Environmental bottom characterization required for modeling and prediction of high-frequency acoustic bottomscattering

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Abstract
Modeling and prediction of acoustic bottom scattering require characterization of sediment geoacoustic and bottom roughness properties. Data, from five recent shallow‐water acoustic experiments, are presented on the temporal and spatial variability of values of those bottom parameters thought to be important to bottomscattering. The importance of hydrodynamic and biological processes in controlling relevant sediment geoacoustic and roughness properties is also discussed. An improved understanding of which physical scattering processes dominate bottom scattering at different frequencies, beamwidths, pulse lengths, and grazing angles is required to predict bottomscattering from environmental properties. [Work supported by NORDA.]

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