Extending the Capability of the Complex Effective Depth Approximation
AbstractIn this paper, we extend the effective-depth method to include two boundary features that can effect propagation in shallow water. First, we show how the coherent scattering effects due to a rough sea-surface can be accommodated within the context of the Kirchhoff approximation. Second, we demonstrate how the basic equations can be readily modified to take into account a layered ocean bottom structure. As a result, the complex effective-depth approach can be applied without difficulty to a more general class of shallow water propagation environments. Following a brief summary of the necessary equations and iteration algorithm, we present an example that exhibits the effects on normal mode propagation for a Pekeris type waveguide having a layered ocean bottom and a rough surface.
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