Wallingford - May 2002 Flood propagation - UCL experiments 1 Flood propagation Dam-break flow...
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Wallingford - Ma y 2002 Flood propagation - UCL e xperiments 1 Flood propagation Flood propagation Dam-break flow experiments in Dam-break flow experiments in idealised representation of idealised representation of complex topography and urban area complex topography and urban area Université catholique de Louvain Sandra Soares Frazão, Nicolas le Grelle and Yves Zech
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Transcript of Wallingford - May 2002 Flood propagation - UCL experiments 1 Flood propagation Dam-break flow...
Wallingford - May 2002
Flood propagation - UCL experiments
1
Flood propagationFlood propagationDam-break flow experiments in idealised Dam-break flow experiments in idealised
representation of complex topography and representation of complex topography and urban areaurban area
Université catholique de Louvain
Sandra Soares Frazão, Nicolas le Grelle and Yves Zech
Wallingford - May 2002
Flood propagation - UCL experiments
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OverviewOverview
• Work plan within “Flood propagation” Work plan within “Flood propagation” themetheme
• Numerical modelling• Idealised dam-break flow experiments
– In complex topographies– In urban area
• Perspectives
Wallingford - May 2002
Flood propagation - UCL experiments
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Work plan
• Experiments in idealised situations– Complex topographies – Urban area
• Numerical modelling– Benchmarks– Case studies
Wallingford - May 2002
Flood propagation - UCL experiments
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OverviewOverview
• Work plan within “Flood propagation” theme
• Numerical modellingNumerical modelling• Idealised dam-break flow experiments
– In complex topographies– In urban area
• Perspectives
Wallingford - May 2002
Flood propagation - UCL experiments
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Numerical modellingNumerical modelling
• Finite-volume formulation of the shallow-water equations
• Evaluation of fluxes by Roe scheme
Wallingford - May 2002
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OverviewOverview
• Work plan within “Flood propagation” theme
• Numerical modelling• Idealised dam-break flow experimentsIdealised dam-break flow experiments
– In complex topographiesIn complex topographies– In urban area
• Perspectives
Wallingford - May 2002
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Dam-break flow experimentsDam-break flow experiments
• Complex topographies– Dams built in mountainous areas
• steep, dry slopes• abrupt banks
– Arrival in large plains• great extent of small water depth
Wallingford - May 2002
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The bump test caseThe bump test case
• CADAM test case by ULB/LRH Châtelet, March 1998
• Additional laboratory measurements at UCL using digital imaging, March 2001
• More experiments for IMPACT ?
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• Experimental set-up
Reservoirh0 = 0.75 m
Gate
Downstreamh = 0.15 m
The bump test caseThe bump test case
LRHChâtelet
Wallingford - May 2002
Flood propagation - UCL experiments
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The bump test caseThe bump test case
LRHChâtelet
Wallingford - May 2002
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• Numerical result
The bump test caseThe bump test case
x (m)
z (m)
Wallingford - May 2002
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• Comparison with UCL measurements
The bump test caseThe bump test case
z (m)
x (m)
Wallingford - May 2002
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Secondary damSecondary dam
UCL
Wallingford - May 2002
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OverviewOverview
• Work plan within “Flood propagation” theme
• Numerical modelling• Idealised dam-break flow experimentsIdealised dam-break flow experiments
– In complex topographies– In urban areaIn urban area
• Perspectives
Wallingford - May 2002
Flood propagation - UCL experiments
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Dam-break flow experimentsDam-break flow experiments
• Urban areas– Kind of complex topography
• Streets, buildings, houses• Complex flow route
– Dam-break wave impact against buildings
– Important velocities• Worsened rescue conditions
Wallingford - May 2002
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The building test caseThe building test case
• Configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 2
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Preliminary experiments : configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Preliminary experiments : configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Preliminary experiments : configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Preliminary experiments : configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Preliminary experiments : configuration 1
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Foreseen measurements– Water-level– Surface-velocity by digital imaging– Pressure forces against building
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 1 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 1 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 1 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 2 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 2 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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The building test caseThe building test case
• Configuration 2 - Numerical simulation
Wallingford - May 2002
Flood propagation - UCL experiments
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OverviewOverview
• Work plan within “Flood propagation” theme
• Numerical modelling• Idealised dam-break flow experiments
– In complex topographies– In urban area
• PerspectivesPerspectives
Wallingford - May 2002
Flood propagation - UCL experiments
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PerspectivesPerspectives
• Adverse slopes and local sills– New experiments– Improve source term treatment
• Urban obstacles– Experiments with various
configurations– Local influence– Influence on the far field
