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Correlation of Simrad EM950(95kHz) Multibeam Backscatter Strength with Surficial Sediment Properties in the Sand Ridge of the Eastern Yellow Sea  

Kong, Gee-Soo (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources)
Kim, Seong-Pil (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources)
Park, Yo-Seop (UST21)
Min, Gun-Hong (Petroleum & Marine Resources Research division, Korea Institute of Geoscience and Mineral Resources)
Kim, Ji-Uk (Korea Water Resources Corporation (KWATER))
Park, Soo-Chul (Department of Oceanography Chungnam National University)
Publication Information
Economic and Environmental Geology / v.39, no.6, 2006 , pp. 719-738 More about this Journal
Abstract
Simrad EM950 multibeam data and surficial sediment grab samples were acquired to correlate backscatter strength with surficial sediment properties in the eastern Yellow Sea which tidal sand ridges are dominantly developed. The study area is divided into the western sand ridge zone characterized by well sorted, fine sandy sediment, and the eastern non-sand ridge zone characterized by poorly sorted, medium sand with some gravels and shell fragments. In spite of minor difference in grain size between two zones, the variations of backscatter strength between two zones are distinct. Multibeam backscatter strength of study area shows good correlation with the grain size of surface sediment as well as the carbonate contents. High occurrence of carbonate shell fragments can increase grain size and bottom roughness. The dominance of higher backscatter strength in the eastern non-sand ridge zone may reflect the effects of coarse grain size and high shell fragments contents.
Keywords
multibeam; backscatter strength; surface sediment; grain size;
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