Mapping of ocean currents in shallow water using moving ship acoustic tomography

2019 ◽  
Vol 145 (2) ◽  
pp. 858-868 ◽  
Author(s):  
Chen-Fen Huang ◽  
Yun-Wen Li ◽  
Naokazu Taniguchi
Keyword(s):  
Shallow Water ◽  
Ocean Currents ◽  
Acoustic Tomography

MAPPING TIDAL CURRENTS AND RESIDUAL CURRENTS BY USE OF COASTAL ACOUSTIC TOMOGRAPHY

2017 ◽  
Author(s):  
Xiao-Hua Zhu ◽  
Xiao-Hua Zhu ◽  
Ze-Nan Zhu ◽  
Ze-Nan Zhu ◽  
Xinyu Guo ◽  
...  
Keyword(s):  
Shallow Water ◽  
Shallow Water Equations ◽  
Mean Amplitude ◽  
Momentum Equation ◽  
Tidal Currents ◽  
Acoustic Tomography ◽  
Mean Values ◽  
Residual Currents ◽  
Water Depths ◽  
Deep Area

A coastal acoustic tomography (CAT) experiment for mapping the tidal currents in the Zhitouyang Bay was successfully carried out with seven acoustic stations during July 12 to 13, 2009. The horizontal distributions of tidal current in the tomography domain are calculated by the inverse analysis in which the travel time differences for sound traveling reciprocally are used as data. Spatial mean amplitude ratios M2 : M4 : M6 are 1.00 : 0.15 : 0.11. The shallow-water equations are used to analyze the generation mechanisms of M4 and M6. In the deep area, velocity amplitudes of M4 measured by CAT agree well with those of M4 predicted by the advection terms in the shallow water equations, indicating that M4 in the deep area where water depths are larger than 60 m is predominantly generated by the advection terms. M6 measured by CAT and M6 predicted by the nonlinear quadratic bottom friction terms agree well in the area where water depths are less than 20 m, indicating that friction mechanisms are predominant for generating M6 in the shallow area. Dynamic analysis of the residual currents using the tidally averaged momentum equation shows that spatial mean values of the horizontal pressure gradient due to residual sea level and of the advection of residual currents together contribute about 75% of the spatial mean values of the advection by the tidal currents, indicating that residual currents in this bay are induced mainly by the nonlinear effects of tidal currents.

Using acoustic tomography to monitor deep ocean currents in the eastern Gulf of Mexico

OCEANS 2009 ◽  
2009 ◽  
Author(s):  
D. A. Rosenfield ◽  
J. W. Caruthers ◽  
D. A. Nechaev ◽  
G. E. Ioup ◽  
J. W. Ioup ◽  
...  
Keyword(s):  
Gulf Of Mexico ◽  
Deep Ocean ◽  
Ocean Currents ◽  
Acoustic Tomography ◽  
Eastern Gulf Of Mexico ◽  
Deep Ocean Currents

Application of shallow-water acoustic tomography to measure flow direction and river discharge

2016 ◽  
Vol 51 ◽  
pp. 30-39 ◽  
Author(s):  
Masoud Bahreinimotlagh ◽  
Kiyosi Kawanisi ◽  
Mochammad Meddy Danial ◽  
Mohamad Basel Al Sawaf ◽  
Junya Kagami
Keyword(s):  
Shallow Water ◽  
River Discharge ◽  
Flow Direction ◽  
Acoustic Tomography

scholarly journals Shallow-water acoustic tomography from angle measurements instead of travel-time measurements

2013 ◽  
Vol 134 (4) ◽  
pp. EL373-EL379 ◽  
Author(s):  
Florian Aulanier ◽  
Barbara Nicolas ◽  
Jérôme I. Mars ◽  
Philippe Roux ◽  
Romain Brossier
Keyword(s):  
Shallow Water ◽  
Travel Time ◽  
Acoustic Tomography ◽  
Angle Measurements

scholarly journals Assessing the feasibility of applying Reverse Osmosis technology at MN Port

2019 ◽  
Vol 107 ◽  
pp. 01002
Author(s):  
Syaifulloh Hananta ◽  
Santoso
Keyword(s):  
Shallow Water ◽  
Reverse Osmosis ◽  
Water Intake ◽  
Ocean Currents ◽  
Development Plan ◽  
Diurnal Tide ◽  
Port Development ◽  
The North ◽  
Depth Ranges ◽  
Dominant Direction

This paper aims to assess the feasibility of applying Reverse Osmosis (RO) technology at MN Port. Hydro-oceanography analysis was performed to understand sea conditions in the proximity of MN Port and to determine water intake point. Furthermore, design analysis was also conducted to determine the most suitable RO design to be applied. Based on the hydro-oceanography analysis, the study area is generally shallow water areas with the depth ranges from 2-10 meters, and the type of tide is diurnal tide. The speed and direction of ocean currents range from 0.01-0.06 m/s with the dominant direction trending northeast and north. Based on the port development plan and hydro-oceanography analysis, it is recommended that the water intake point is at the north of the port. The results obtained from several analyses show that RO technology can be applied at MN Port.

Application of full waveform inversion technique to shallow water acoustic tomography

2013 ◽  
Author(s):  
Yukihiro Kida ◽  
Hitoshi Mikada ◽  
Tada-nori Goto ◽  
Junichi Takekawa ◽  
Eiichi Asakawa ◽  
...  
Keyword(s):  
Shallow Water ◽  
Waveform Inversion ◽  
Acoustic Tomography ◽  
Full Waveform Inversion ◽  
Inversion Technique ◽  
Full Waveform

Shallow-Water Acoustic Tomography Performed From a Double-Beamforming Algorithm: Simulation Results

2009 ◽  
Vol 34 (2) ◽  
pp. 140-149 ◽  
Author(s):  
I. Iturbe ◽  
P. Roux ◽  
B. Nicolas ◽  
J. Virieux ◽  
J.I. Mars
Keyword(s):  
Shallow Water ◽  
Acoustic Tomography ◽  
Simulation Results ◽  
Beamforming Algorithm
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