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INVESTIGATION A CASE HISTORY OF YELLOW FIN AND DIFFERENTIATION OF SAND AND GRAVEL ON SEAFLOOR BY SIDE SCAN SONAR IMAGES

AUTHOR/S: H. MOHAMMADI, M. S. MONFARED, H. AGHAJANI
Sunday 1 August 2010 by Libadmin2009

9th International Multidisciplinary Scientific GeoConference - SGEM2009, www.sgem.org, SGEM2009 Conference Proceedings/ ISBN 10: 954-91818-1-2, June 14-19, 2009, Vol. 1, 675-680 pp

ABSTRACT

In this article we investigated a practical case history to define and show the differences
of sand and gravel in side scan sonar images. The images were obtained by the Yellow-
Fin side scan sonar instrument and processed with related software. The sound
transmitted by the DSL-120 kHz instrument travels to the seafloor, bounces off of the
seafloor, returns to the instrument, and is recorded. The strength of the sound recorded
by the side-scan sonar instrument converted to shades of gray. A very strong return is
white; a very weak return is black. The return is stronger if the seafloor is made of bare
rock. The strength of the return is much lower if the seafloor is covered by mud or sand.
In this case history the gravels and sands were differentiated as well, the bathymetric
map of the part of the seabed which scanned was also obtained.

Keywords: Side Scan sonar, Bathymetry, Echo sounding, Yellow-fin instrument & software

PAPER 2009/s06.7: INVESTIGATION A CASE HISTORY OF YELLOW FIN AND DIFFERENTIATION OF SAND AND GRAVEL ON SEAFLOOR BY SIDE SCAN SONAR IMAGES

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