Nearshore Sand Sources for American Samoa: An Alternative to Using Beach Sand

by John R. Dingler, US Geological Survey, Menlo Park, CA, USA,
Thomas E. Reiss, US Geological Survey, Menlo Park, CA, USA,

Document Type: Proceeding Paper

Part of: Coastal Zone '87


Using a combination of geophysical techniques, in situ observations, and sampling by scuba divers, we investigated along the south shore of Tutuila Island, American Samoa, for nearshore sand deposits. To minimize the impact of future sand dredging on the island's littoral sediments, the search took place in a narrow zone between the outside of the fringing reef and the 30-m bathymetric contour. Because the sand will be used by the Samoans in a variety of ways, an area high in siliciclastic sand - Nua-Se'etaga Bay - and two areas containing only carbonate sand - Faga'itua Bay and Nafanua Bank - were inspected in detail. Results of the exploration program are discussed.

Subject Headings: Sand (hydraulic) | Soil analysis | Sandy soils | Nearshore | Developing countries | Beaches | Dredging | Littoral drift | American Samoa | United States

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