Measurement of the thickness of the sand layer spread over the soft mud layer at the bottom of harbors, etc. is important in such operations as capping contaminated bottom sediments and harbor construction where such a soft mud layer is present.
This paper describes the model experiments on measurement of sand attenuation constant and ultrasonic reflection from the boundary between the sand layer and the soft mud layer and the field tests where such the soft mud layer is covered with the sand layer, using the mono-pulse sound waves.
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