Numerical simulation of non-cohesive homogeneous dam breaching due to overtopping considering the seepage effect

Li, Yanlong; Chen, Anke; Wen, Lifeng; Bu, Peng; Li, Kangping

doi:10.1080/19648189.2020.1744481

Cited by 8 publications

(3 citation statements)

References 23 publications

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“…Simplified physics‐based models offer a good trade‐off (Wu, 2013). Without spatially distributing the flow description nor the embankment morphology, they enable simulating hydraulic and dam breach variables (e.g., time‐evolution of breach discharge and dimensions) by describing selected physical processes (Li et al., 2020; Peter et al., 2018; Tsai et al., 2019; Wu, 2013; Zhong et al., 2017). Simplified physics‐based models are computationally efficient and enable uncertainty analyses that require many runs, for example, the Monte Carlo method.…”

Section: Introductionmentioning

confidence: 99%

Global Sensitivity Analysis of a Dam Breaching Model: To Which Extent Is Parameter Sensitivity Case‐Dependent?

Schmitz

Arnst

Abderrezzak

et al. 2023

Water Resources Research

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With the surge of extreme meteorological events and intensification of urbanization downstream of hydraulic structures, the need for predicting failure of dams and dikes has become of paramount importance for establishing emergency response procedures (Zhong et al., 2021). To this end, numerical models are instrumental tools for simulating the embankment breaching process. Existing models can be classified into three categories. First, statistical (or parametric) models are based solely on regression analysis of data from past events or laboratory campaigns. They describe some breaching parameters (e.g., final breach width, failure duration or maximum breach discharge) as a function of dam or reservoir properties. These simple, computational-efficient models may lack generality because they entirely rely on data from specific cases without considering underlying physics (Chen et al., 2019;De Lorenzo & Macchione, 2014;Lee, 2019). Conversely, distributed physically based models can describe the phenomenon in greater detail, as they solve the flow and sediment governing equations using a computational mesh of the domain. Their results may be accurate but only if reliable data is available and if physical processes are numerically well represented, for example, erosion of non-homogeneous dam material, slope failure or 3D-flow patterns (Cantero-Chinchilla et al., 2019;Onda et al., 2019;Pheulpin et al., 2020;Shimizu et al., 2020). Additionally, the time required to run distributed physically based models can be substantial (ASCE, 2011). Simplified physics-based models offer a good trade-off (Wu, 2013). Without spatially distributing the flow description nor the embankment morphology, they enable simulating hydraulic and dam breach variables (e.g., time-evolution of breach discharge and dimensions) by describing selected physical processes (

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Section: Introductionmentioning

confidence: 99%

Global Sensitivity Analysis of a Dam Breaching Model: To Which Extent Is Parameter Sensitivity Case‐Dependent?

Schmitz

Arnst

Abderrezzak

et al. 2023

Water Resources Research

View full text Add to dashboard Cite

show abstract

“…The dam failure process is a complex interaction between water and sediment, involving hydraulics, soil mechanics, and sediment movement mechanics (Li et al, 2020). Most dams experienced a suite of quantitative and qualitative changes prior to failure (Wang et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Failure Modes and Progressive Failure Process of Earthen Check Dam Triggered by Upstream Flow

Zhu

Yang

et al. 2022

Front. Earth Sci.

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The progressive failure of earthen check dams triggered by upstream flow is common in loess gullies on the Loess Plateau of China. However, studies on the formation mechanism of progressive failure are still unclear. To investigate the failure modes and progressive failure process of earthen check dams, a physical model test on an earthen dam influenced by upstream flow was conducted by monitoring and analyzing hydrologic and mechanical parameters, including water content, pore water pressure, soil stress, and displacement. The test results indicate that the progressive failure process of earthen dams is induced by seepage water discharged on the downstream slope, including slope slide and overtopping. Continuous seepage results in the occurrence of creep at the toe, gradually driving the deformation and sliding of the dam slope. The progressive failure begins in the downstream slopes, and this study focuses on analyzing the initiation mechanism of slope slide. The slope failure presents retrogressive sliding, including four repeated slip failures, and each sliding presents a long-time progressive process. This physical model test reproduces the entire life cycle of earthen check dams and reveals the traction sliding mechanism of dams, which is consistent with field observation. The aforementioned results provide an important reference for understanding the failure mechanism of earthen check dams triggered by upstream flow.

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“…In engineering practice, two or more methods are usually used for prediction and mutual verification at the same time. For example, the field monitoring is often used in conjunction with the numerical simulation analysis [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Study on Finite Element Numerical Simulation of Rock Slope Based on Ground Penetrating Radar Detection

2021

IJFET

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Weathering degree of natural slope and its mechanical parameters have significant spatio-temporal variability. At present, the method of determining the mechanical parameters according to the suggestions of the specification ignores this phenomenon. In order to improve the accuracy of finite element numerical simulation results, a method for obtaining rock mass mechanical parameters based on ground penetrating radar (GPR) detection was proposed. Based on a rock slope of Xianyang international airport in Shaanxi province, the degree of fracture and water-rich inside the slope were detected by GPR, and the slope was divided into several units with different levels. Then, the mechanical parameters such as elastic modulus, Poisson's ratio and cohesion force of different units were obtained according to the specification. Fatherly, the finite element numerical simulation software MIDAS-GTS was used to establish the grid model of the slope, and the recommended values provided by the specification were used to calculate the sliding displacement of the slope. Compared with the field displacement monitoring data, the results showed that the numerical simulation values were closer to the monitoring values, indicating that the mechanical parameters obtained by this method were more consistent with the actual value of the rock mass.

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Numerical simulation of non-cohesive homogeneous dam breaching due to overtopping considering the seepage effect

Cited by 8 publications

References 23 publications

Global Sensitivity Analysis of a Dam Breaching Model: To Which Extent Is Parameter Sensitivity Case‐Dependent?

Global Sensitivity Analysis of a Dam Breaching Model: To Which Extent Is Parameter Sensitivity Case‐Dependent?

Experimental Investigation on Failure Modes and Progressive Failure Process of Earthen Check Dam Triggered by Upstream Flow

Study on Finite Element Numerical Simulation of Rock Slope Based on Ground Penetrating Radar Detection

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