MEDIUM AND LONG-TERM EFFECTS FOR SEDIMENT IMPROVEMENT THROUGH COVERING ON SEABED WITH GRANULATED COAL ASH

DOI 3 Citations 2 References

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Other Title
  • 石炭灰造粒物の海底被覆による中・長期的な海域環境改善効果

Abstract

 In order to verify the effectiveness of new sediment improvement technique that covering on seabed with granulated coal ash, we have monitored over the two and a half years since the experiment began at the Kaita Bay. Two and a half years later, the suspended mud thickness above the covering layer was about 2cm. This thickness is almost half that of the sedimentation rate at the Kaita bay. It indicated that suspended mud redeposit to covering layer was containment because of the function that suspended mud trapped by void structure on covering layer. Another function of this technique that means removal ability of hydrogen sulfide and nutrients or tempered hypoxia had been continued. Consequently, the benthos biomass was increased after experiment, and species composition succession from r-selection species to kselection species. We concluded that this new technique induce positive spiral for coastal environment through the physical and chemical function has been continued over 3 years and recovery the benthic ecosystem.

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Details 詳細情報について

  • CRID
    1390282680329574912
  • NII Article ID
    130004961841
  • DOI
    10.2208/jscejoe.69.i_892
  • ISSN
    21854688
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
    • KAKEN
  • Abstract License Flag
    Disallowed

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