ASA 129th Meeting - Washington, DC - 1995 May 30 .. Jun 06
2pUW27. Three-dimensional acoustic/geoacoustic propagation modeling of the
New Jersey Atlantic generating station site.
Mohsen Badiey
Ocean Acoust. Prog., Office of Naval Res., Arlington, VA 22217
George Botseas
Ding Lee
Naval Undersea Warfare Ctr., New London, CT 06320
William L. Siegmann
Rensselaer Polytechnic Inst., Troy, NY 12180
Propagation effects of 3-D geological features in shallow water sediment
layers at the Atlantic generating station (AGS) continental shelf site are
investigated. Profiles of compressional and shear sound speed, attenuation, and
density have been generated from 23 available geological cores at the AGS site
and discussed in connection with a recent acoustic experiment conducted there
[Badiey et al., 3593--3604 (1994)]. A 3-D geoacoustic data set is
constructed from these profiles using interpolation schemes based on Akima
splines and on krieging. Correlation properties of the sound speeds and density
fields clearly show the existence of sublayer geological features. The
geoacoustic fields, along with detailed bathymetry and water sound speed, are
used for input a 3-D frequency domain PE propagation model. Both 3-D and Nx2-D
simulations are performed over a circular region corresponding to the
experimental configuration. Relative influences of sediment sound-speed
structure and water--sediment interface topography on transmission loss are
determined for frequencies up to 1 kHz. Simulation results are compared with
spectra obtained from the broadband experimental transmission loss.