CONSTRUCTION OF A DISTRIBUTED MODEL THAT CAN SEPARATE DISASTER FACTORS AT BASIN WHERE FLOODING AND LANDSLIDE DISASTERS OCCURRED

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  • ODA Ryusei
    埼玉大学大学院 理工学研究科
  • TANAKA Norio
    埼玉大学大学院 理工学研究科 （兼）研究機構レジリエント社会研究センター
  • IGARASHI Yoshiya
    埼玉大学大学院 理工学研究科

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Other Title
  • 内水・外水氾濫と土砂災害が発生した流域の災害要因分離が可能な分布型モデルの構築

Abstract

<p> This study constructs a model that combines a distributed rainfall runoff flood inundation analysis and slope stability analysis for accurately analyzing river floods and landslide caused by heavy rainfall. The past rainfall data of the weather radar MP-PAWE installed at Saitama University was used for validating the model. The 10m mesh distributed rainfall-runoff flood inundation analysis and separating the floodwater by rivers or rain source, enabled a more detailed analysis of inundation patterns in tributary rivers. Further improvement in accuracy can be expected by modeling drainage channels, sewers, reservoirs, etc. The actual slope failure locations coincided with the locations where the factor of safety was reduced in the slope stability analysis. In order to accurately predict the collapse time, it is necessary to consider the vertical infiltration process of rainwater and to devise a method for setting parameters.</p>

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