scholarly journals Shallow water sediment layer structure and composition effects on range‐dependent transmission loss at the AGS site

1994 ◽  
Vol 95 (5) ◽  
pp. 2928-2929
Author(s):  
K. P. Bongiovanni ◽  
Mohsen Badiey ◽  
W. L. Siegmann
Keyword(s):  
Shallow Water ◽  
Transmission Loss ◽  
Layer Structure ◽  
Sediment Layer ◽  
Composition Effects ◽  
Shallow Water Sediment

The Effect of Sea Bottom Acoustic Parameters on Acoustic Wave Transmission in Shallow Water

2012 ◽  
Vol 588-589 ◽  
pp. 790-793
Author(s):  
Jing Han ◽  
Hao Hao Hu ◽  
Chun Xia Meng ◽  
Xue Gang Zhang
Keyword(s):  
Acoustic Wave ◽  
Shallow Water ◽  
Transmission Loss ◽  
Wave Transmission ◽  
Sediment Layer ◽  
Acoustic Parameters ◽  
Sea Bottom ◽  
Basement Layer

The acoustic parameters of the sea bottom were an important factor which affected the acoustic wave transmission in shallow water. This work devoted to study the effect of sea bottom parameters on acoustic wave transmission. The sea bottom was divided into two layers. The acoustic wave transmission loss(tl) under different sea bottom parameters was computed using KRAKENC program in the frequency of 500Hz. The simulated results showed that the acoustic parameters of sediment layer had important effect on acoustic wave transmission and the acoustic parameters of basement layer had almost no effect on acoustic wave transmission.

TWO MODELING APPROACHES FOR REVERBERATION IN A SHALLOW WATER WAVEGUIDE WHERE THE SCATTERING ARISES FROM A SUB-BOTTOM INTERFACE

2009 ◽  
Vol 17 (01) ◽  
pp. 29-43 ◽  
Author(s):  
CHARLES W. HOLLAND ◽  
DALE D. ELLIS
Keyword(s):  
Shallow Water ◽  
Silty Clay ◽  
Sediment Layer ◽  
Angle Distribution ◽  
Vertical Angle ◽  
Fine Grained ◽  
Bottom Interface ◽  
Grazing Angles ◽  
Scattering Kernel ◽  
Sediment Interface

In shallow water environments where the uppermost sediment layer is a fine-grained fabric (e.g. clay or silty-clay), the observed reverberation may be dominated by scattering from the sub-bottom. Here, reverberation predictions from normal mode and energy flux models are compared for the case where the scattering arises from a sub-bottom half-space under a fine-grained sediment layer. It is shown that in such an environment, the position of the angle of intromission, in addition to the angular dependence of the scattering kernel, is a factor controlling the reverberation and its vertical angle distribution. It is also shown that the reverberation from a sub-bottom horizon is typically governed by higher grazing angles than the case where the scattering occurs at the water–sediment interface. There was generally very close agreement between the models as a function of frequency (200–1600 Hz), layer thickness (0–8 m), and range (1–15 km). The model comparisons, showing some differences, illuminate the result of different approximations in the two approaches.

Shallow water sediment properties derived from high-frequency shear and interface waves

1992 ◽  
Vol 97 (B4) ◽  
pp. 4739 ◽  
Author(s):  
John Ewing ◽  
Jerry A. Carter ◽  
George H. Sutton ◽  
Noel Barstow
Keyword(s):  
Shallow Water ◽  
High Frequency ◽  
Sediment Properties ◽  
Interface Waves ◽  
Shallow Water Sediment

Ensuring very shallow-water sediment properties: case study from Capo Granitola harbour, Sicily (Italy)

2017 ◽  
Vol 38 (3) ◽  
pp. 313-323
Author(s):  
Michele Punzo ◽  
Giuseppe Cavuoto ◽  
Daniela Tarallo ◽  
Vincenzo Di Fiore
Keyword(s):  
Shallow Water ◽  
Sediment Properties ◽  
Shallow Water Sediment
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