Abstract
Scholte waves are valuable tool for estimating the shear properties of the ocean bottom sediments. Previously estimates of the shear wave speed were obtained using interface wave data from a small scale experiment conducted in very shallow water in coastal Rhode Island. The University of Rhode Island’s shear measurement system consisting of vertical axis and three-axis geophones were used to collect data in 3 m of water. Interface waves were excited by dropping a weight from a research vessel. In this study, we use the geophone data to estimate the depth-averaged shear attenuation using spectral amplitude ratios. The estimated sediment properties will be compared with historic core data from the field test location and other published results for similar type of sediments. The correlation of the shear speed and attenuation to sediment properties such as porosity, grain size and bulk density will be discussed. [Work supported by Office of Naval Research.]
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