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Sediment Flushing from Sabo Dams and its Environmental Impact on River

Research Project

Project/Area Number 11660147
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., Graduate School of Agriculture, Associate Professor, 農学研究科, 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) 1999 – 2000
Project Status Completed (Fiscal Year 2000)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
Keywordssediment flush / river environment / sabo dams / fishes / turbidity water / riverbed variation / sediment runoff control / eco-system / 階段状河床 / ハビタット / 土砂流出
Research Abstract

The habitat of fishes and aquatic insects must deteriorate by passing of turbidity water and sediment when the deposit in sabo dams is released all at once to the river where the sediment transport becomes not active. ln this research, we have investigated the riverbed variation by a series of sabo dams and studied how they influence the habitat. Moreover, the impact that the artificial sediment flushing from sabo dams gives to the habitat in mountain streams is investigated from some field experiments and numerical simulations. The following results were obtained :
1.Riverbed variation by a series of sabo dams
(1)The effect of a series of sabo dams cannot be estimated by the addition of the effect of a single sabo dam.
(2)Because much sediment would be flushed from slit sabo dams when the water discharge decreases at floods, the impact to the habitat might be severe.
2.Movement of the sediment artificially flushed from sabo dams
(1)The calculation program for analyzing the movement of the bed load was presented. The program could explain the deposition and erosion process in pools.
3.Influence of sediment movement on the environment in habitat of fishes
(1)The indices such as turbidity, dissolved oxygen, sediment storage capacity of pools, the space scale between gravels and cobbles, sediment deposition depth on riverbed, plane shape of streams are important in evaluation of the influence of sediment flushing.
(2)The above-mentioned program was applicable to the evaluation of impacts by sediment flushing and recovering to the original riverbed.
(3)The relation between the influence level and the stress index for char was experimentally clarified, and the sediment flushing condition with a little influence was presented.

Report

(3 results)
  • 2000 Annual Research Report   Final Research Report Summary
  • 1999 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] 藤田正治: "砂防ダムからの排出土砂の移動とそれが渓流環境に与える影響"水工学論文集. 第44巻. 1215-1221 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujita, M.: "A diffusion model of suspended sediment in mountain streams"Proceedings of 12th Congress of APD-IAHR. 255-264 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 藤田正治: "砂防ダム群の土砂流出調節効果"水工学論文集. 第45巻. 697-703 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 水山高久: "砂防ダム・スリット砂防ダムの効果評価"平成11年度砂防学会研究発表会概要集. 180-181 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 吉清 守: "砂防ダムからの排砂が魚類に与える影響の評価法"平成12年度砂防学会研究発表会概要集. 374-375 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 木下篤彦: "砂防ダムからの排砂が渓流河床の非一様性に与える影響"平成12年度砂防学会研究発表会概要集. 376-377 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] (社)砂防学会: "山地河川における河床変動の数値計算法"山海堂. 143 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujita, M.: "Movement of sediment removed from a sabo dam and its impact on river environment"Annual Journal on Hydraulic Engineering. Vol.44. 1215-1221 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujita, M.: "A diffusion model of suspended sediment in mountain streams"Proceedings of 12 th Congress of APD-IAHR. 255-264 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Fujita, M.: "Sediment runoff control by a series of sabo dams"Annual Journal on Hydraulic Engineering. Vol.45. 697-703 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Mizuyama, T.: "Effect evaluation of sabo dams of closed and open types"Proceedings of Annual conference of Japan Erosion Control Society. 180-181 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Yoshikiyo, M.: "A method for evaluating the influence of sediment flushing from sabo dams on fishes and their habitat"Proceedings of Annual conference of japan Erosion Control Society. 374-375 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Kinoshita: "An Influence of sediment flushing from sabo dams on non-uniformity of mountain stream bed structure"Proceedings of Annual conference of Japan Erosion Control Society. 376-377 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] Mizuyama, T.: "A method for calculating bed variation in mountain Streams"Sankai-do. 143 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2000 Final Research Report Summary
  • [Publications] 藤田正治: "砂防ダムからの排出土砂の移動とそれが渓流環境に与える影響"水工学論文集. 第44巻. 1215-1221 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Fujita,M: "A diffusion model of suspended sediment in mountain streams"Proceedings of 12th Congress of APD-IAHR. 255-264 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 藤田正治: "砂防ダム群の土砂流出調節効果"水工学論文集. 第45巻. 697-703 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] 水山高久: "砂防ダム・スリット砂防ダムの効果評価"平成11年度砂防学会研究発表会概要集. 180-181 (1999)

    • Related Report
      2000 Annual Research Report
  • [Publications] 吉清守: "砂防ダムからの排砂が魚類に与える影響の評価法"平成12年度砂防学会研究発表会概要集. 374-375 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 木下篤彦: "砂防ダムからの排砂が渓流河床の非一様性に与える影響"平成12年度砂防学会研究発表会概要集. 376-377 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] (社)砂防学会: "山地河川における河床変動の数値計算法"山海堂. 143 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 藤田正治: "砂防ダムからの排出土砂の移動とそれが渓流環境に与える影響"水工学論文集. 44(印刷中). (2000)

    • Related Report
      1999 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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