Computations of Real Scale Experiment on Levee Breach with a 2D Shallow Flow Model
Computations of Real Scale Experiment on Levee Breach with a 2D Shallow Flow Model
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用二维浅流模型计算堤坝溃决的真实规模试验
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
I. Kimura
中科院分区：
文献类型：
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作者：
Hiroki Zenno;T. Iwasaki;Y. Shimizu;I. Kimura
河流洪水是世界上常见的灾害。如果决堤发生，有时会造成致命的灾难。此外，许多建筑物、城市设施、生命线等遭到严重破坏。决堤的具体机制尚未明确。因此，预测河堤崩塌过程和溢流行为对减少洪涝灾害具有重要意义。将二维浅流计算模型应用于溢流引起的堤防决口现象，并对模型的性能进行了说明。通过与现场实验数据的对比，对数值模型进行了标定。近日，在日本千代田试验水道进行了堤防决口的实尺试验。在实验中，我们在相同的条件下进行了计算。计算结果与实验结果吻合较好。
Flood in rivers is a common disaster all over the world. If a levee breach happens, it sometimes causes a fatal disaster. In addition, many buildings, urban facilities, lifelines, etc. are seriously damaged. Detailed mechanism of a levee breach has not been clarified yet. Therefore, it is important to predict the collapsing process of riverbank and behaviour of overtopping flow for reducing flood damage. We applied a two-dimensional shallow flow computational model to levee breach phenomena caused by overflow and the performance of the model was elucidated. Numerical model calibration is made through the comparison with a field experimental data. Recently, a real-scale experiment on a levee breach was carried out at the Chiyoda Experimental Channel in Japan. We performed the computation under the same conditions in the experiment. The computational results showed the excellent agreement with experiment for simulating levee breach phenomena.