Modelling Scattering from Simple Three-Dimensional Bathymetric Features using Wavefield Superposition

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Authors
  1. Fawcett, J.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN)
Abstract
In this report we describe a method for modelling the scattering from three-dimensional bathymetric features on the seabed. In particular, the features are taken to be azimuthally symmetric about the z-axis. This approach could model seamount or basin type features or at higher frequencies, smaller protuberances and depressions. The method uses a set of point sources within the scattering region and exterior to the region and to satisfy the appropriate continuity and boundary conditions along scattering features and seabed/water interface. Multi-frequency and Fourier-synthesized time domain responses for the scattering from such features are presented. In addition we present a semi-analytic model solution which can be used as a benchmark for a bathymetric feature in a halfspace with only a change in density.

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Report Number
DRDC-ATLANTIC-TM-2006-086 — Technical Memorandum
Date of publication
01 Aug 2006
Number of Pages
30
DSTKIM No
CA029021
CANDIS No
527213
Format(s):
CD ROM

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