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A comparison of near-bed acoustic backscatter and laser diffraction measurements of suspended sediments

Thorne, P.D.; Agrawal, Y.C.; Cacchione, D.A.. 2007 A comparison of near-bed acoustic backscatter and laser diffraction measurements of suspended sediments. IEEE Journal of Oceanic Engineering, 32 (1). 225-235. 10.1109/JOE.2007.890978

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Abstract/Summary

As part of the U.S. Office of Naval Research (ONR, Arlington, VA) mine burial program, an experiment was conducted off the pier at Santa Cruz, CA, to measure the near-bed suspended sediment reference concentration under waves and currents. Two tripods were deployed to carry out the measurements; one consisting mainly of acoustical instrumentation and the other solely of optical instruments. The tripods were located within 15 m of one another on a sandy bed and measurements of the suspended sediment were made using acoustics and optics. Although the experiment was not primarily designed to conduct an intercomparison of acoustical and optical measurements, it was considered interesting to take advantage of the situation and to examine if these two techniques gave comparable results. In particular, measurements of particle size and concentration, obtained using a triple frequency acoustic backscatter system (ABS) have been compared with the commercially available laser miniature scattering and transmissometry instrument (MSCAT). It was found that the mean grain size estimated by the two methods was consistent, however, in contrast, the concentration time series showed differences, both in magnitude and form

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1109/JOE.2007.890978
Programmes: Oceans 2025 > Shelf and coastal processes
ISSN: 0364-9059
Additional Information. Not used in RCUK Gateway to Research.: Special issue "Mine burial prediction" Agrawal, Y. C. Sequoia Sci Inc, Bellevue, WA 98005 USA Cacchione, D. A. CME, Reno, NV 89511 USA
Additional Keywords: REF ISI NISCOCT07 AR0708 OPM2007 HIJ AJWOCT07 JOURNAL LLH3301 OCEANS 2025 PROG2 THEME 3 OVERSEAS CO-AUTHORS ACOUSTICS BACKSCATTER LASER OPTICS SEDIMENTS SUSPENSIONS PARTICLE SIZE OPTICAL BACKSCATTER SAND SCATTERING
NORA Subject Terms: Marine Sciences
Date made live: 13 Oct 2008 10:16
URI: http://nora.nerc.ac.uk/id/eprint/2656

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