Study of flow resistance and its influence on rainfall runoff process

DOI
  • Kudo Shun
    Hydrologic Engineering Research Team, Hydraulic Engineering Research Group, Public Works Research Institute
  • Yorozuya Atsuhiro
    Hydrologic Engineering Research Team, Hydraulic Engineering Research Group, Public Works Research Institute
  • Harada Daisuke
    International Centre for Water Hazard and Risk Management

Bibliographic Information

Other Title
  • 洪水中の流水抵抗変化の分析とそれを踏まえた降雨流出解析

Abstract

This study aims to investigate flow resistance and its influence on hydrographs during a flood in the Omoto River. Flow resistance at the Akashika station where water level was observed during the target flood was studied, focusing on form resistance due to sand waves, vegetation over floodplain and eddies due to interaction between floodplain and main-channel. The result show that integrated roughness coefficient increases possibly up to 0.061 m-1/3s at maximum water level with developed sand waves, on the other hand, integrated roughness coefficient takes value of 0.052 m-1/3s in the transition regime. Computed results on rainfall runoff process considering roughness change discussed above show that especially water level has a high sensitivity to flow resistance, and that simulated water level reproduced observed one accurately in the case that increase of roughness is incorporated into a model.

Journal

Details 詳細情報について

  • CRID
    1390001205713530752
  • NII Article ID
    130006236373
  • DOI
    10.11520/jshwr.30.0_76
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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