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

Bruwier, Martin; Erpicum, Sébastien; Pirotton, Michel; Archambeau, Pierre; Dewals, Benjamin

doi:10.5194/nhess-15-365-2015

Cited by 25 publications

(21 citation statements)

References 44 publications

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“…As detailed in Arrault et al (2016) and Bruwier et al (2017a, b), the model was successfully validated against fine scale computations and against experimental data for flow conditions similar to those prevailing here. The model is part of the academic code Wolf2D which was used in multiple flood risk studies (Ernst et al 2010, Beckers et al 2013, Bruwier et al 2015).…”

Section: Model Descriptionmentioning

confidence: 99%

Influence of urban pattern on inundation flow in floodplains of lowland rivers

Bruwier

Mustafà

Aliaga³

et al. 2018

Science of The Total Environment

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The objective of this paper is to investigate the respective influence of various urban pattern characteristics on inundation flow. A set of 2000 synthetic urban patterns were generated using an urban procedural model providing locations and shapes of streets and buildings over a square domain of 1×1km. Steady two-dimensional hydraulic computations were performed over the 2000 urban patterns with identical hydraulic boundary conditions. To run such a large amount of simulations, the computational efficiency of the hydraulic model was improved by using an anisotropic porosity model. This model computes on relatively coarse computational cells, but preserves information from the detailed topographic data through porosity parameters. Relationships between urban characteristics and the computed inundation water depths have been based on multiple linear regressions. Finally, a simple mechanistic model based on two district-scale porosity parameters, combining several urban characteristics, is shown to capture satisfactorily the influence of urban characteristics on inundation water depths. The findings of this study give guidelines for more flood-resilient urban planning.

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Section: Model Descriptionmentioning

confidence: 99%

Influence of urban pattern on inundation flow in floodplains of lowland rivers

Bruwier

Mustafà

Aliaga³

et al. 2018

Science of The Total Environment

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“…This model has been developed by the research group HECE of the University of Liege (Belgium). It solves the fully dynamic shallowwater equations on multiblock Cartesian grids and a twolength scale k −ε turbulence model is used to account for the anisotropic turbulent mixing induced by the lateral shear and by the bottom-generated turbulence (Camnasio et al, 2014;Erpicum et al, 2009). The numerical discretization is based on a conservative finite volume scheme and a self-developed flux vector splitting (Dewals et al, 2008;Erpicum et al, 2010b).…”

Section: Numerical Modelmentioning

confidence: 99%

Hydrodynamics of long-duration urban floods: experiments and numerical modelling

Arrault

Finaud-Guyot

Archambeau

et al. 2016

Nat. Hazards Earth Syst. Sci.

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Abstract. Flood risk in urbanized areas raises increasing concerns as a result of demographic and climate changes. Hydraulic modelling is a key component of urban flood risk analysis; yet, detailed validation data are still lacking for comprehensively validating hydraulic modelling of inundation flow in urbanized floodplains. In this study, we present an experimental model of inundation flow in a typical European urban district and we compare the experimental observations with predictions by a 2-D shallow-water numerical model. The experimental set-up is 5 m  ×  5 m and involves seven streets in each direction, leading to 49 intersections. For a wide range of inflow discharges, the partition of the measured outflow discharges at the different street outlets was found to remain virtually constant. The observations also suggest that the street widths have a significant influence on the discharge partition between the different streets' outlets. The profiles of water depths along the streets are mainly influenced by the complex flow processes at the intersections, while bottom roughness plays a small part. The numerical model reproduces most of the observed flow features satisfactorily. Using a turbulence model was shown to modify the length of the recirculations in the streets, but not to alter significantly the discharge partition. The main limitation of the numerical model results from the Cartesian grid used, which can be overcome by using a porosity-based formulation of the shallow-water equations. The upscaling of the experimental observations to the field is also discussed.

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“…This model has been extensively validated and applied for simulating flow induced by dam and dike breaching Roger et al, 2009) as well as for conducting flood risk analysis (Arrault et al, 2016;Beckers et al, 2013;Bruwier et al, 2015;Detrembleur et al, 2015;Ernst et al, 2010).…”

Section: Hydraulic Modellingmentioning

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

Cited by 25 publications

References 44 publications

Influence of urban pattern on inundation flow in floodplains of lowland rivers

Influence of urban pattern on inundation flow in floodplains of lowland rivers

Hydrodynamics of long-duration urban floods: experiments and numerical modelling

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

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