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Assessment of embankment dams breaching using large scale physical modeling and statistical methods

机译：使用大型物理模型和统计方法评估堤坝溃坝

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Understanding the failure mechanisms of embankment dams due to overtopping is essential for the design of flood mitigation, flood mapping, and flood warning systems. The breach process in embankment dams can be characterized using breach parameters such as breach opening dimensions, time of breach formation, and peak breach outflow. The main objective of this study is to derive new set of statistical equations to predict the target breach parameters. A database of 126 events of embankment failure was collected and then multiple nonlinear regression analysis is used to derive the new set of equations and the uncertainty in the computed parameters was quantified. Finally, five large-scale overtopping failure tests were conducted on cohesive and non-cohesive soils embankments. The derived breach parameters equations showed good agreement with the results of the physical models for non-cohesive soil embankments, while the failure of cohesive soil embankments varied significantly with soil properties; indicating that breach parameters in cohesive soil embankment should be computed based on not only embankment dimensions but soil properties as well.
机译：了解防洪堤过高破坏的机理对于设计防洪，防洪地图和防洪预警系统至关重要。路堤大坝的破坏过程可以使用破坏参数来表征，例如破坏开口尺寸，破坏形成时间和最大破坏流出量。这项研究的主要目的是推导新的统计方程组，以预测目标违规参数。收集了126个路堤破坏事件的数据库，然后使用多元非线性回归分析来得出新的方程组，并对计算参数的不确定性进行了量化。最后，对粘性土和非粘性土路堤进行了五次大规模的超越试验。推导的破坏参数方程与非粘性土路堤的物理模型结果吻合得很好，而粘性土路堤的破坏随土壤性质而变化很大。指出应该不仅基于路堤尺寸而且还应根据土壤性质计算粘性土路堤的破坏参数。

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