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Field investigation and numerical simulation of long-term sedimentary processes in a bay

Research Project

Project/Area Number 15360263
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 水工水理学
Research InstitutionYokohama National University

Principal Investigator

SASAKI Jun  Yokohama National University, Graduate School of Engineering, Associate Professor (50292884)

Co-Investigator(Kenkyū-buntansha) SHIBAYAMA Tomoya  Yokohama National University, Graduate School of Engineering, Professor (40143391)
島谷 学  五洋建設(株), 技術研究所, 主任研究員 (40343173)
Project Period (FY) 2003 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥13,600,000 (Direct Cost: ¥13,600,000)
Fiscal Year 2006: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 2005: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2004: ¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 2003: ¥4,100,000 (Direct Cost: ¥4,100,000)
KeywordsBay / Sediment environment / Numerical model / Long-term reproduction / Environmental record / Sediment grain size / Water content / Organic analysis / 内湾環境 / 長期予測 / 底泥堆積 / 環境再現計算
Research Abstract

We first conducted a field survey to reveal the thickness of polluted mud layer in Tokyo Bay using a method of bottom sounding based on two supersonic waves. There were, however, some problems for this method. We thus tried to reveal spatial variation in mud quality directly on the basis of sediment core sampling. We developed a core sampling method using an Ekman barge sampler altered to take mud core samples efficiently. We collected more than 50 core samples in the inner part of the bay and sliced them every about 1cm from the surface of the sediment to the deep layer. Then we measured water content, sediment grain size distribution, total organic carbon and nitrogen, and carbon and nitrogen stable isotope ratio. We elucidated higher organic content mud is accumulated around the central part of the inner bay while lower organic content sediment is accumulated around it. A three-dimensional and multi-class sediment accumulation model was developed to reproduce and understand the sediment accumulation processes considering the variation in sediment grain size. We reproduced muddy sediment accumulation processes in the bay. On the basis of field investigation and numerical experiments as well as former field data, we analyzed the mechanism of the formation of these sedimentary processes such that finer particles adsorb larger amount of organic matter and settling and resuspension processes are dominant factors. Moreover, observed lower C/N values at the central part are also one of the major causes of the formation of spatial variation in sediment quality because the waters in the central part are exposed to hypoxia for longer time than those of their surrounding waters, which makes the rate of mineralization lower.

Report

(5 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • Research Products

    (39 results)

All 2007 2006 2005 2004

All Journal Article (39 results)

  • [Journal Article] 東京湾奥中央部における軟泥の形成要因に関する一考察2007

    • Author(s)
      佐々木 淳・佐藤 雄太・Thamnoon Rasmeemasmuang・柴山 知也
    • Journal Title

      海岸工学論文集 54

      Pages: 1046-1050

    • NAID

      130003807930

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A numerical analysis of hydrodynamic effect on bottom sediment characteristic in Sanbanze shallows of Tokyo Bay-Japan2007

    • Author(s)
      Achiari, Hendra, Jun Sasaki
    • Journal Title

      Proceeding of the 1st International Conference of European Asian Civil Engineering Forum(EACEF)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Field investigation and numerical modeling of solft mudaccumulation in an estuarine embayment2007

    • Author(s)
      Sasaki, Jun, Thamnoon Rasmeemasmuang
    • Journal Title

      ndo-Japan Workshop on Coastal Problems and Mitigation Measures-Including the Effects of Tsunami-

      Pages: 58-67

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 内湾における粒径を考慮した底質堆積モデルの開発2007

    • Author(s)
      Thamnoon Rasmeemasmuang・佐々木 淳
    • Journal Title

      海洋開発論文集 23

      Pages: 1141-1146

    • NAID

      130003950764

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 横浜港における底質環境特性に関する現地調査2007

    • Author(s)
      佐々木 淳・角田 篤
    • Journal Title

      海洋開発論文集 23

      Pages: 1147-1152

    • NAID

      130003950765

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Simple methodology for environmental evaluation of tidalflats and shallows focusing on oxygen consumption rate2007

    • Author(s)
      Sasaki, Jun, Shusaku Maeda
    • Journal Title

      Proc.4the Int.Conf on Asian and Pacific Coasts (in CD-ROM)

      Pages: 14-14

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Integrated modeling for formation and characteristics of sediment layer in Tokyo Bay2007

    • Author(s)
      Thamnoon Rasmeemasmuang, Jun Sasaki
    • Journal Title

      Proc.4the Int.Conf on Asian and Pacific Coasts (in CD-ROM)

      Pages: 15-15

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Analysis of Wind-Wave Climate Change and Spatial Distribution of Bottom Sediment Properties in Sanbanze Shallows of Tokyo Bay2007

    • Author(s)
      Achiari, Hendra, Jun Sasaki
    • Journal Title

      J.Coastal Res SI50

      Pages: 343-347

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Discussion on the Causes of the Formation of Soft Mud at the Head of Tokyo Bay2007

    • Author(s)
      Sasaki, Jun, Sato, Yuta, Rasmeemasmuang, Thamnoon, Shibayama, Tomoya.
    • Journal Title

      Annual J. Coastal Eng., JSCE(in Japanese)

      Pages: 1046-1050

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] A numerical analysis of hydrodynamic effect on bottom sediment characteristic in Sanbanze shallows of Tokyo Bay-Japan2007

    • Author(s)
      Hendra Achiari, Jun Sasaki.
    • Journal Title

      Proceeding of the 1st International Conference of European Asian Civil Engineering Forum(EACEF) 2007 in Universitas Pelita Harapan, Indonesia

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Field investigation and numerical modeling of soft mud accumulation in an estuarine embayment2007

    • Author(s)
      Sasaki, Jun, Thamnoon Rasmeemasmuang.
    • Journal Title

      Indo-Japan Workshop on Coastal Problems and Mitigation Measures-Including the Effects of Tsunami-.

      Pages: 58-67

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Modeling of sediment accumulation in a bay consiering grain size variation2007

    • Author(s)
      Rasmeemasmuang, Thamnoon, Jun Sasaki.
    • Journal Title

      Annual J. Civil Engineering in the Ocean, JSCE(in Japanese) Vol.23

      Pages: 1141-1146

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Field survey on sediment properties in Yokohama Port of Tokyo Bay2007

    • Author(s)
      Sasaki, Jun, Atsushi Kakuda.
    • Journal Title

      Annual J. Civil Engineering in the Ocean, JSCE(in Japanese) Vol.23

      Pages: 1147-1152

    • NAID

      130003950765

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Simple methodology for environmental evaluation of tidal flats and shallows focusing on oxygen consumption rate2007

    • Author(s)
      Sasaki, Jun, Shusaku Maeda.
    • Journal Title

      Proc. 4the Int. Conf on Asian and Pacific Coasts

      Pages: 14-14

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Integrated modeling for formation and characteristics of sediment layer in Tokyo Bay2007

    • Author(s)
      Thamnoon Rasmeemasmuang, Jun Sasaki.
    • Journal Title

      Proc. 4the Int. Conf on Asian and Pacific Coasts

      Pages: 15-15

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Analysis of Wind-Wave Climate Change and Spatial Distribution of Bottom Sediment Properties in Sanbanze Shallows of Tokyo Bay2007

    • Author(s)
      Achiari, Hendra, Jun Sasaki
    • Journal Title

      J. Coastal Res. SI50

      Pages: 343-347

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical Analysis of Wind-Wave Climate Change and Spatial Distribution of Bottom Sediment Properties in Sanbanze Shallows of Tokyo Bay2007

    • Author(s)
      Hendra Achiari, Jun Sasaki
    • Journal Title

      Journal of Coastal Research SI50

      Pages: 5-5

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Numerical simulation of cohesive and non-cokesive sedimentaccumulation in Tokyo Bay2006

    • Author(s)
      Rasmeemasmuang, Thamnoon, Jun Sasaki
    • Journal Title

      7th Int.Conf.on Hydroscience and Eng. Online

      Pages: 17-17

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Nnumerical analysis of characteristics of annual accumulated sediment in Tokyo Bay2006

    • Author(s)
      Rasmeemasmuang Thamnoon, Jun Sasaki
    • Journal Title

      Proc.Techno-Ocean 2006/19th JASNAOE Ocean Eng.Symp (in CD-ROM)

      Pages: 8-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 東京湾流域圏におけるリン循環の推定と社会的変化による応答予測2006

    • Author(s)
      上田 嘉通・佐々木 淳
    • Journal Title

      海岸工学論文集 53

      Pages: 1376-1380

    • NAID

      130003991907

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 酸素消費速度に着目した干潟・浅瀬の環境評価2006

    • Author(s)
      佐々木 淳・前田 周作
    • Journal Title

      海岸工学論文集 53

      Pages: 1046-1050

    • NAID

      130003991835

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical simulation of cohesive and non-cohesive sediment accumulation in Tokyo Bay2006

    • Author(s)
      Rasmeemasmuang, Thamnoon, Jun Sasaki
    • Journal Title

      7th Int. Conf. on Hydroscience and Eng.

      Pages: 17-17

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical analysis of characteristics of annual accumulated sediment in Tokyo Bay2006

    • Author(s)
      Rasmeemasmuang Thamnoon, Jun Sasaki
    • Journal Title

      Proc. Techno-Ocean 2006/19th JASNAOE Ocean Eng. Symp.

      Pages: 8-8

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Estimation of phosphorus cycling in catchement area of Tokyo Bay and its response to change in eating habits2006

    • Author(s)
      Ueda, Yoshimichi, Jun Sasaki.
    • Journal Title

      Annual J. Coastal Eng., JSCE(in Japanese) 53

      Pages: 1376-1380

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Environmental evaluation of tidal flats focusing on oxygen consumption rate2006

    • Author(s)
      Sasaki, Jun, Shusaku Maeda.
    • Journal Title

      Annual J. Coastal Eng., JSCE(in Japanese) 53

      Pages: 1046-1050

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Numerical simulation of cohesive and non-cohesive sediment accumulation in Tokyo Bay2006

    • Author(s)
      Thamnoon Rasmeemasmuang, Jun Sasaki
    • Journal Title

      Proc. 7th Int. Conf. on Hydroscience and Eng. Onling

      Pages: 17-17

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Numerical analysis of characteristics of annual accumulated sediment in Tokyo Bay2006

    • Author(s)
      Thamnoon Rasmeemasmuang, Jun Sasaki
    • Journal Title

      Proc. Techno-Ocean 2006/19th JASNAOE Ocean Eng. Symp. Onling

      Pages: 8-8

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 東京湾流域圏におけるリン循環の推定と社会的変化による応答予測2006

    • Author(s)
      上田嘉通, 佐々木 淳
    • Journal Title

      海岸工学論文集 53

      Pages: 1376-1380

    • NAID

      130003991907

    • Related Report
      2006 Annual Research Report
  • [Journal Article] 酸素消費速度に着目した干潟・浅瀬の環境評価2006

    • Author(s)
      佐々木 淳, 前田周作
    • Journal Title

      海岸工学論文集 53

      Pages: 1046-1050

    • NAID

      130003991835

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Spatial characteristics of soft-mud accumulation in innterpart of Tokyo Bay,Japan2005

    • Author(s)
      Sasaki, J., M. Igarashi
    • Journal Title

      Proc.3rd Int.Conf.on Asian and Pacific Coasts (in CD-ROM)

      Pages: 943-955

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spatial characteristics of soft-mud accumulation in innter part of Tokyo Bay, Japan2005

    • Author(s)
      Sasaki, J., M. Igarashi
    • Journal Title

      Proc. 3rd Int. Conf. on Asian and Pacific Coasts

      Pages: 943-955

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spatial characteristics of soft-mud accumulation in inner part of Tokyo Bay, Japan2005

    • Author(s)
      Sasaki, J., Igarashi, M
    • Journal Title

      Proc.of 3rd Int.Conf.on Asian and Pacific Coasts

      Pages: 943-955

    • Related Report
      2005 Annual Research Report
  • [Journal Article] 東京湾三番瀬の猫実川河口域における底泥堆積環境の空間特性とその形成要因2004

    • Author(s)
      佐々木 淳・赤枝 耕次・Hendra, Achiari
    • Journal Title

      海岸工学論文集 51

      Pages: 996-1000

    • NAID

      130003807918

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 東京湾奥部における浮泥堆積層厚の空間分布特性2004

    • Author(s)
      五十嵐 学・佐々木 淳
    • Journal Title

      海岸工学論文集 51

      Pages: 981-985

    • NAID

      130003807915

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spatial Distribution of Mud Accumulation and Cause of Its Formation over the Nekozanegawa River Mouth in Sanbanze Shallows of Tokyo Bay2004

    • Author(s)
      Sasaki, Jun, Koji Akaeda, Hendra Achiari.
    • Journal Title

      Annual J. Coastal Eng., JSCE(in Japanese) Vol.51

      Pages: 996-1000

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Spatial Characteristics of Mud Layer Thickness in Inner Part of Tokyo Bay2004

    • Author(s)
      Igarashi, Manabu, Jun Sasaki.
    • Journal Title

      Annual J. Coastal Eng., JSCE(in Japanese) Vol.51

      Pages: 981-985

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] 東京湾三番瀬の猫実川河口域における底泥堆積環境の空間特性とその形成要因2004

    • Author(s)
      佐々木淳, 赤枝耕次, Hendra, Achiari
    • Journal Title

      海岸工学論文集 51

      Pages: 996-1000

    • NAID

      130003807918

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 東京湾奥部における浮泥堆積層厚の空間分布特性2004

    • Author(s)
      五十嵐 学, 佐々木 淳
    • Journal Title

      海岸工学論文集 51

      Pages: 981-985

    • NAID

      130003807915

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 窪地海域を対象とした微細気泡エアレーションによる貧酸素水改善効果の解析2004

    • Author(s)
      田中真史, 佐々木 淳, 柴山知也, 磯部雅彦
    • Journal Title

      海岸工学論文集 51

      Pages: 1161-1165

    • NAID

      130003807668

    • Related Report
      2004 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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