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Flood forecasting and
Hydrometry in France
WMO - Flood Forecasting Initiative
December 8-10, 2009
Caroline Wittwer
National Centre for Flood Forecasting
SCHAPI
WMO – Flood Forecasting Initiative,
SCHAPI/C.Wittwer, December 2009
Ministère de l'Écologie, de l'Énergie, du Développement durable et de la Mer
en charge des Technologies vertes et des Négociations sur le climat
www.developpement-durable.gouv.fr
The Flood Vigilance System (July 2006)
http://www.vigicrues.ecologie.gouv.fr
To better anticipate flood crises through regular and formatted information
To use a common decision-aid system for a graduated involvement of civil
security
To directly inform the population to help them become actor
SCHAPI/C.Wittwer,
WMO – Flood Forecasting
Initiative,
SCHAPI/Caroline
September
2009 December 2009
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Since December 2007 : meteo and hydro joint procedure
the “rainfall-flood” vigilance
The meteorological
vigilance map
The hydrological
vigilance map
Example
March 3rd, 2007 at 6 am
Example – March 3rd, 2007 at 6h
SCHAPI/C.Wittwer, WMO – Flood Forecasting Initiative, Dcember 2009
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Various tools depending on anticipation
10
days
5
days
CEP probabilities
3
days
1
days
Expertised values
12
hours
8x3h model data
Rainfall
data
EFAS
Decision-aid graphs
Vigilance
procedure
SIM-PE
Soil moisture
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SCHAPI/C.Wittwer, WMO – Flood Forecasting Initiative, Dcember 2009
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Various types of hydrological
models for Flood Forecasting
Flash Floods
models
Global GRs
rainfall/runoff
models
TELEMAC 2D
Gironde
estuary
MASCARET 1D/TR
Empirical
models
ATHYS / distributed
rainfall/runoff model
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SCHAPI/C.Wittwer, WMO – Flood Forecasting Initiative, Dcember 2009
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Our challenges
To improve the existing system
Data network (more complete and diverse)
Data assimilation in hydrologic and hydraulic models
Communication during and post crisis
Link with similar systems developed by local communities
To coordinate financial and technical programmes of
our 22 regional services
To enlarge forecasting to new areas
Real forecasting of flooded areas, link with flood directive
Forecasting on small watersheds – runoff – pluvial flooding
Integrate main urban alert systems
Develop warning systems in La Réunion island and Guyana
Use FF models for climate change scenario assessment
To enlarge our parternship
More technical work with the national engineering centres
More collaboration (spatial agency, hydropower company..)
Abroad: Europe (interreg, operational…), WMO,
SCHAPI/C.Wittwer, WMO – Flood Forecasting Initiative, December 2009
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Groundwater flood in North France
Flash flood in south of France
Thank you for your attention
Flooded estuary in Bordeaux
Major flood in Paris
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SCHAPI/C.Wittwer, WMO – Flood Forecasting Initiative, December 2009
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