Failure of dams arranged in series or in complex

Dewals, Benjamin; Erpicum, Sébastien; Detrembleur, Sylvain; Archambeau, Pierre; Pirotton, Michel

doi:10.1007/s11069-010-9600-z

Cited by 36 publications

(20 citation statements)

References 29 publications

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“…Recent studies have undertaken various forms of sensitivity analyses and uncertainty estimation to quantify the effects of uncertainty on numerical dam-breach model output (e.g. IM-PACT, 2004;Xin et al, 2008;Dewals et al, 2011;Zhong et al, 2011;Worni et al, 2012).…”

Section: Uncertainty and Equifinality In Numerical Modellingmentioning

confidence: 99%

Numerical modelling of glacial lake outburst floods using physically based dam-breach models

et al. 2015

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Abstract. The instability of moraine-dammed proglacial lakes creates the potential for catastrophic glacial lake outburst floods (GLOFs) in high-mountain regions. In this research, we use a unique combination of numerical dam-breach and two-dimensional hydrodynamic modelling, employed within a generalised likelihood uncertainty estimation (GLUE) framework, to quantify predictive uncertainty in model outputs associated with a reconstruction of the Dig Tsho failure in Nepal. Monte Carlo analysis was used to sample the model parameter space, and morphological descriptors of the moraine breach were used to evaluate model performance. Multiple breach scenarios were produced by differing parameter ensembles associated with a range of breach initiation mechanisms, including overtopping waves and mechanical failure of the dam face. The material roughness coefficient was found to exert a dominant influence over model performance. The downstream routing of scenario-specific breach hydrographs revealed significant differences in the timing and extent of inundation. A GLUE-based methodology for constructing probabilistic maps of inundation extent, flow depth, and hazard is presented and provides a useful tool for communicating uncertainty in GLOF hazard assessment.

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Section: Uncertainty and Equifinality In Numerical Modellingmentioning

confidence: 99%

Numerical modelling of glacial lake outburst floods using physically based dam-breach models

et al. 2015

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“…Thus, the initial step of hydraulic modelling considers a filled reservoir and a steady flow of water over the crest of the dam before failure. In line with Dewals et al (2011), the modelling procedure involves two steps (Table 3):…”

Section: Modelling Proceduresmentioning

confidence: 99%

Formation, breaching and flood consequences of a landslide dam near Bujumbura, Burundi

Nibigira

Havenith

Archambeau

et al. 2018

Nat. Hazards Earth Syst. Sci.

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Abstract. This paper investigates the possible formation of a landslide dam on the Kanyosha River near Bujumbura, the capital of Burundi, as well as the interplay between the breaching of this landslide dam and the flooding along the river. We present an end-to-end analysis, ranging from the origin of the landslide up to the computation of flood waves induced by the dam breaching. The study includes three main steps. First, the mass movement site was investigated with various geophysical methods that allowed us to build a general 3-D model and detailed 2-D sections of the landslide. Second, this model was used for dynamic landslide process modelling with the Universal Distinct Element Code. The results showed that a 15 m high landslide dam may form on the river. Finally, a 2-D hydraulic model was set up to find out the consequences of the breaching of the landslide dam on flooding along the river, especially in an urban area located downstream. Based on 2-D maps of maximum water depth, flow velocity and wave propagation time, the results highlight that neglecting the influence of such landslide dams leads to substantial underestimation of flood intensity in the downstream area.

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“…It provides detailed spatially distributed results throughout the floodplains (Beckers et al, 2013;Dewals et al, 2011;Ernst et al, 2010).…”

Section: Inundation Modellingmentioning

confidence: 99%

Assessing the operation rules of a reservoir system based on a detailed modelling chain

Bruwier

Erpicum

Pirotton

et al. 2015

Nat. Hazards Earth Syst. Sci.

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Abstract. According to available climate change scenarios for Belgium, drier summers and wetter winters are expected. In this study, we focus on two multi-purpose reservoirs located in the Vesdre catchment, which is part of the Meuse basin. The current operation rules of the reservoirs are first analysed. Next, the impacts of two climate change scenarios are assessed and enhanced operation rules are proposed to mitigate these impacts. For this purpose, an integrated model of the catchment was used. It includes a hydrological model, one-dimensional and two-dimensional hydraulic models of the river and its main tributaries, a model of the reservoir system and a flood damage model. Five performance indicators of the reservoir system have been defined, reflecting its ability to provide sufficient drinking water, to control floods, to produce hydropower and to reduce low-flow conditions. As shown by the results, enhanced operation rules may improve the drinking water potential and the low-flow augmentation while the existing operation rules are efficient for flood control and for hydropower production.

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Failure of dams arranged in series or in complex

Cited by 36 publications

References 29 publications

Numerical modelling of glacial lake outburst floods using physically based dam-breach models

Numerical modelling of glacial lake outburst floods using physically based dam-breach models

Formation, breaching and flood consequences of a landslide dam near Bujumbura, Burundi

Assessing the operation rules of a reservoir system based on a detailed modelling chain

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