水制群を含む木曽川下流域の出水時の流れ構造とワンド地形の変遷

• 椿 涼太

  名古屋大学大学院

• 古畑 寿

  名古屋大学大学院

• 辻本 哲郎

  名古屋大学大学院

書誌事項

タイトル別名

• FLOW STRUCTURE ON GROINS DURING FLOOD EVENT AND MORPHOLOGICAL EVOLUTION OF TOPOGRAPHY

抄録

Morphological evolution of the topography of the reach with groins is investigated using a numerical model solving the two-dimensional shallow water equations in this study. A flood event is represented to discuss the dischargedependent change of the interaction between flow structure and sediment transport. The primary flow is meandering according to alternate or multiple bars formed in the channel during low-water and medium-water periods, and it is found that deposition of the fine sand and silt on vegetated area between groins is affected by the meander of primary flow. During a high-water period, on the contrary, the primary flow follows the large-scale topography of the river so that flow on the flood plain is also straightforward according to the large-scale channel form. This straightforward flow on the flood plain, formed between groins, induces three-dimensional flow structure (longitudinal vortex), develops streak go through the groins longitudinally, and forms the rib-shaped topography on the flood plain. This ribbed bathymetry is highly interacting with sediment transport not only within the flood plain but also between the channel and the flood plain.

収録刊行物

• 水工学論文集

  水工学論文集 52 691-696, 2008

  公益社団法人 土木学会

キーワード

• Kiso river
• groin
• sediment transport
• ecological functions
• ecosystem services

詳細情報

• CRID: 1390282680147988352
• NII論文ID: 130004044095
• DOI: 10.2208/prohe.52.691
• ISSN: 18849172
• ISSN: 09167374
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可