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Elucidation of Spatio-temporal Scale Dependence of Rainfall-Runoff Processes Using Soft Data(Fostering Joint International Research)

Research Project

Project/Area Number 16KK0142
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Allocation TypeMulti-year Fund
Research Field Hydraulic engineering
Research InstitutionFukushima University

Principal Investigator

YOKOO Yoshiyuki  福島大学, 共生システム理工学類, 教授 (90398503)

Project Period (FY) 2017 – 2022
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Keywordsスケール / 依存性 / 水質 / 逆推定 / 降雨流出過程 / 応答関数 / 滞留時間 / 降雨流出氾濫モデル / 仮想実験 / 流域面積 / 空間代表性 / 水工水理学 / 水循環 / 水資源 / 地理情報システム(GIS) / 水圏現象
Outline of Final Research Achievements

The present study aimed to clarify why the dominant rainfall-runoff processes in a watershed vary with the watershed area and how they appear. To this end, we investigated the relationship between watershed area and the dominant rainfall-runoff processes for a watershed that had multiple river discharge observation points along the main river. The dominant rainfall-runoff processes in the watershed were estimated using the "Inverse estimation and modeling method of rainfall-runoff processes" developed by the principal investigator. The results showed that the number of dominant rainfall-runoff processes and the recession characteristics of river discharge changed as the watershed area increased. We verified the results from the viewpoint of water quality data, and we found our findings were reasonable from the viewpoint of water quality data.

Academic Significance and Societal Importance of the Research Achievements

本研究は,流域内の主要な降雨流出過程が流域面積に応じて変化することを指す「降雨流出過程のスケール依存性」が発現する理由とその発現メカニズムの全容解明につながる多くの知見を得た.長年,「降雨流出過程のスケール依存性」が存在することは分かっていたが,その発現要因や発現メカニズムを明らかになっていなかった.しかし,研究代表者が独自に開発した「降雨流出過程の逆推定・モデリング法」を利用することにより,初めて流域固有の降雨流出過程を一意に同定し,その流域面積への依存性が発現する様子を明らかにすることができた.この成果は水文学全体にとって大きな成果と言え,今後,流域管理等への利用が期待される成果である.

Report

(2 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (4 results)

All 2023 2022 2017

All Int'l Joint Research (1 results) Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (2 results)

  • [Int'l Joint Research] Delft University of Technology(オランダ)2017

    • Year and Date
      2017-04-01
    • Related Report
      2022 Annual Research Report
  • [Journal Article] A multiple hydrograph separation technique for identifying hydrological model structures and an interpretation of dominant process controls on flow duration curves2022

    • Author(s)
      Leong Chris、Yokoo Yoshiyuki
    • Journal Title

      Hydrological Processes

      Volume: 36 Issue: 4

    • DOI

      10.1002/hyp.14569

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] 降雨流出過程における空間代表性の発現過程の検討2023

    • Author(s)
      齋藤主馬,横尾善之
    • Organizer
      令和4年度土木学会東北支部技術研究発表会,II-52,東北工業大学(オンライン),2023年3月4日
    • Related Report
      2022 Annual Research Report
  • [Presentation] A data-based modeling approach of rainfall-runoff processes: its development history and a blueprint for the future2022

    • Author(s)
      Yoshiyuki Yokoo
    • Organizer
      The 10th International Symposium on Water Environment Systems - with Perspective of Global Safety, Tohoku University, Hybrid, December 9, 2022
    • Related Report
      2022 Annual Research Report

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Published: 2017-03-15   Modified: 2025-01-30  

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