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ZHANG Yanxin, GUO Changsheng, WANG Jingqiang, HOU Zhengyu, CHEN Wenjing. Relationship between in situ sound velocity and granular characteristics of seafloor sediments in the Qingdao offshore region[J]. Journal of Oceanology and Limnology, 2017, 35(3): 704-711 |
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Relationship between in situ sound velocity and granular characteristics of seafloor sediments in the Qingdao offshore region |
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| ZHANG Yanxin1,2, GUO Changsheng1, WANG Jingqiang3, HOU Zhengyu1,2, CHEN Wenjing1,2 |
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1 Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 University of Chinese Academy of Sciences, Beijing 100049, China;
3 Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration (SOA), Qingdao 266061, China |
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| Abstract: |
| The sound velocity of seafloor sediments from shallow seas can provide important information for harbor design, and ocean and seacoast engineering projects. In this study, in situ measurements were used to obtain accurate sediment sound velocities at 45 stations offshore of Qingdao. The relationships between the sound velocity and granular properties of the seafloor sediments were analyzed. Sound velocity showed an increase with the sand content, sand-clay ratio, and sorting coefficient; and a nonlinear decreasing trend with increasing mean grain size and clay content. We plotted a sound velocity distribution map, which shows that the sound velocity was closely related to the geological environment. Previous empirical equations suggested by Hamilton, Anderson, and Liu were used to calculate the velocity with grain size. A comparison between the measured and calculated velocities indicates that the empirical equations have territorial limitations, and extensive data are essential to establish global empirical equations. Future work includes the calibration of the laboratory acoustic measurements with an in situ technique. |
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| Key words:
sound velocity|granular properties|empirical equation
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| Received: 2016-01-03 Revised: 2016-03-19 |
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References:
Anderson R S. 1974. Statistical correlation of physical properties and sound velocity in sediments. In: Hampton L ed. Physics of Sound in Marine Sediments. Springer, New York. p.481-518.
Bachman R T. 1985. Acoustic and physical property relationships in marine sediment. The Journal of the Acoustical Society of America, 78(2): 616-621.
Bachman R T. 1989. Estimating velocity ratio in marine sediment. The Journal of the Acoustical Society of America, 86(5): 2 029-2 032.
Buckingham M J, Richardson M D. 2002. On tone-burst measurements of sound speed and attenuation in sandy marine sediments. IEEE Journal of Oceanic Engineering, 27(3): 429-453.
Compilation Committee of “Records of Bays in China”. 1993. Records of Bays in China 4: Bays in South Shandong Peninsula and Jiangsu. China Ocean Press, Beijing, China. (in Chinese)
Dong H P, Li S Q, Li G X, Li C, Chen Z X, Zhao T H. 2006. On the offshore tidal depositional system in Qingdao. Periodical of Ocean University of China, 36(1): 31-36. (in Chinese with English abstract)
Gorgas T J, Wilkens R H, Fu S S, Frazer L N, Richardson M D, Briggs K B, Lee H. 2002. In situ acoustic and laboratory ultrasonic sound speed and attenuation measured in heterogeneous soft seabed sediments: Eel River shelf, California. Marine Geology, 182(1-2): 103-119.
Hamilton E L. 1970. Sound velocity and related properties of marine sediments, North Pacific. Journal of Geophysical Research, 75(23): 4 423-4 446.
Hamilton E L. 1974. Geoacoustic models of the sea floor. In: Hampton L ed. Physics of Sound in Marine Sediments. Springer, New York. p.181-221.
Hamilton E L. 1976. Variations of density and porosity with depth in deep-sea sediments. Journal of Sedimentary Research, 46(2): 280-300.
Hamilton E L. 1980. Geoacoustic modeling of the sea floor. The Journal of the Acoustical Society of America, 68(5): 1 313-1 340.
Hamilton E L, Bachman R T. 1982. Sound velocity and related properties of marine sediments. The Journal of the Acoustical Society of America, 72(6): 1 891-1 904.
Hou Z Y, Guo C S, Wang J Q, Li H Y, Li T G. 2014. Tests of new in-situ seabed acoustic measurement system in Qingdao. Chinese Journal of Oceanology and Limnology, 32(5): 1 172-1 178.
Kim D C, Kim G Y, Yi H I, Seo Y K, Lee G S, Jung J H, Kim J C. 2012. Geoacoustic provinces of the South Sea shelf off Korea. Quaternary International, 263: 139-147.
Kim G Y, Kim D C. 2001. Comparison and correlation of physical properties from the plain and slope sediments in the Ulleung Basin, East Sea (Sea of Japan). Journal of Asian Earth Sciences, 19(5): 669-681.
Li F Y, Song J M, Li X G, Wang Y P, Qi J. 2003. Modern sedimentation rate and flux in the Jiaozhou Bay. Marine Geology & Quaternary Geology, 23(4): 29-33. (in Chinese with English abstract)
Li S W. 1983. The formation and evolution of Jiaozhou Bay, based upon sediment characteristics. Acta Oceanologica Sinica, 5(3): 328-339. (in Chinese with English abstract)
Liu B H, Han T C, Kan G M, Li G B. 2013. Correlations between the in situ acoustic properties and geotechnical parameters of sediments in the Yellow Sea, China. Journal of Asian Earth Sciences, 77: 83-90.
Lu B, Liu Q. 2008. Grain and pore factors in acoustic response of seafloor sediments. Journal of Tropical Oceanography, 27(3): 23-29. (in Chinese with English abstract)
Lu T S, Bryant W R, Slowey N C. 1998. Regression analysis of physical and geotechnical properties of surface marine sediments. Marine Georesources & Geotechnology, 16(3): 201-220.
Orsi T H, Dunn D A. 1991. Correlations between sound velocity and related properties of glacio-marine sediments: Barents sea. Geo-Marine Letters, 11(2): 79-83.
Richardson M D, Briggs K B, Bentley S J, Walter D J, Orsi T H. 2002. The effects of biological and hydrodynamic processes on physical and acoustic properties of sediments off the Eel River, California. Marine Geology, 182(1-2): 121-139.
Wang J Q, Guo C S, Li H Y. 2013. The experimental study of in situ acoustic measurement system in Jiaozhou Bay. Periodical of Ocean University of China, 43(3): 75-80. (in Chinese with English abstract)
Wang Y P, Gao S, Jia J J. 2000. Sediment distribution and transport patterns in Jiaozhou Bay and adjoining areas. Acta Geographica Sinica, 55(4): 449-458. (in Chinese with English abstract)
Zhang G L, Zhang J, Xu J, Zhang F. 2006. Distributions, sources and atmospheric fluxes of nitrous oxide in Jiaozhou Bay. Estuarine, Coastal and Shelf Science, 68(3-4): 557-566.
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