Acoustic characterization of continental shelf seafloor and benthic habitats using single and multi-beam backscatter data
IR@NIO: CSIR-National Institute Of Oceanography, Goa
View Archive Info| Field | Value | |
| Creator |
Haris, K.
Chakraborty, B. |
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| Date |
2013-07-10T07:06:47Z
2013-07-10T07:06:47Z 2013 |
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| Identifier |
In "First underwater acoustics conference and exhibition. Ed. by: Papadakis, J.S.; Bjorno, L."; 2013; 1045-1050.
http://drs.nio.org/drs/handle/2264/4326 |
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| Description |
Satellite based marine remote sensing is a conventional technique for oceanographic research studies. Likewise, in the future projection application of the acoustic remote sensing using high frequency single-beam echo-sounder (SBES) and multi-beam echo-sounder (MBES) sonar imagery could provide a wealth of data to facilitate ocean multidisciplinary studies including seafloor characterization and benthic habitat studies. Correspondingly, the acoustic backscatter from MBES and SBES systems operable at 95 kHz and 33/210 kHz, respectively, were used to characterize sediment texture and benthic macrofauna along the central part of the western continental shelf of India (off Goa). Concurrent acoustical, physical, and biological parameters were measured to characterize the continental shelf seafloor. The substrate type and roughness of the seafloor were estimated using the composite roughness scattering model with the measured backscatter data. The relationships between processed acoustic backscatter strength, grain size, sediment geoacoustic inversion results and benthic macro-fauna abundance were identified from the maps generated using ArcGIS. Distinct interclass separations between the sediment provinces are evident from the spatial variability of the estimated inversion results, which simultaneously establish a strong correlation with backscatter values and biologically active faunal functional group assemblages on the seafloor. Finally, to further understand the complexity of seafloor backscattering processes, a more versatile 'multifractal' approach based technique (using SBES echo-envelope data) has been introduced. The application of multifractal technique could substantiate the hitherto applied numerical inversion based characterization of the seafloor sediments employing the backscatter data.
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| Language |
en
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| Publisher |
Institute of Applied & Computational Mathematics
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| Rights |
Copyright [2013]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
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| Subject |
ocean floor
benthos mathematical models echosounders |
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| Title |
Acoustic characterization of continental shelf seafloor and benthic habitats using single and multi-beam backscatter data
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| Type |
Journal Article
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