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A Monitoring Method for Sediment Movement in Mountain Watershed with an Index of Turbidity

Research Project

Project/Area Number 13660146
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 林学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

FUJITA Masaharu  Kyoto Univ., Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (60181369)

Co-Investigator(Kenkyū-buntansha) SAWADA Toyoaki  Kyoto Univ., Disaster Prevention Research Institute, Associate Professor, 防災研究所, 助教授 (60027258)
MIZUYAMA Takahisa  Kyoto Univ., Graduate School of Agriculture, Professor, 農学研究科, 教授 (00229717)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2002: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 2001: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordssediment movement / monitoring / turbidity / wash load / sediment production / sediment runoff / mountain rivers / 流砂系
Research Abstract

The purpose of this research is to establish a method of monitoring sediment movement in a mountainous watershed with an index of turbidity. The turbidity and water discharge were continuously measured at an experimental dam section that is in the Ashiarai-dani experimental watershed of Hodaka Sabo Observatory of Kyoto University. The point of the study is to clarify whether the sediment movement in the upstream reach of the observation point is indirectly watched with the data. To observe the situation of sediment movement in the torrent, a video camera system set up in a headwater area in the observation reach. Also, the grain size distributions of the produced sediment, the sediment deposit and the turbidity material were investigated. The result is summarized as follows:
1. Turbid water contains the sediments and organic matter. The percentage of the organic matter was 14 to 22%. The grain size of the sediment in the turbid water is less than 0.2mm and 5 to 10 percents of the fresh sediment produced at the source are those sediments. The turbidity materials are washed out of the fresh sediment under movement. As a result, the turbidity materials were not contained in the sediment brought up to the dam section.
2. The amount of the sediment supplied from the source is estimated from the accumulated load of turbidity materials at the dam section.
3. The hysteresis curves of turbidity and water discharge represent the situation of sediment movement.
4. A method for monitoring sediment movement in mountain streams with an index of turbidity is promising.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Fujita, M.: "Monitoring of sediment movement in a small mountain watershed"Interpraevent 2002 in the Pacific Rim, Congress publication. Vol.1. 33-40 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 藤田 正治: "山地流域における濁度変化と土砂動態"水工学論文集. 第47巻. 739-745 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 藤田 正治: "山地河川の土砂動態とその観測手法"砂防学会研究発表会概要集. 82-83 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 山本 恭子: "ヒル谷流域における水と土砂の動態に関する現地観測"砂防学会研究発表会概要集. 410-411 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Fujita, M.: "Monitoring of sediment movement in a small mountain watershed"Interpraevent 2002 in the Pacific Rim, Congress publication. 33-40 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Fujita, M.: "Changes in turbidity and sediment movement in a mall mountainous watershed"Annual Journal on Hydraulic Engineering. Vol.47. 739-745 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Fujita, M.: "A method for monitoring sediment movement in a mountain region"Proceedings of Annual conference of Japan Erosion Control Society. 82-83 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Yamamoto, K.: "A field observation on rainfall and sediment runoff system is the Hiru-dani watershed"Proceedings of Annual conference of Japan Erosion Control Society. 410-411 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Fujita, M.: "Monitoring of sediment movement in a small mountain watershed"Interpraevent 2002 in the Pacific Rim, Congress publication. Vol.1. 33-40 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 藤田 正治: "山地流域における濁度変化と土砂動態"水工学論文集. 第47巻. 739-745 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 藤田 正治: "山地河川の土砂動態とその観測手法"砂防学会研究発表会概要集. 82-83 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 山本 恭子: "ヒル谷流域における水と土砂の動態に関する現地観測"砂防学会研究発表会概要集. 410-411 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Fjita, M.: "Monitoring of sediment movement in a small watershed"Interpraevent 2002 in the Pacific Rim. (発表予定). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 藤田 正治: "山地河道の土砂動態モニタリングに関する一考察"第55回土木学会年次学術講演会. II-242 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 大野 哲: "ヒル谷試験流域の土砂動態に関する観測研究"平成13年度砂防学会研究発表会概要集. 312-313 (2001)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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