Home About HyMeX
Motivations
Science questions
Observation strategy
Modelling strategy
Target areas
Key documents
Organisation
International coordination
Working groups
Task teams
National contributions
Endorsements
Resources
Database
Data policy
Publications
Education and summer schools
Drifting balloons (BAMED)
SOP web page
Google maps data visualisation
Workshops Projects
ASICS-MED
MOBICLIMEX
MUSIC
IODA-MED
REMEMBER
FLOODSCALE
EXAEDRE
Offers Links Contacts
Science & Task teams
Science teams
Task teams
Implementation plan
Coordination
International Scientific Steering Committee (ISSC)
Executive Committee for Implementation and Science Coordination (EC-ISC)
Executive Committee - France (EC-Fr)
HyMeX France
HyMeX Italy
HyMeX Spain
Archive

The Bollène-2002 experiment: evaluation of processing strategies for radar QPE in the Cévennes-Vivarais region


Boudevillain (1) Brice

The Bollène 2002 experiment was designed with Météo-France to test the relevance of a volume-scanning strategy for both hydrological and meteorological applications of weather radar in the Cévennes-Vivarais region, a mountainous region in Southern France prone to intense rain events. The Bollène S-band weather radar belonging to the French ARAMIS radar network was used for this purpose.
Innovative algorithms are developed including: (1) the long-term testing of the transmitter-receiver stability using ground clutter, (2) a dynamical ground clutter identification technique based on the pulse-to-pulse reflectivity variability, (2) a coupled procedure to determine both an automatic separation between convective and stratiform regions and vertical profiles of reflectivity (VPR) conditional on rain types, and (3) a procedure based on a hydrological criterion for estimating rain rates at ground level as a combination of reflectivity measurements at the various elevation angles. The use of Z-R relationships conditional on rain types is also considered.
Several radar data processing strategies based both on static and adaptative algorithms are implemented and co-evaluated with respect to rainfall products derived from the OHM-CV rain gauge networks. The performance and merits (robustness versus accuracy) of the different strategies are detailed for a set of five intense and/or long lasting rain events with contrasted spatial structures.