Physical properties and geoacoustic provinces of surficial sediments in the southwestern part of the Ulleung Basin in the East Sea

Kim, So Ra; Lee, Gwang-Soo; Kim, Dae Choul; Bae, Sung Ho; Kim, Seong-Pil

doi:10.1016/j.quaint.2017.08.027

Cited by 15 publications

(9 citation statements)

References 37 publications

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“…The data analyzed in this study area (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22) °N and 109-119 °E) were collected from 42 stations in the SCS. We obtained 27 samples from the continental shelf, 3 samples from the continental slope, and 12 samples from the abysmal sea.…”

Section: Methodsmentioning

confidence: 99%

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Effects of physical properties on the compression wave speed of seafloor sediment in the South China Sea: Comparisons between theoretical models and measured data

Tian

Chen²,

Mo³

et al. 2023

Front. Phys.

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The compression wave speed and physical properties of seafloor sediments are significant in marine engineering and marine acoustics. Although most regression equations can be satisfactorily fitted to the data and provide a useful predictive method, there is little insight into the influence of physical properties on the compression wave speed of seafloor sediment in the South China Sea (SCS). To characterize the compression wave speed and physical properties of seafloor sediments, the compression wave speed, porosity, density, and mean grain size were measured and calculated for forty-two samples collected from the South China Sea. The results show that the RMS roughness of seafloor sediment in the South China Sea ranges from 0.2 to 15 μm, and the porosity and density are determined by the RMS roughness and mean grain size. The relationships between the compression wave speed and physical properties of seafloor sediments are consistent with the intergranular friction model. When we have the physical parameters but no compression wave speed, therefore, the intergranular friction model can be used to predict the compression wave speed of seafloor sediment. Compared with the Wood model curve, we also reveal that the intergranular friction of seafloor sediment is an important parameter in determining the compression wave speed.

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Section: Methodsmentioning

confidence: 99%

“…Moreover, these parameters are vital for the theory of wave propagation in unconsolidated seafloor sediment [9][10][11][12][13][14][15][16]. In addition, these parameters can be used to evaluate the geological events of marine sedimentary environments and control seismoacoustic propagation in the ocean [17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Effects of physical properties on the compression wave speed of seafloor sediment in the South China Sea: Comparisons between theoretical models and measured data

Tian

Chen²,

Mo³

et al. 2023

Front. Phys.

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“…Understanding these properties is essential for underwater navigation, communication, and detection using acoustic techniques [2]. These properties are influenced by sediment composition, texture, and depositional processes, making them valuable in marine sedimentary environments, marine engineering, and oceanographic studies [3,4]. Acoustic properties of sediments vary spatially, depending on sediment distribution patterns shaped by environmental conditions during formation [5,6].…”

Section: Introductionmentioning

confidence: 99%

Seafloor Sediment Acoustic Properties on the Continental Slope in the Northwestern South China Sea

Li,

Wang,

Meng

et al. 2024

JMSE

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The acoustic properties of seafloor sediments on continental slopes play a crucial role in underwater acoustic propagation, communication, and detection. To investigate the acoustic characteristics and spatial distribution patterns of sediments on the continental slope, a geoacoustic experiment was conducted in the northwestern South China Sea. The experiment covered two sections: one crossing the shelf and slope in the downslope direction, and the other near the shelf break in the along-slope direction. In situ techniques, sediment sampling, and laboratory measurements were used to acquire data on sediment acoustic properties (such as sound speed and attenuation) and physical properties (including particle composition, density, porosity, and mean grain size). The experimental findings revealed several key points: (1) Acoustic properties of shallow water coarse-grained sediments and deep-sea sediments were higher when measured in the laboratory compared to in situ measurements. (2) Relationships between measured attenuation and physical properties, as well as between sound speed and mean grain size, showed deviations from previous empirical equations. (3) Sediment acoustic and physical properties exhibited significant variations in the downslope direction, while showing gradual variations in the along-slope direction. These variations can be attributed to sedimentary environmental factors such as material sources, hydrodynamic conditions, and water depth.

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“…Restricted navigation, legal constraints, busy marine traffic, relatively low resolution of the acquired data and the surveying cost itself often make acquisition and maneuvering with streamers and seismic sources impractical or even impossible. In such settings, high-resolution single-channel seismic and acoustic surveys provide a common alternative, but the velocity data must then be obtained by other means, such as in situ measurements, laboratory core logging, and geo-acoustic modeling [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Due to costly offshore core drilling, these approaches are mostly focused on the upper few meters of the seafloor sediment.…”

Section: Introductionmentioning

confidence: 99%

Sound Velocity in a Thin Shallowly Submerged Terrestrial-Marine Quaternary Succession (Northern Adriatic Sea)

Novak

Šmuc

Poglajen³

et al. 2020

Water

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Estimating sound velocity in seabed sediment of shallow near-shore areas submerged after the Last Glacial Maximum is often difficult due to the heterogeneous sedimentary composition resulting from sea-level changes affecting the sedimentary environments. The complex sedimentary architecture and heterogeneity greatly impact lateral and horizontal velocity variations. Existing sound velocity studies are mainly focused on the surficial parts of the seabed sediments, whereas the deeper and often more heterogeneous sections are usually neglected. We present an example of a submerged alluvial plain in the northern Adriatic where we were able to investigate the entire Quaternary sedimentary succession from the seafloor down to the sediment base on the bedrock. We used an extensive dataset of vintage borehole litho-sedimentological descriptions covering the entire thickness of the Quaternary sedimentary succession. We correlated the dataset with sub-bottom sonar profiles in order to determine the average sound velocities through various sediment types. The sound velocities of clay-dominated successions average around 1530 m/s, while the values of silt-dominated successions extend between 1550 and 1590 m/s. The maximum sound velocity of approximately 1730 m/s was determined at a location containing sandy sediment, while the minimum sound velocity of approximately 1250 m/s was calculated for gas-charged sediments. We show that, in shallow areas with thin Quaternary successions, the main factor influencing average sound velocity is the predominant sediment type (i.e. grain size), whereas the overburden influence is negligible. Where present in the sedimentary column, gas substantially reduces sound velocity. Our work provides a reference for sound velocities in submerged, thin (less than 20 m thick), terrestrial-marine Quaternary successions located in shallow (a few tens of meters deep) near-shore settings, which represent a large part of the present-day coastal environments.

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Physical properties and geoacoustic provinces of surficial sediments in the southwestern part of the Ulleung Basin in the East Sea

Cited by 15 publications

References 37 publications

Effects of physical properties on the compression wave speed of seafloor sediment in the South China Sea: Comparisons between theoretical models and measured data

Effects of physical properties on the compression wave speed of seafloor sediment in the South China Sea: Comparisons between theoretical models and measured data

Seafloor Sediment Acoustic Properties on the Continental Slope in the Northwestern South China Sea

Sound Velocity in a Thin Shallowly Submerged Terrestrial-Marine Quaternary Succession (Northern Adriatic Sea)

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