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Characteristics of Backscattering of Harmful Algae Using Underwater Ultrasound  

Kim Eunhye (한양대학교 해양환경과학과)
Bok Tae-hoon (한양대학교 해양환경과학과)
Na Jungyul (한양대학교 해양환경과학과)
Paeng Dong-Guk (제주대학교 해양산업공학)
Publication Information
The Journal of the Acoustical Society of Korea / v.24, no.8, 2005 , pp. 447-453 More about this Journal
Abstract
Laboratory measurements were performed in a uni-algae medium Cochlodinium polykrikoides (Phytoplankton, dinoflagellates) using an Underwater Ultrasound $(5\~15\;MHz)$ to study Characteristics of Acoustic Backscattering of Harmful algae. In an effort to detect the harmful algal scatterers with population density of less than 300 cells/ml that corresponds to the precaution stage of red tide, backscattered signals from various scatterer-density samples were obtained and analyzed. Correlations between volume backscattering strength (Sv) and population density (cells/ml) of scatterers in the medium have been investigated. Comparison of Volume Backscattering Strengths calculated with the fluid-sphere model [1] and the measured values showed an agreement.
Keywords
Harmful algae; Underwater Ultrasound; Population density (cells/ml); Volume scattering strength; Fluid-sphere model;
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