USGS Western Region Coastal and Marine Geology

Torresan, M.E., and Gardner, J.V.,2000, Acoustic Mapping of the Regional Seafloor Geology in and Around Hawaiian Ocean Dredged-Material Disposal Sites, U.S. Geological Survey Open-file Report 00-124.

Figure 13 - Conventional 59-kHz single-beam sidescan sonar imagery off of south O'ahu.

Compare to Figure 12. Disposal sites and dredged material deposits appear as isolated circular high-backscatter features that coalesce to form a nearly continuous high-backscatter blanket. In both Figures 12 and 13, submerged reefs are characterized by high backscatter whereas natural sediment is characterized by low backscatter. Note that artifacts visible in the sidescan data are not present in multibeam map by comparing Figures 12 and 13.

go to larger version of Figure 12 (1.9MB)
go to metadata for this field activity, K-1-93-HW

[Fig 13 1993 Sidescan Mosaic Map ]

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Maintainer: Susan A. Cochran
Last modified: 13 Dec 2000

U.S. Department of the Interior, U.S. Geological Survey, Western Region Coastal and Marine Geology