Aaron Boone WATER-HM SWG Meeting, Oct. 29-30, Washington, DC. Potential research and operational hydrology applications of WATER-HM at Météo-France.

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Presentation transcript:

Aaron Boone WATER-HM SWG Meeting, Oct , Washington, DC. Potential research and operational hydrology applications of WATER-HM at Météo-France

2 I) Need to evaluate river routing and floodplain parameterizations for use in GCMs and regional scale modeling: Used to study possible global climate change impacts on flood risk/frequency Long term impact on lake storage: possible aid to water resource planning (seasonal and long term) Better description of lake changes at high latitudes: links with freeze thaw, greenhouse gas release NEED river depth, floodplain depth/extent, river velocity: WATER-HM probably adequate! *End Result: Better river discharge/routing, lake parameterizations to be utilized within fully- coupled OGCM model (complete description of water cycle) II) Operational Hydrological Forecasting: Real-time monitoring of the water resources at the national level (France): SAFRAN-ISBA- MODCOU distributed hydrological modeling system Ensemble streamflow forecast studies: initialized using current river heights: potential flood risk forcasted NEED high spatial resolution (100m probably not fine enough?) and daily (?) observations Potential uses in developing countries with relatively low spatial density observational discharge/river monitoring networks (eg. Western Africa)

3 A new river flooding scheme for global climate and hydrological applications ISBA TRIP The ISBA-TRIP coupling system Prognostic variables: The river height, h s The river flow velocity, v (Manning formula) The floodplain volume (calculated using the sub-grid topography) (Decharme et al., 2007, JGR, submitted) Other important variables: The flood fraction, f flood The flood height, h f Evaluations: In-situ river discharge Satellite-derived wetland estimates (Prigent et al., JGR, 2007) WATER-HM derived v, depths, floodplain water depth…

4 Satellite-derived wetland estimates from Prigent et al. (2007, JGR). % ISBA-TRIP floodplain simulation Difference Spatial comparison between the Flood experiment and the Satellite-derived wetland estimates A new river flooding scheme for global climate and hydrological applications

5 Assesment of a 10-year application of SIM-France Comparison of the daily riverflow Spatial repartition of the discharge error: Two kinds of Ensemble streamflow were tested: Long term : 10-day forecast, using ECMWF EPF (50 members + ctrl) Rousset et al., ECMWF Newsletter 2007 Short term: 2-day forecast, using PEARP EPF (10 members + ctrl) Thiriel et al., submitted 2007 *The SIM real-time application is used to initialize the ensemble streamflow forecast: could be improved using real-time WATER-HM Real-time monitoring of the water resources at the national scale Ensemble streamflow forecast studies The SAFRAN-ISBA-MODCOU (SIM) hydrometeorological model applied over France Habets, Boone, Champeaux, Etchevers, Franchistéguy, Leblois, Ledoux, Le Moigne, Martin, Morel, Noilhan, Quintana- Segui, Rousset, Viennot