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Elucidation of levee breach generation mechanism and flood flow behavior considering sediment concentration

Research Project

Project/Area Number 19K04958
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 25030:Disaster prevention engineering-related
Research InstitutionNational Institute of Technology, Toyota College

Principal Investigator

Tanaka Takayuki  豊田工業高等専門学校, 環境都市工学科, 准教授 (70548437)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords河道湾曲流 / 破堤解析 / 高濃度流 / 開水路流 / 開水路乱流 / 破堤氾濫解析 / 土砂濃度
Outline of Research at the Start

大型台風や集中豪雨による被害は毎年のように発生しており,堤防の決壊や越水による洪水氾濫対策が急務となっている.これまでの破堤発生河道形状に関しては湾曲部のみでなく直線部でも発生しており,より詳細な破堤発生メカニズムの解明に早急に取り組む必要がある.また,破堤が発生する場合においては土砂を多く含む状態となることが考慮されておらず,様々な土砂濃度における流れの解析が必要となる.そこで本研究では,様々な河道法線形状を対象に,洪水発生時の破堤発生メカニズムを明らかにするとともに,土砂濃度の違いが破堤発生状況に与える影響について解明する.

Outline of Final Research Achievements

Due to frequent heavy rain disasters, floods due to levee breaches are occurring frequently. Since it is difficult to predict where a levee will break, many studies have been conducted on levee breakage using various methods. The purpose of this study is to clarify the flow structure and occurrence of levee breaches in river channels with overflows, such as Shimizu flow and high-concentration sediment flow. As a result of the research, for curved flows with overflow, the tendency of the overflow start point is affected by the difference in the curvature radius, the larger the tangential angle, the larger the overflow range, was found to occur mainly. We also clarified the flow structure in fresh water and high-concentration flow with various boundary conditions such as piers and vegetation.

Academic Significance and Societal Importance of the Research Achievements

湾曲部を伴う河道の流れ構造や破堤発生メカニズムを明らかにすることで,破堤箇所の想定がより容易となり,河道整備の優先順位を決定する上で重要な知見を得ることができる.
また,様々な流体粘性における流動機構を明らかにすることで,洪水時の実河川の流れ構造を予測するための知見を得ることができる.さらに,橋脚や植生などの境界条件を有する開水路流れの流れ構造を知ることで,洪水流の挙動についても予見することが可能となる.

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2022 2021 2020 2019

All Journal Article (8 results) (of which Peer Reviewed: 6 results,  Open Access: 2 results) Presentation (11 results)

  • [Journal Article] Bank Breakage Around River Bends and Flood Flow Behavior in Non-Overflow Condition2022

    • Author(s)
      Takayuki Tanaka, Ryuki Harata and Syun Tsutsui
    • Journal Title

      39th IAHR World Congress

      Volume: - Pages: 4968-4974

    • DOI

      10.3850/iahr-39wc252171192022105

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] FLOW MECHANISM OF OPEN CHANNEL FLOW WITH DISCONTINUOUS VEGETATION IN THE FLOW DIRECTION FOR OVERFLOW CONDITIONS2022

    • Author(s)
      田中貴幸,市原大暉,大本照憲
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

      Volume: 78 Issue: 2 Pages: I_601-I_606

    • DOI

      10.2208/jscejhe.78.2_I_601

    • ISSN
      2185-467X
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of Difference in River Channel Curved Shape on Open Channel Turbulence Accompanied by Overflow2022

    • Author(s)
      狭間俊哉,田中貴幸,酒井大輝,筒井駿
    • Journal Title

      Journal of National Institute of Technology, Toyota College

      Volume: 54 Issue: 0 Pages: n/a

    • DOI

      10.20692/toyotakosenkiyo.54-3

    • NAID

      130008154245

    • ISSN
      0286-2603, 2424-2276
    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] INFLUENCE OF DIFFERENCE IN FLUID VISCOSITY ON OPEN CHANNEL FLOW WITH BRIDGE PIER2021

    • Author(s)
      田中貴幸,原田龍希,大本照憲
    • Journal Title

      Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)

      Volume: 77 Issue: 2 Pages: I_859-I_864

    • DOI

      10.2208/jscejhe.77.2_I_859

    • NAID

      130008160226

    • ISSN
      2185-467X
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Study on the physical habitat of river channel vegetation designated as an endangered species2021

    • Author(s)
      Takayuki Tanaka, Syunya Hazama, and Ryuki Harata
    • Journal Title

      9th INTERNATIONL SYMPOSIUM ON ENVIRONMENTAL HYDRAULICS

      Volume: - Pages: 121-123

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] EFFECT OF DIFFERENCE IN SHAPE OF STEPPED FISHWAY ON FLOW STRUCTURE2020

    • Author(s)
      TAKAYUKI TANAKA, KEIGO AOKI
    • Journal Title

      22nd IAHR-APD Congress 2020

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Analysis of bank breakage around river bends and flood flow behavior in non-overflow condition2020

    • Author(s)
      田中 貴幸, 澤 洸太, 狭間 俊哉
    • Journal Title

      Journal of National Institute of Technology, Toyota College

      Volume: 52 Issue: 0 Pages: n/a

    • DOI

      10.20692/toyotakosenkiyo.52-1

    • NAID

      130007801676

    • ISSN
      0286-2603, 2424-2276
    • Related Report
      2019 Research-status Report
    • Open Access
  • [Journal Article] TURBULENT STRUCTURE IN OPEN CHANNEL WITH LONGITUDINALLY CONTINUOUS SIDE CAVITIES2019

    • Author(s)
      TAKAYUKI TANAKA, TERUNORI OHMOTO
    • Journal Title

      38th IAHR World Congress

      Volume: - Pages: 5137-5144

    • DOI

      10.3850/38wc092019-0640

    • NAID

      130007757940

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 粗面開水路流れにおける高濃度土砂の抵抗特性および流れ場に与える影響2022

    • Author(s)
      大本照憲,安達幹治,田中貴幸
    • Organizer
      日本流体力学会年会2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 様々な柱状物体を有する開水路の流れ構造解析2022

    • Author(s)
      市薗泰寿,田中貴幸,筒井駿
    • Organizer
      令和4年度 土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 流体粘性の変化が様々な橋脚配置条件における開水路流の流動機構に与える影響2022

    • Author(s)
      中根堅太,田中貴幸,筒井駿
    • Organizer
      令和4年度 土木学会中部支部研究発表会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 流体粘性の違いが橋脚を有する開水路流の流動機構に与える影響2022

    • Author(s)
      筒井 駿,田中 貴幸,原田 龍希
    • Organizer
      令和3年度 土木学会中部支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 越流を伴う河道湾曲流の流れ構造解析2022

    • Author(s)
      酒井 大輝,狭間 俊哉,田中 貴幸,北畠 正巳
    • Organizer
      令和3年度 土木学会中部支部研究発表会
    • Related Report
      2021 Research-status Report
  • [Presentation] 橋脚を有する高濃度流の流動機構2021

    • Author(s)
      原田 龍希,田中貴幸
    • Organizer
      令和2年度 土木学会中部支部研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 越流状態における植生開水路流れの三次元乱流構造解析2021

    • Author(s)
      青木 慶吾,田中貴幸
    • Organizer
      令和2年度 土木学会中部支部研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 河道湾曲形状の違いが氾濫流の流れ構造に与える影響2021

    • Author(s)
      狭間 俊哉,田中貴幸,舩橋 良太
    • Organizer
      令和2年度 土木学会中部支部研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 逢妻川におけるハイブリッド水制周辺の流れ構造と浮遊物質挙動に関する数値解析2021

    • Author(s)
      松岡 陽生,田中貴幸
    • Organizer
      令和2年度 土木学会中部支部研究発表会
    • Related Report
      2020 Research-status Report
  • [Presentation] 様々な河道湾曲形状における洪水氾濫挙動解析2020

    • Author(s)
      狭間 俊哉,田中 貴幸,炭竃 大輔
    • Organizer
      平成30年度 土木学会中部支部研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] 様々な植生配置における越流状態の開水路流動機構2020

    • Author(s)
      志智 海斗,田中 貴幸,青木 慶吾
    • Organizer
      平成30年度 土木学会中部支部研究発表会
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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