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- W2016157613 abstract "Recent theoretical modeling has shown that the size-distribution of inclusions in marine sediments, such as gravel-sized grains and shells embedded in sandy bottoms, is critical for high-frequency scattering. Analysis of existing data on the bottom scattering strength and sediment ground truth also shows that the backscatter data are primarily responsive to the coarse contents of the sediment. Previous ground truth data analysis, usually based on the sediment sieving, assumed that particles are nearly spherical, so that the sieve size is approximately equal to the equivalent diameter (diameter of sphere with the same volume). Coarse particles, such as shell fragments, however, appear to be very nonspherical. Therefore, a relationship between the particle sieve size and equivalent diameter, defined by the particle shape, is needed to provide required size-distributions for acoustic scattering models. Recent statistical analysis of sediment samples collected during the SAX04 experiment resulted in a set of such empiric relationships, and also provided estimating the particle shape factor, known to be an important parameter in the sediment transport processes. Obtained size distributions were used for calculations of frequency-angular dependencies of the bottom backscattering strength and provided a good agreement in the SAX04 scattering data/model comparisons. [Work supported by ONR.]" @default.
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- W2016157613 date "2009-04-01" @default.
- W2016157613 modified "2023-09-23" @default.
- W2016157613 title "High frequency scattering from inclusions in marine sediments: Data/model comparisons." @default.
- W2016157613 doi "https://doi.org/10.1121/1.4783603" @default.
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