in surfzone, (ii) the mobility of deposited sediments, and (iii) the geometric characteristics such as location, shape and dimensions of the submerged mound.

Subject Headings: Sediment transport | Beach protection and nourishment | Dredged materials | Submerging | Coastal management | Erosion | Beaches

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