Turbid bottom water layer and bottom sediment in the Seto Inland Sea

  • Kichiichiro Kawana
  • Terumi Tanimoto


Measurement of the vertical distribution of total suspended matter (TSM) was carried out during summer throughout the Seto Inland Sea. TSM concentration near the bottom is influenced significantly by water movement and turbid bottom water is observed in all areas where median grain size (Mdφ) of the bottom sediment is more than 47gf. The high concentration of TSM near the bottom may be due to resuspension of the surface layer of bottom sediments. Comparison of the organic content of the resuspended matter with that of the bottom sediment shows that the resuspended matter contains more organic matter with a lower C : N ratio than the bottom sediment. The C : N ratio of the resuspended matter is similar to that of TSM in the surface layer of the water column. It is thought that TSM in surface waters sinks and settles on the surface of the bottom sediment. This deposited material is then easily resuspended in the water column by tidal currents before becoming permanently incorporated into the bottom sediment.


Grain Size Organic Matter Surface Water Surface Layer Water Column 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© the Oceanographical Society of Japan 1984

Authors and Affiliations

  • Kichiichiro Kawana
    • 1
  • Terumi Tanimoto
    • 1
  1. 1.Government Industrial Research InstituteKure, HiroshimaJapan

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