An inverse method to estimate the flow through a levee breach

D’Oria, Marco; Mignosa, Paolo; Tanda, Maria Giovanna

doi:10.1016/j.advwatres.2015.05.002

Cited by 15 publications

(13 citation statements)

References 22 publications

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“…In fact, downstream of the breach location, the discharge may reduce or even fall to zero and reverse, but the water depth does not necessarily reduce accordingly. Hydraulic gradient and inertia can play a significant role, and the stage-discharge relationships at downstream sections may be characterized by a strong loop effect (D'Oria et al, 2015). This leads to the suggestion that, if a single-valued rating curve is imposed as outflow boundary condition, it should be assigned at the farthest possible section downstream from the breach location (even if some criteria concerning the optimal location of a downstream unique rating curve were studied; e.g.…”

Section: Upstream and Downstream Boundary Conditionsmentioning

confidence: 99%

“…Moreover, the middle-lower basin of the Po River was subject to levee-breach-induced floods several times in the last 150 years, either from the main river levees or from its leveed tributaries (e.g. Di Baldas-sarre et al, 2009;Masoero et al, 2013;D'Oria et al, 2015;Dazzi et al, 2019), often with devastating consequences. Finally, the Secchia and Panaro rivers experienced levee-breach events in the past, even without overtopping and during the occurrence of floods with low-medium return periods.…”

Section: Application Of the Resilience Project To A Pilot Area In Normentioning

confidence: 99%

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Enhancing the resilience to flooding induced by levee breaches in lowland areas: a methodology based on numerical modelling

Ferrari

Dazzi

Vacondio

et al. 2020

Nat. Hazards Earth Syst. Sci.

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Abstract. With the aim of improving resilience to flooding and increasing preparedness to face levee-breach-induced inundations, this paper presents a methodology for creating a wide database of numerically simulated flooding scenarios due to embankment failures, applicable to any lowland area protected by river levees. The analysis of the detailed spatial and temporal flood data obtained from these hypothetical scenarios is expected to contribute both to the development of civil protection planning and to immediate actions during a possible future flood event (comparable to one of the available simulations in the database) for which real-time modelling may not be feasible. The most relevant criteria concerning the choice of mathematical model, grid resolution, hydrological conditions, breach parameters and locations are discussed in detail. The proposed methodology, named RESILIENCE, is applied to a 1100 km2 pilot area in northern Italy. The creation of a wide database for the study area is made possible thanks to the adoption of a GPU-accelerated shallow-water numerical model which guarantees remarkable computational efficiency (ratios of physical to computational time up to 80) even for high-resolution meshes (2.5–5 m) and very large domains (>1000 km2).

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Section: Upstream and Downstream Boundary Conditionsmentioning

confidence: 99%

Section: Application Of the Resilience Project To A Pilot Area In Normentioning

confidence: 99%

Enhancing the resilience to flooding induced by levee breaches in lowland areas: a methodology based on numerical modelling

Ferrari

Dazzi

Vacondio

et al. 2020

Nat. Hazards Earth Syst. Sci.

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“…It allows flood parameters to be obtained with a high level of accuracy and detail [34,35]. Levee breach simulation with HEC-RAS was undertaken in numerous studies [15,28,36]. The flow through the breach is calculated using a broad-crested weir equation (same as used in the presented module) [34].…”

Section: Synthetic Test Descriptionmentioning

confidence: 99%

Levee Breaching: A New Extension to the LISFLOOD-FP Model

Shustikova

Neal

Domeneghetti

et al. 2020

Water

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Levee failures due to floods often cause considerable economic damage and life losses in inundated dike-protected areas, and significantly change flood hazard upstream and downstream the breach location during the event. We present a new extension for the LISFLOOD-FP hydrodynamic model which allows levee breaching along embankments in fully two-dimensional (2D) mode. Our extension allows for breach simulations in 2D structured grid hydrodynamic models at different scales and for different hydraulic loads in a computationally efficient manner. A series of tests performed on synthetic and historic events of different scale and magnitude show that the breaching module is numerically stable and reliable. We simulated breaches on synthetic terrain using unsteady flow as an upstream boundary condition and compared the outcomes with an identical setup of a full-momentum 2D solver. The synthetic tests showed that differences in the maximum flow through the breach between the two models were less than 1%, while for a small-scale flood event on the Secchia River (Italy), it was underestimated by 7% compared to a reference study. A large scale extreme event simulation on the Po River (Italy) resulted in 83% accuracy (critical success index).

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“…Moreover, the middle-lower basin of the Po River was subject 20 to levee breach-induced floods several times in the last 150 years, either from the main river levees or from its leveed tributaries (e.g. Di Baldassarre et al, 2009;Masoero et al, 2013;D'Oria et al, 2015;Dazzi et al, 2019), often with devastating consequences. The Secchia and Panaro rivers experienced levee breach events in the past, even without overtopping and during the occurrence of floods with low/medium return periods.…”

Section: Flooding Scenarios Induced By Levee Breaches: the Resiliencementioning

confidence: 99%

A methodology based on numerical models for enhancing the resilience to flooding induced by levee breaches in lowland areas

Ferrari

Dazzi

Vacondio

et al. 2019

Preprint

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Abstract. With the aim of improving resilience to flooding and increasing preparedness to face levee breach-induced inundations, this paper presents a methodology to create a wide database of numerically simulated flooding scenarios due to embankment failures, applicable to any lowland area protected by river levees. The analysis of the detailed spatial and temporal flood data obtained from these hypothetical scenarios is expected to contribute both to the development of civil protection planning, and to immediate action during a possible future flood event (comparable to one of the available simulations in the database), for which a real-time simulation may not be feasible. The most relevant criteria concerning the choice of the mathematical model, the grid resolution, the hydrological conditions, the breach parameters and locations are discussed in detail. Results of the application of the proposed methodology to a 1,100 km2-pilot area in Northern Italy are presented. The creation of a wide database for the study area is made possible thanks to the adoption of a GPU-accelerated shallow water numerical model, which guarantees a great computational efficiency (ratios of physical to computational time up to 80) even for high-resolution meshes (2.5–5 m) and large domains.

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An inverse method to estimate the flow through a levee breach

Cited by 15 publications

References 22 publications

Enhancing the resilience to flooding induced by levee breaches in lowland areas: a methodology based on numerical modelling

Enhancing the resilience to flooding induced by levee breaches in lowland areas: a methodology based on numerical modelling

Levee Breaching: A New Extension to the LISFLOOD-FP Model

A methodology based on numerical models for enhancing the resilience to flooding induced by levee breaches in lowland areas

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