1. 1 A case-study of Continental Water dynamics in the Guadalupe and San Antonio River Basins Cédric David University of Texas at Austin

2. 2 Continental Water Dynamics Atmospheric Data (NARR+NEXRAD) Stream and River Flow Model Land Surface - Atmosphere Model (NOAH)

3. 3 Last time we met RAPID coupled with SIM- France (atmospheric, land surface, groundwater model) 24,264 river reaches 10-year simulation Streamflow Dam influence Bi-directional river/aquifer exchanges Operational at MeteoFrance cf. David and Habets (2009?), second manuscript in preparation

4. Transition to supercomputers 4 Desktop computer Lonestar

5. Transition to NHDPlus 5 Grid cell network of SIM-France Best available (1 km resolution) GIS Mapped rivers GIS-based river networks offer much better information than gridded networks

6. 6 Catchment shape file converted to a 900m grid of catchments Coupling with Noah-UT (1)

7. Comid 1659595 1638214 … Inflow1 2.4 1.3 … Inflow 2 1.9 1.0 … … Map of catchments Runoff map Runoff is spatially averaged for catchments surrounding NHDPlus flow lines Coupling with Noah-UT (2)

8. Determination of wave celerities 15 min flow data

9. Cross lagged correlation

10. Results 10

11. Some statistics about results 11

12. Current work on Texas Gulf 12 68,143 river reaches 711 flow gages

13. Conclusions Adaptation of RAPID on the Lonestar supercomputer Adaptation of RAPID to the NHDPlus framework Coupling of RAPID with Noah-UT Investigation of wave celerity Run RAPID over Guadalupe and San Antonio River Basins –Missing water in Victoria? –Need to fix time shift 13

14. 14 Thank you! Questions?