MEASUREMENT OF FLOATING SAND PARTICLE CONCENTRATION AND ESTIMATE OF THE FLUX IN SEA SAND MINING AREA

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  • HASHIMOTO Eisuke
    社団法人 土木学会 (独) 産業技術総合研究所 海洋資源環境研究部門
  • NAGAO Masayuki
    社団法人 土木学会 (独) 産業技術総合研究所 海洋資源環境研究部門
  • TAKASUGI Yoshio
    社団法人 土木学会 (独) 産業技術総合研究所 海洋資源環境研究部門

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Other Title
  • 海砂採取海域での浮遊砂濃度計測と輸送量算出
  • ウミズナサイシュ カイイキ デ ノ フユウ サ ノウド ケイソク ト ユソウリョウ サンシュツ

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Description

In order to clarify the transportation of floating sand in a sea sand mining area of the Seto Inland Sea, the sectional measurements of current and suspended sediment (SS) were conducted with an Acoustic Doppler Current Profiler (ADCP) in the Mihara Seto Strait. The relationship between the backscatter strength (Sv) of ADCP and the concentration of SS had a high correlation. Then, Sv could be converted into the concentration of SS, and the flux of the SS was estimated. In each section, the total flux of the SS was calculated assuming that the tidal current was sinusoidal wave. As a result, the net of the flux of the SS showed the inflow in the Mihara Seto Strait.

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