洪水時の河道内植生による流水抵抗の逆推定手法の検討

• 吉田 圭介

  岡山大学 環境生命科学研究科

• 前野 詩朗

  岡山大学 環境生命科学研究科

書誌事項

タイトル別名

• INVERESE ESTIMATION METHOD OF FLOW RESISTANCE ATTRIBUTABLE TO VEGETATION IN FLOODED RIVERS
• コウズイジ ノ カドウ ナイショクセイ ニ ヨル リュウスイ テイコウ ノ ギャクスイテイ シュホウ ノ ケントウ

抄録

 Inverse estimation of the flow resistance (or bed roughness) because of thick vegetation in the flooded rivers was conducted using variational and sequential data assimilation methods. An adjoint method and a particle filtering technique were effectively used with the shallow-water model for searching optimum values of distributed Manning's roughness coefficients in both space and time. These data assimilation methods were applied to the flooded Asahi River which occurred in September 2011. The assimilated data were water levels that were longitudinally observed in the target reach using 18 water-stage recorders. Results showed that the optimum roughness coefficients analyzed by two methods present the similar trend in both space and time. They also showed such a trend is closely related with the establishment of type of dominant vegetation and vegetation wash-out phenomena during flooding.

収録刊行物

• 土木学会論文集Ｂ１（水工学）

  土木学会論文集Ｂ１（水工学） 72 (4), I_1075-I_1080, 2016

  公益社団法人 土木学会

キーワード

• flow resistance
• vegetation
• flooding
• field survey
• variational & sequential data assimilation

詳細情報

• CRID: 1390001205353664256
• NII論文ID: 130005311958
• NII書誌ID: AN10426673
• ISSN: 18808751
• ISSN: 2185467X
• ISSN: 09167374
• DOI: 10.2208/jscejhe.72.i_1075
• NDL書誌ID: 027186276
• Web Site: http://id.ndl.go.jp/bib/027186276
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027186276
• Web Site: https://www.jstage.jst.go.jp/article/jscejhe/72/4/72_I_1075/_pdf
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可