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http://dx.doi.org/10.5467/JKESS.2016.37.4.200

Geoacoustic Model of Coastal Bottom Strata at Jeongdongjin in the Korean Continental Margin of the East Sea  

Ryang, Woo-Hun (Division of Science Education and Institute of Science Education, Chonbuk National University)
Kim, Seong-Pil (Pohang Branch, Korea Institute of Geoscience and Mining Resources (KIGAM))
Kim, Dae-Choul (Department of Energy Resources Engineering, Pukyong National University)
Hahn, Jooyoung (Agency for Defense Development)
Publication Information
Journal of the Korean earth science society / v.37, no.4, 2016 , pp. 200-210 More about this Journal
Abstract
Geoacoustic modeling is used to predict sound transmission through submarine bottom layers of sedimentary strata and acoustic basement. This study reconstructed four geoacoustic models for sediments of 50 m thick at the Jeongdongjin area in the western continental margin of the East Sea. Bottom models were based on the data of the highresolution air-gun seismic and subbottom profiles (SBP) with sediment cores. P-wave speed was measured by the pulse transmission technique, and the resonance frequency of piezoelectric transducers was maintained at 1MHz. Measurements of 42 P-wave speeds and 41 attenuations were fulfilled in three core sediments. For actual modeling, the P-wave speeds of the models were compensated to in situ depth below the sea floor using the Hamilton method. These geoacoustic models of coastal bottom strata will be used for geoacoustic and underwater acoustic experiments reflecting vertical and lateral variability of geoacoustic properties in the Jeongdongjin area of the East Sea.
Keywords
geoacosutic model; bottom model; P-wave speed; Jeongdongjin; East Sea;
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