Abstract
Acoustic propagation modeling in river environments would take advantage of available environmental data and be relevant to recent work regarding passive threat detection. Normal mode and ray methods will be applied to 3‐D geometric channels in order to investigate propagation characteristics such as convergence zones, cutoff frequencies, and transmission losses. Calculations for these types of environments must also account for 3‐D propagation effects including vertical and horizontal reflections, shallow bottoms, and sloping boundaries. Preliminary ray path results can be used to compare propagation behavior in ideal and fluid bottom linear waveguides with potential for incorporation of monitoring data and possible application to meandering river channels.
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