Mapping sediment acoustic impedance using remote sensing acoustic techniques in a shallow-water carbonate environment |
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| Authors: | Donald J Walter Douglas N Lambert David C Young Kevin P Stephens |
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| Institution: | (1) Naval Research Laboratory/Code 7431, Stennis Space Center, MS 39529-5000, USA, US |
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| Abstract: | Real-time trackline plots of surficial sediment acoustic impedance delineate several sedimentary facies off Garden Key in
the Dry Tortugas. The sea floor within a 6×6 km surveyed area consists of carbonate muds (silts), sands and shell, rock, and
live corals. The 4-kHz acoustic data supports this finding by providing a pictographic representation of the distribution
and structure of several sediment facies types. Plotting the gridded acoustic data with commercial mapping software (Surfer)
provides a three-dimensional (3D) perspective of the bottom topography with a color contour map of surficial sediment impedance
(upper 0.4 m) draped over the 3D surface. |
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