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Development of sampling system for consolidated mud and understanding on settling mechanism of floating mud using the sampling system

Research Project

Project/Area Number 14350269
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionHIROSHIMA UNIVERSITY

Principal Investigator

HIBINO Tadashi  Hiroshima University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50263736)

Co-Investigator(Kenkyū-buntansha) KOMAI Katsuaki  Hiroshima University, Graduate School of Engineering, Research Associate, 大学院・工学研究科, 助手 (90314731)
OZAKI Noriatsu  Hiroshima University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (50294541)
高橋 暁  産業技術総合研究所, 海洋資源環境研究部門, 主任研究員 (30357371)
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥12,100,000 (Direct Cost: ¥12,100,000)
Fiscal Year 2005: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2004: ¥2,700,000 (Direct Cost: ¥2,700,000)
Fiscal Year 2003: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2002: ¥4,400,000 (Direct Cost: ¥4,400,000)
Keywordspore water movement / high turbidity layer generation / upwelling of floating mud / DO Respiration / ground water level / stratification / weight of sea water / 高濁質層の形式 / 底泥の巻き上げ / 海底浮遊泥 / 堆積密度 / 間隙水流動 / 採泥器 / 栄養塩 / 巻き上がり / 閉鎖性海域
Research Abstract

By investigating the sediment at the sea bottom of the Hiroshima Bay, we were able to show the seasonal change mechanism of the sediment with the pore water movement.
The turbidity increasing does not only depend on the velocity above the bottom but also on the movement of pore water in the consolidated sediment. According to the experiment, the fluid mud doesn't well up when the velocity of under 6cm/s is occurred above the bed. In these results, the bottom flow, observed at the head of Hiroshima Bay, cannot cause the upwelling of the bottom sediment.
Wet density, water content and specific gravity in surface sediment seasonally changed in over 20 cm depths. Water content increased more from summer to fall, and was over 500% at the fluid mud layer in fall. The high turbidity is generated in water content increasing period.
The generation process of the high turbidity is hypothesized that firstly, the pressure different between sea and ground generates in the stratified season because of the water heating etc., secondly, the pore water moves cyclically with tide, finally, the fluid mud wells up with the pore water flowing up from the sediment.
In the consolidated sediment, DO above the sediment are consumed resulting to oxygen-deficient water mass occurs at the sea bottom. According to the numerical simulation, the estimated amounts of the pore water moving explain the turbidity variation and water content profiles of the sediment. These phenomena can be explained by the pore water movement between the sea above the bottom and the sediment layer.

Report

(5 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (39 results)

All 2005 2004 2003 Other

All Journal Article (35 results) Publications (4 results)

  • [Journal Article] 太田川河口における有機泥の挙動に関する研究2005

    • Author(s)
      富田 智
    • Journal Title

      水工学論文集 49巻(2)

      Pages: 1411-1416

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Comparison of different methods for measuring dry deposition fluxes of particulate matter and polycyclic aromatic hydrocarbons (PAHs) in the ambient air2005

    • Author(s)
      A.S.Shannigrahi
    • Journal Title

      Atmospheric environment 39

      Pages: 653-662

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 石炭灰造粒物を用いた底質改善技術の検討2005

    • Author(s)
      富田 智
    • Journal Title

      海洋開発論文集 21

      Pages: 743-748

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 広島湾奥域における有機懸濁物質の沈降特性2005

    • Author(s)
      佐々倉諭
    • Journal Title

      海岸工学論文集 52(2)

      Pages: 911-915

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 広島湾における有機物の変動解析と栄養塩生成形態の把握2005

    • Author(s)
      永尾謙太郎
    • Journal Title

      海岸工学論文集 52(2)

      Pages: 916-920

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] 底泥内での間隙水の動きと浮遊層の形成機構2005

    • Author(s)
      日比野忠史
    • Journal Title

      海岸工学論文集 52(2)

      Pages: 961-965

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Pore Water Movement in the Consolidated Sediment at the Sea Bottom2005

    • Author(s)
      Tadashi Hibino
    • Journal Title

      Proceedings of the Third International Conference on Asian and Pacific Coasts

      Pages: 920-930

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Study on the Transportation of Organic Mud in the Ohtagawa Estuary2005

    • Author(s)
      Hiroki Nagato
    • Journal Title

      Proceedings of the Third International Conference on Asian and Pacific Coasts

      Pages: 956-966

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Annual Research Report 2005 Final Research Report Summary
  • [Journal Article] Study on the Transportation of Organic Mud in Ohtagawa Estuary2005

    • Author(s)
      Satishi Tomida
    • Journal Title

      Annual Journal of Hydraulic Engineering, JSCE Vol.49 (2)

      Pages: 1411-1416

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Study of Environmental Quality Improvement Technology Using Fly Ash For Consolidated Sediment2005

    • Author(s)
      Satishi Tomida
    • Journal Title

      Annual Journal of Civil Engineering in the Ocean, JSCE Vol.21

      Pages: 743-748

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Setting Process of Suspended Particulate Matter in Hiroshima Bay2005

    • Author(s)
      Satoshi Sasakura
    • Journal Title

      Annual Journal of Coastal Engineering, JSCE Vol.52 (2)

      Pages: 911-915

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Decomposition of Organic Matter and Nutrient Dynamic in Hiroshima Bay2005

    • Author(s)
      Kentaro Nagao
    • Journal Title

      Annual Journal of Coastal Engineering, JSCE Vol.52(2)

      Pages: 916-920

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Pore Water Movement in Consolidate Sediment and Mechanism of Floating-Mud-Layer Formation2005

    • Author(s)
      Tadashi Hibino
    • Journal Title

      Annual Journal of Coastal Engineering, JSCE Vol.52(2)

      Pages: 961-965

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Comparison of different methods for measuring dry deposition fluxes of particulate matter and polycyclic aromatic hydrocarbons (PAHs) in the ambient air, Shannigrahi2005

    • Author(s)
      A.S.Shannigrahi
    • Journal Title

      Atmospheric environment 39

      Pages: 653-662

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 底泥内での間隙水の動きと浮泥層の形成機構2005

    • Author(s)
      日比野忠史
    • Journal Title

      海岸工学論文集 52(2)

      Pages: 961-965

    • NAID

      130003991816

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 巻き上げに伴う再浮遊泥による栄養塩変動課程のモデル化に関する研究2004

    • Author(s)
      永尾謙太郎
    • Journal Title

      海洋開発論文集 20

      Pages: 605-609

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 河口域での有機物の循環と生物棲息場の形成2004

    • Author(s)
      日比野忠史
    • Journal Title

      「第1回中国現地ワークショップin広島」水系環境の保全と創造-自然再生に向けて-講演集

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 間隙水の流動に伴う底質の性状変化2004

    • Author(s)
      多田一史
    • Journal Title

      海岸工学論文集 51(2)

      Pages: 991-995

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Characteristics of partition of chemicals between solid and liquid in sediments2004

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Proceedings of International Conference on Civil and Environmental Engineering ICCEE-2004

      Pages: 169-177

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Dispersion and dry and wet deposition of PAHs in an atmospheric environment2004

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Proceedings of 8th International conference on Diffuse/Nonpoint Pollution

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Research on Modeling of the Nutrient Dynamics with Resuspension Sediments2004

    • Author(s)
      Kentaro Nagao
    • Journal Title

      Annual Journal of Civil Engineering in the Ocean, JSCE Vol.21

      Pages: 605-609

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Circuration of Organic matter and generation of habitat in estuary2004

    • Author(s)
      Tadashi Hibino
    • Journal Title

      First Chugoku regional workshop in Hiroshima, water-Environmental Conservation and Mitigation-Toward Nature Restoration, pp.2-2-1 2-2-12,Ecology and Civil Engineering Society

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The Sediment Variations under the Flow of Pore Water2004

    • Author(s)
      Kazufumi Tada
    • Journal Title

      Annual Journal of Coastal Engineering, JSCE Vol.,51(2)

      Pages: 991-995

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 巻き上げに伴う再浮遊泥による栄養素塩変動過程のモデル化にする研究2004

    • Author(s)
      永尾謙太郎
    • Journal Title

      海洋開発論文集 20

      Pages: 605-609

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 間隙水の流動に伴う底質の性状変化2004

    • Author(s)
      田多一史
    • Journal Title

      海岸工学論文集 51(2)

      Pages: 991-995

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 河口域での有機物の循環と生物棲息場の形成2004

    • Author(s)
      日比野忠史
    • Journal Title

      「第1回中国現地ワークショップin広島」水系環境の保全と創造-自然再生に向けて-講演集.応用生態工学会

    • Related Report
      2004 Annual Research Report
  • [Journal Article] The Characteristic of Fluid Mud and Coastal Water Quality in the Hiroshima Bay2003

    • Author(s)
      Kazufumi Tada
    • Journal Title

      Asian and Pacific Coasts 2003

      Pages: 218-219

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 干潟浄化能力の定量的評価手法の提案2003

    • Author(s)
      日比野忠史
    • Journal Title

      海岸工学論文集 50(2)

      Pages: 1071-1075

    • NAID

      130003991273

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Emission and dispersion of PAHs from heavy traffic road2003

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Air Pollution XI

      Pages: 623-632

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A study on sludge accumulation mechanism on flat sheet membrane surface in submerged membrane bioreactor2003

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Proceedings of International Conference on Civil and Environmental Engineering ICCEE-2003

      Pages: 177-186

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] 光分解・生物分解による水中溶存有機物の変質とそのEEMへの影響2003

    • Author(s)
      八馬正幸
    • Journal Title

      水環境学会誌 26(8)

      Pages: 507-514

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Suggestion of the Quantitative Evaluation Method of Purification Ability on Tidai Flat2003

    • Author(s)
      Tadashi Hibino
    • Journal Title

      Proceedings of Coastal Engineering, JSCE Vol.50 (2)

      Pages: 1071-1075

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A study on sludge accumulation mechanism on flat sheet membrane surface in ubmerged membrane bioreactor2003

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Proceedings of International Conference on Civil and Evironmental Engineering ICCEE-2003

      Pages: 177-186

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Photochemical and Microbial Degradations of Dissolved Organic Matter and Their Influences on Excitation-Emission Matrix2003

    • Author(s)
      Masayuki Hachiuma
    • Journal Title

      Journal of Japan Society on Water Environment Vol.26(8)

      Pages: 507-514

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Dispersion and dry and wet deposition of PAHs in an atmospheric environment

    • Author(s)
      Noriatsu Ozaki
    • Journal Title

      Proceedings of 8th International conference on Diffuse/Nonpoint Pollution, 2004. no page mention

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Publications] 田多一史: "海底の生物環境に係わる浮泥特性についての現地調査"第58回年次学術講演会講演概要集. 537-538 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kazufumi Tada: "The Seasonal Movement of the Fluid Mud and the Consolidated Sediment in the Hiroshima Bay"Abstracts of 88^<th> ESA Annual Meeting. 330 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kazufumi Tada: "The Movement of Pore Water in Sea Bottom Sediment"Proceedings of International Conference on Civil and Environmental Engineering, ICCEE-2003. 271-278 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Kazufumi Tada: "The Characteristic of Fluid Mud and Coastal Water Quality in the Hiroshima bay"Proceedings of 2^<nd> International Conference, APAC2003. (CD-Rom). (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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