High Resolution Bathymetry and Backscatter of a High-Frequency Test Area
STATE UNIV OF NEW YORK AT STONY BROOK MARINE SCIENCES RESEARCH CENTER
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Our long-term goal is to understand the processes which create and modify the sea bed and the acoustic properties of the bed in the coastal zone and to understand how seabed morphology and acoustical properties can be studied using high-resolution swath mapping techniques bathymetry and backscatter. We used SUNY Stony Brook s EM 3000 multibeam echosounder, a research-grade shallow-water multibeam echosounder operating at 300 kHz, to produce a high-resolution map of the sea bed bathymetry and backscatter in the High Frequency Sound Interaction in Ocean Sediments DRI SAX99 study area. The prime study area is about 600 m by 600 m at a water depth of 18 m. We collected highly overlapping data to characterize bottom topography, bottom roughness and backscatter patterns immediately prior to the emplacement of bottom equipment and provided information crucial to the deployment of instruments during the experiment. Subsequent analysis has concentrated on better quantifying local variations in backscatter and topography. We now seek to use this unique highdensity data set to 1- characterize lateral variability in the DRI study area 2- develop new approaches to rapidly processing multibeam sonar data and 3- produce statistically robust representations of seafloor topography and backscatter in order to develop approaches for the remote characterization of seafloor properties and to understand the factors causing the observed backscatter patterns.
- Physical and Dynamic Oceanography