The simulation of floods for warning and off line planning

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The simulation of floods for warning and off line
planning Guus Stelling April 2006

• Contents
• Examples of floods and flood protection
• Operational prediction systems and offline
  simulations for flood maps and impact assessment
• Concluding remarks

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Floods have many causes hurricanes, tropical
cyclones, dam failures, storm surges, rainstorms,
tsunamis
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Before the flood
Ice jam in front of the dike near Ochten, 24
January 1799
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The dike breach
Dike breach and flooding near Bemmel, 21 February
1799
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• Protection against floods
• Static
• Dynamic

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Zuid-Holland 1 februari 1953
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Nowcast system
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Study Area - Overview
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Cyclone Track (viewed with CP)
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Flood characteristics
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Comparison of lab experiment with numerical
simulation
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Offline impact assessment
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Cut cell grid Phuket
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Urban area
precipitation
evaporation
Channels/ River/Sea
Open water
Pumping station
sewer
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1D/2D flow model SOBEK, for water management in
rural and Urban areas
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Inundation of a Dutch polder simulated with 1D/2D
SOBEK
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Urban floods inundation of Taipei via sewers
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Concluding remarks Research aiming
at integrated and accurate flood warning
systems offline risk assessment, GIS, DEM,
accurate flood maps, setback lines, evacuation
planning, Communication via visualization!!