Investigation of the relationship between seafloor echo strength and sediment type—a case study in Jiaozgou Bay,China |
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Authors: | Dewen Du Yongqi Chen |
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Institution: | (1) Department of Land Surveying and Geo-Informatics, The Hong Kong Polytechnic University, Hong Kong, China |
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Abstract: | In recent years, increasing attention is being given to investigating the relationships between seafloor echo strength and
sediment type. This aspect was assessed in a course of a marine survey conducted in Jiaozhou Bay near the city of Qingdao,
China, where various sediment types are known to exist. Multi-beam echo data and sediment samples were acquired, processed
and analyzed. The findings demonstrate that multi-beam echo strengths are strongly related to seabed types such as rock, sand
and clay. Thus, echo strength increases progressively with the increase in sand content in gravely, sandy, and clayey sediments.
However, echo strength is more sensitive to changes in sand content in fine-grained sediment and less sensitive in coarse-grained
sediment. Also, high shell content of sediments greatly enhances the acoustic reflection. These findings help to predict seafloor
sediment types by analyzing echo strength. |
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Keywords: | |
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