PDF(3363 KB)
Inversion of multi-beam seabed backscatter data in complex sediment areas
JinHua LUO
Prog Geophy ›› 2026, Vol. 41 ›› Issue (3) : 1407-1416.
PDF(3363 KB)
PDF(3363 KB)
Inversion of multi-beam seabed backscatter data in complex sediment areas
Seabed characterization based on multi-beam seabed Backscatter Strength (BS) data classifies the seabed as a certain type in the sampling results, which may lead to misclassification in complex sediment areas (including different sediment mixing areas, transition areas, etc.). Currently, there is a lack of reliable analysis and evaluation methods for interpreting the complex sediment areas based on multi-beam seabed BS data. To solve this problem, this article first references seabed samplers to statistic the backscatter data of typical sediment, and obtained its Probability Density Function (PDF). Based on this, (1) for the sediment mixing zone, an equation is established by using a combination of above-mentioned typical PDF to approximate the PDF of the measured BS data, and the steepest descent method is used to solve the proportion of each typical PDF; (2) A qualitative analysis method is proposed for seabed between two typical seabeds, as well as transition zones between different seabeds, based on the PDF of their BS and its skewness, kurtosis, cumulative distribution function, etc. This paper provides a reliable quantitative inversion and qualitative evaluation method for complex seabed areas, where often with characterization errors using conventional methods. It can also be used as an effective means of analyzing the entire area based on BS data when seabed sampling is insufficient.
Multi-beam seabed backscatter strength / Seabed characterization / Complex seabed / Gaussian mixture model / Statistical distribution
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