Correlation between Sonar Echoes and Sea Bottom Topography

2002 ◽  
pp. 319-326
Author(s):  
Jon Wegge
Keyword(s):  
Bottom Topography ◽  
Sea Bottom ◽  
Sonar Echoes

Sea Bottom Topography With X-band SLAR: Evaluation Of Existing Models

2005 ◽  
Author(s):  
J. Vogelzang ◽  
G.J. Wensink ◽  
G.P. de Loor ◽  
H.C. Peters ◽  
H. Pouwels
Keyword(s):  
Bottom Topography ◽  
Sea Bottom ◽  
X Band

COMPREHENSIVE MONITORING OF ICE GOUGING BOTTOM RELIEF AT KEY SITES OF OIL AND GAS DEVELOPMENT WITHIN THE COASTAL-SHELF ZONE OF THE RUSSIAN ARCTIC SEAS

2017 ◽  
Author(s):  
Stanislav Ogorodov ◽  
Stanislav Ogorodov ◽  
Vassily Arkhipov ◽  
Vassily Arkhipov ◽  
Alisa Baranskaya ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Bottom Topography ◽  
Modern Science ◽  
Shelf Zone ◽  
Russian Arctic ◽  
Arctic Seas ◽  
Oil And Gas Development ◽  
Sea Bottom ◽  
Coastal Shelf ◽  
Key Sites

Ice gouging is a dangerous natural process typical for the coastal-shelf zone of the Russian Arctic; because it leads to damaging of the infrastructure it can also be related to the category of catastrophic processes. To lower the risks of occurrence and to prevent emergencies and their consequences, comprehensive monitoring of the dangerous natural processes is necessary. With all lithologic and geomorphologic conditions being equal, the intensity of the ice gouging on the bottom is mostly determined by the changing condition, area and thickness of the ice cover. To assess the real intensity of the ice gouging impact during a given ice season, repeated sounding of the sea bottom topography is necessary; it helps to select the ice gouges which were created in the period between the two consequent observations. At present, the methods and technologies of the monitoring of ice gouging processes are not standardized, and the monitoring, if it is conducted, is often sporadic and lacks systematization. Therefore, the development of a united technology of comprehensive monitoring of ice gouging processes in the coastal and shelf zone is one of the most important tasks of the modern science and practice. Our team was the first one to apply such integrative technology in 2005-2015 in the framework of investigations for the purpose of construction of the underwater gas pipeline at its crossing of the Baydaratskaya Bay, Kara Sea.

COMPREHENSIVE MONITORING OF ICE GOUGING BOTTOM RELIEF AT KEY SITES OF OIL AND GAS DEVELOPMENT WITHIN THE COASTAL-SHELF ZONE OF THE RUSSIAN ARCTIC SEAS

2017 ◽  
Author(s):  
Stanislav Ogorodov ◽  
Stanislav Ogorodov ◽  
Vassily Arkhipov ◽  
Vassily Arkhipov ◽  
Alisa Baranskaya ◽  
...  
Keyword(s):  
Oil And Gas ◽  
Bottom Topography ◽  
Modern Science ◽  
Shelf Zone ◽  
Russian Arctic ◽  
Arctic Seas ◽  
Oil And Gas Development ◽  
Sea Bottom ◽  
Coastal Shelf ◽  
Key Sites

Ice gouging is a dangerous natural process typical for the coastal-shelf zone of the Russian Arctic; because it leads to damaging of the infrastructure it can also be related to the category of catastrophic processes. To lower the risks of occurrence and to prevent emergencies and their consequences, comprehensive monitoring of the dangerous natural processes is necessary. With all lithologic and geomorphologic conditions being equal, the intensity of the ice gouging on the bottom is mostly determined by the changing condition, area and thickness of the ice cover. To assess the real intensity of the ice gouging impact during a given ice season, repeated sounding of the sea bottom topography is necessary; it helps to select the ice gouges which were created in the period between the two consequent observations. At present, the methods and technologies of the monitoring of ice gouging processes are not standardized, and the monitoring, if it is conducted, is often sporadic and lacks systematization. Therefore, the development of a united technology of comprehensive monitoring of ice gouging processes in the coastal and shelf zone is one of the most important tasks of the modern science and practice. Our team was the first one to apply such integrative technology in 2005-2015 in the framework of investigations for the purpose of construction of the underwater gas pipeline at its crossing of the Baydaratskaya Bay, Kara Sea.

Mapping of sea bottom topography in a multi sensor approach

2002 ◽  
Author(s):  
J. Vogelzang ◽  
G.J. Wensink ◽  
M. van der Kooij ◽  
W. Alpers ◽  
I. Hennings ◽  
...  
Keyword(s):  
Bottom Topography ◽  
Sea Bottom

scholarly journals Characteristics of Very Low Frequency Sound Propagation in Full Waveguides of Shallow Water

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 192
Author(s):  
Nansong Li ◽  
Hanhao Zhu ◽  
Xiaohan Wang ◽  
Rui Xiao ◽  
Yangyang Xue ◽  
...  
Keyword(s):  
Shallow Water ◽  
Wave Speed ◽  
Sound Propagation ◽  
Sea Water ◽  
Bottom Topography ◽  
Low Frequency ◽  
Acoustic Energy ◽  
Propagation Characteristics ◽  
Sea Bottom ◽  
Proposed Model

This work is concerned with the characteristics of very low frequency sound propagation (VLF, ≤100 Hz) in the shallow marine environment. Under these conditions, the classical hypothesis of considering the sea bottom as a fluid environment is no longer appropriate, and the sound propagation characteristics at the sea bottom should be also considered. Hence, based on the finite element method (FEM), and setting the sea bottom as an elastic medium, a proposed model which unifies the sea water and sea bottom is established, and the propagation characteristics in full waveguides of shallow water can be synchronously discussed. Using this model, the effects of the sea bottom topography and the various geoacoustic parameters on VLF sound propagation and its corresponding mechanisms are investigated through numerical examples and acoustic theory. The simulation results demonstrate the adaptability of the proposed model to complex shallow water waveguides and the accuracy of the calculated acoustic field. For the sea bottom topography, the greater the inclination angle of an up-sloping sea bottom, the stronger the leak of acoustic energy to the sea bottom, and the more rapid the attenuation of the acoustic energy in sea water. The effect of a down-sloping sea bottom on acoustic energy is the opposite. Moreover, the greater the pressure wave (P-wave) speed in the sea bottom, the more acoustic energy remains in the water rather than leaking into the bottom; the influence laws of the density and the shear wave (S-wave) speed in the sea bottom are opposite.

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