DEVELOPMENT AND APPLICATION OF A COUPLED MODEL (RRI-RF2D) OF RAINFALL-RUNOFF ANALYSIS AND PLANAR TWO-DIMENTIONAL ANALYSIS FOR RIVER AND FLOOD FLOWS

DOI Web Site 10 References
  • MITSUI Nozomu
    東京理科大学大学院 創域理工学研究科社会基盤工学専攻
  • OMI Yutaro
    東京工業大学大学院 環境・社会理工学院
  • KASHIWADA Jin
    東京理科大学 創域理工学部社会基盤工学科/総合研究院マルチハザード都市防災研究拠点
  • KUBOTA Riku
    東京理科大学大学院 創域理工学研究科社会基盤工学専攻
  • ITO Takehiko
    北海道大学大学院 工学研究院
  • TANAKA Mamoru
    東京理科大学 創域理工学部社会基盤工学科
  • NIHEI Yasuo
    東京理科大学 創域理工学部社会基盤工学科/総合研究院マルチハザード都市防災研究拠点

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Other Title
  • 降雨流出解析法と河川・氾濫流用平面二次元解析法の融合（RRI-RF2D）モデルの開発と応用

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<p> For further progress of the river basin disaster resilience and sustainability by all (RBDRSA) projects, it is necessary to develop a numerical simulation model which can assess quantitatively flood risks and various flood-control measures. For this, this study proposed a coupled model with RRI (Rainfall-Runoff-Inundation) model and planar 2D model (RRI-RF2D) for river and flood flow analysis. In order to check the validity of the present model, we conducted flooding analysis in Takasaki River basin due to Typhoon Yun-yeung in 2023. The results indicated that the RRI-RF2D model can reproduce acceptably longitudinal distribution of peak water level and flooding area along the Takasaki River, showing the fundamental validity of the present model. The result also showed that the flooding water was appreciably storaged near road embankments across the river. This effect may have ensured the lead time of flooding at downstream of the road embankment, and it suggests that road embankments may play an important role as one of the flood-control measures.</p>

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