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Flood prediction with levee breach and evacuation route search method for small and medium rivers of insufficient hydraulic observation data

Research Project

Project/Area Number 20K05047
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 InstitutionOkayama University

Principal Investigator

Maeno Shiro  岡山大学, 環境生命科学学域, 特任教授 (20157150)

Co-Investigator(Kenkyū-buntansha) 赤穂 良輔  岡山大学, 環境生命科学研究科, 准教授 (90599333)
Project Period (FY) 2020-04-01 – 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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2021: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords水防災 / 堤防決壊予測 / 被害予測 / 内外水位差 / 避難経路 / 氾濫解析 / 精度向上 / 堤防決壊 / 中小河川 / 氾濫予測 / 避難経路予測 / 水理観測
Outline of Research at the Start

倉敷市真備地区の小田川とその支川の堤防決壊箇所について,堤防形状や植生繁茂状況などを勘案して越流箇所として事前に抽出出来るかなどをセンシングや流況解析により検証する.次年度以降は,得られた検証データを基に,真備地区に加えて岡山市内を流下する砂川を対象として測量の実施や解析等を実施し,減災のための技術の提示を図る.最終年度は,成果発表するとともに,自治体に働きかけて実装を図る.

Outline of Final Research Achievements

Due to global warming effect, severe flood damage has frequently occurred especially in small and medium rivers. Therefore, it is important to carry out flood analysis in advance and identify areas at high risk of inundation, and indicate evacuation routes during flooding beforehand. However, because the observation data necessary for accurate flood analysis is scarce for small and medium rivers, so, it is an urgent issue to improve the analysis accuracy. In this study, we clarified how to give an effective upstream end boundary conditions and how to give a levee crest height to improve the accuracy of flood analysis of small and medium rivers. In addition, it was shown that an appropriate evacuation start time can be shown by considering the evacuation time and evacuation route in the event of a levee failure.

Academic Significance and Societal Importance of the Research Achievements

近年堤防決壊を伴う大規模水害が頻発しており,特に中小河川の被害が大きい.中小河川は観測データが少ないため被害を予測するための精度良い氾濫解析が困難である.本研究で示した精度向上のための手法を用いることで多くの中小河川で氾濫解析の精度を向上させることが期待出来る.また,提案した堤防決壊が生じる箇所を推定する簡易な手法は我が国の多くの中小河川に適用できるため堤防の弱点箇所を抽出し優先的に堤防強化を図ることができる.さらに,氾濫時に時間的に変化する浸水深や歩行速度を考慮した避難経路を示すことで適切な避難開始時刻や最適な避難経路を示すことができるため防災面での工学的,社会的意義は大きい.

Report

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

    (8 results)

All 2022 2021 2020

All Journal Article (7 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 7 results,  Open Access: 3 results) Presentation (1 results)

  • [Journal Article] INUNDATION SIMULATION OF THE SUNA RIVER AND EVALUATION OF BANK BREAK USING BREACH PREDICTION METHOD2022

    • Author(s)
      赤穗良輔,西俣孝一,池尻悠人,前野詩朗
    • Journal Title

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

      Volume: 78 Issue: 2 Pages: I_667-I_672

    • DOI

      10.2208/jscejhe.78.2_I_667

    • ISSN
      2185-467X
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] INVESTIGATION OF FLOOD CONTROL MEASURES USING RICE FIELDS IN THE KARUBE RIVER BASIN OF THE TAKAHASHI RIVER SYSTEM2022

    • Author(s)
      赤穗良輔,池尻悠人,前野詩朗
    • Journal Title

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

      Volume: 78 Issue: 2 Pages: I_253-I_258

    • DOI

      10.2208/jscejhe.78.2_I_253

    • ISSN
      2185-467X
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] NUMERICAL SIMULATION OF COUPLED DEBRIS FLOW AND INUNDATION DISASTER CONSIDERING MICROTOPOGRAPHY: A CASE STUDY OF NIIMI CITY, 20192022

    • Author(s)
      Weijian HUA, Ryosuke AKOH and Shiro MAENO
    • Journal Title

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

      Volume: 78 Issue: 2 Pages: I_673-I_678

    • DOI

      10.2208/jscejhe.78.2_I_673

    • ISSN
      2185-467X
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] PREDICTION OF LEVEE BREAK DUE TO OVERFLOW USING FLOOD SIMULATION RESULTS IN MABI DISTRICT OF KURASHIKI CITY2021

    • Author(s)
      赤穗 良輔、華 威鑒、前野 詩朗
    • Journal Title

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

      Volume: 77 Issue: 2 Pages: I_367-I_372

    • DOI

      10.2208/jscejhe.77.2_I_367

    • NAID

      130008160123

    • ISSN
      2185-467X
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] EXAMINATION OF EFFECTIVE PLACEMENT OF EVACUATION SITE AND EVACUATION STARTTIME IN CONSIDERATION OF FLOODING FROM INLAND WATER AND RIVER WATER2021

    • Author(s)
      赤穗 良輔、西俣 孝一、池尻 悠人、華 威鑒、前野 詩朗
    • Journal Title

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

      Volume: 77 Issue: 2 Pages: I_1495-I_1500

    • DOI

      10.2208/jscejhe.77.2_I_1495

    • NAID

      130008160179

    • ISSN
      2185-467X
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 治水安全度向上のための流水型遊水地の試験的設計と数値実験による評価2020

    • Author(s)
      原田翔太,石川忠晴,赤穗良輔,前野詩朗
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: Vol.76,No.2 Pages: 457-462

    • NAID

      130008122644

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] 数値シミュレーションによる山間河川における流水型遊水地の水理機能に関する考察2020

    • Author(s)
      伊藤康,石川忠晴,赤穗良輔
    • Journal Title

      土木学会論文集B1(水工学)

      Volume: Vol.76,No.2 Pages: 451-456

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] 中小河川における微地形の現地測量データを用いた洪水氾濫解析の高度化に関する検討2021

    • Author(s)
      赤穗良輔、鳩野俊史、前野詩朗
    • Organizer
      第40回日本自然災害学会学術講演会
    • Related Report
      2021 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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