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http://dx.doi.org/10.5467/JKESS.2019.40.4.428

Geoacoustic Model of Coastal Bottom Strata off the Northwestern Taean Peninsula in the Yellow Sea  

Ryang, Woo-Hun (Division of Science Education and Institute of Science Education, Chonbuk National University)
Kwon, Hyuckjong (Department of Marine Science and Convergence Engineering, Hanyang University-ERICA)
Choi, Jee-Woong (Department of Marine Science and Convergence Engineering, Hanyang University-ERICA)
Kim, Kyong-O (Korea Institute of Geoscience and Mineral Resources (KIGAM))
Hahn, Jooyoung (Agency for Defense Development)
Publication Information
Journal of the Korean earth science society / v.40, no.4, 2019 , pp. 428-435 More about this Journal
Abstract
In the shallow coastal area, located off the northwestern Taean Peninsula of the eastern Yellow Sea, geoacoustic models with two layers were reconstructed for underwater acoustic experimentation and modeling. The Yellow Sea experienced glacio-eustasy sea-level fluctuations during Quaternary period. Coastal sedimentation in the Yellow Sea was characterized by alternating terrestrial and shallow marine deposits that reflected the fluctuating sea levels. The coastal geoacoustic models were based on data from piston, grab cores and the high-resolution 3.5 kHz, chirp seismic profiles (about 70 line-kilometers, respectively). Geoacoustic data of the cores were extrapolated down to 3 m in depth for geoacoustic models. The geoacoustic property of seafloor sediments is considered a key parameter for modeling underwater acoustic environments. For simulating actual underwater environments, the P-wave speed of the models was adjusted to in-situ depth below the sea floor using the Hamilton method. The proposed geoacoustic models could be used for submarine acoustic inversion and modeling in shallow-water environments of the study area.
Keywords
geoacoustic model; geoacoustic property; coastal geoacoustic; Yellow Sea;
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