Seafloor Scattering in Shallow-Water Environments
PENNSYLVANIA STATE UNIV STATE COLLEGE APPLIED RESEARCH LAB
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Mud volcanoes are solid objects that form on the seafloor due to the emission of gas and fluidized sediment from the earth s interior 1. They vary widely in size, can be exposed, proud, or buried, and are of interest to the Navy as sources of active sonar clutter 2. The long-term goal of this work is to accurately model mud volcano scattering. The final product will make predicting and simulating scattering signatures for individual volcanoes possible, and will provide the information necessary to mitigate mud volcano clutter through improved sonar design and classification schemes. The long-term goals of the seafloor scattering project are linked to both the forward and inverse scattering problems. The first objective is to model the time dependence of seafloor scattering based upon knowledge of the mechanisms responsible for benthic change, primarily bioturbation and sediment transport. The second is to develop acoustics as a tool for the remote sensing of benthic activity and the inversion of time-dependent seabed parameters that are used as inputs for reverberation models. Results should be of use to the Navy in understanding and predicting the time dependence of reverberation, as well as measuring the parameters necessary for reverberation models.
- Physical and Dynamic Oceanography