堤防破口の流出を定量化するための概念モデル
Leon S Besseling1, Anouk Bomers1, Jord J Warmink1
1University of Twente, Enschede, The Netherlands.
まとめ
この研究は,緊急計画に不可欠な堤防破裂の流出のための迅速な概念モデルを導入します. このモデルは,洪水の影響を正確に推定し,重要なイベントの際に迅速なシナリオ分析を可能にします.
科学分野:
- 水学
- 水資源管理
- 土木工学
背景:
- 水力学モデルは精度が高くても,リアルタイムで緊急事態を分析するには計算が要ります.
- コンセプトモデルにより,ダイク破裂シナリオのシミュレーションがより速く,速度と精度をバランスとすることができます.
- 堤防の破裂は,極端な川の排水時に重大なリスクをもたらし,迅速な影響評価を必要とします.
研究 の 目的:
- 堤防破口の流出に関する概念モデルを開発し,検証する.
- 様々な河川の排水状況や漏れ場所でのモデルの性能を評価する.
- 堤防破裂の結果を迅速かつ確率的に分析し,緊急の意思決定を可能にします.
主な方法:
- 堤防破裂の成長ダイナミクスを含む概念モデルの開発
- ダイク破裂の流出シミュレーション ラインの分岐に沿った様々な川の流出シナリオと場所
- 概念モデルの結果を高精度水力学モデルと比較する.
主要な成果:
- 概念モデルは,河川の排水波特性にかかわらず,堤防破裂の流出量を正確に推定します.
- 動作中の水力学モデルと比較して10~15%の誤差が得られた.
- 毎分数千のシナリオの分析を可能にし,確率的な評価を容易にする.
結論:
- 開発された概念モデルは,ダイク破裂の流出の現実的で迅速な最初の見積もりを提供します.
- 最小限の入力データと計算リソースを必要とする大規模な堤防破裂に適しています.
- 緊急事態への備えと 極端な河川流出事故への意思決定を強化します
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