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Study on the mechanism of the riparian trees expansion in a gravel-bed river and an approach to that management

Research Project

Project/Area Number 12650505
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

SHIMIZU Yoshihiko  Gunma University, Associate Professor, 工学部, 助教授 (70178995)

Co-Investigator(Kenkyū-buntansha) KOBATAKE Shigeki  Gunma University, Professor, 工学部, 教授 (00027260)
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2000: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsRiparian trees / Gravel bed-river / Robinia pseudo-acacia / 2D-flow model / Critical tractive force / Instream vegetation / 一般化座標系平面流数値計算 / 動的樹林化 / 一般化座標系平面流数値計 / 樹林化 / 一般化座標系平面流解析 / 高水敷侵食 / 掃流力
Research Abstract

Recently riparian trees in the course of gravel bed-river have extremely increased and enlarged their covered-area over bars and flood plain. Such a situation brings about problems of river management for the environmental aspects as well as the safety of rivers against flood. In order to clarify such problems, we should get the knowledge about how the instream vegetation grow up and expand their covered zones in the gravel-bed river. In this study, the cause of the excessive growth of Robinia pseudo-acacia was examined in the segment-1 reach of Watarase River. Especially, from the investigation of the annual rings of tree, it was clear that some forests of Robinia pseudo-acacia in bars were formed right after of the main flood. We show that the floods cause change of generation of the trees and rapidly expansion by the germination from fallen trees makes the excessive growth of riverine trees. Based on the field study and numerical analysis with 2D- flow model, the critical tractive force to be an index of the scale of flood disturbance is evaluated and results show that the damage scale of the riparian trees depends on the size of the critical tractive force and bed-degradation.

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (14 results)

All Other

All Publications (14 results)

  • [Publications] 清水義彦, 小葉竹重機, 新船隆行: "樹林化河道の洪水流況と浮遊砂輸送に関する数値計算"土木学会水工学論文集. 44巻. 819-824 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 清水義彦, 小葉竹重機, 岡田理志, 新船隆行, 岩崎工: "洪水撹乱によるハリエンジュの破壊・再生と河道内動的樹林化について"土木学会水理委員会河川部会,河川技術に関する論文集. 6巻. 45-50 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 清水義彦: "河道内樹林化と流れ・移動床過程について"日本学術会議メカニクス・構造研究連絡委員会, 第50回理論応用力学講演会講演論文集. 50巻. 53-54+ (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 清水義彦, 小葉竹重機, 岡田理志: "ハリエンジュによる河道内動的樹林化について"土木学会水工学論文集. 45巻. 1099-1104 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yoshihiko SHIMIZU, Shigeki KOBATAKE, Takayuki ARAFUNE: "Numerical study on the flood-flow stage in a gravel-bed river with the excessive riverine trees"Annual Journal of Hydraulic Engineering, JSCE. Vol. 44. 819-824 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yoshihiko SHIMIZU, Shigeki KOBATAKE, Satoshi OKADA, Takayuki ARAFUNE, Takumi IWASAKI: "Study on the expansion of riverine trees in gravel-bed river caused by flood disturbance"Advances in River Engineering, JSCE. Vol. 6. 59-64 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yoshihiko SHIMIZU, Shigeki KOBATAKE, Satoshi OKADA: "Study on the expansion of robinia pseudo-acacia in gravel-bed river caused by flood disturbance"Annual Journal of Hydraulic Engineering, JSCE. Vol. 45. 1099-1104 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Yoshihiko SHIMIZU: "The study on the riverine trees expansion caused by the flood disturbance"The 50^<th> Nat. Cong. of Theoretical and Applied Mechanics. 53-54 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 清水義彦, 小葉竹重機, 新船隆行: "樹林化河道の洪水流況と浮遊砂輸送に関する数値計算"土木学会水工学論文集. 44巻. 819-824 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 清水義彦, 小葉竹重機, 岡田理志: "ハリエンジュによる河道内動的樹林化について"土木学会水工学論文集. 45巻. 1099-1104 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 清水義彦: "河道内樹林化と流れ・移動床過程について"日本学術会議メカニクス・構造研究連絡委員会 第50回理論応用力学講演会講演論文集. 50巻. 53-54 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 清水義彦,小葉竹重機,岡田理志,新船隆,岩崎工: "洪水撹乱によるハリエンジュの破壊・再生と河道内樹林化について"河川技術に関する論文集. 6巻. 59-64 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 清水義彦,小葉竹重機,岡田理志,岩崎工,吉川武志: "洪水撹乱による河道内樹林化について"土木学会第55回年次学術講演会講演概要集. 55巻. II-316 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 清水義彦: "河道内樹林化と流れ・移動床過程について"日本学術会議メカニクス・構造研究連絡委員会,第50回理論応用力学講演会講演論文集. 50巻. 53-54 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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