1. Water Balance for the Forgotten River Segment of the Rio Grande/Bravo Rebecca Teasley May 3, 2005 Surface Water Hydrology

2. Outline Forgotten River Basin Data Sources NARR to ArcGIS June 1981 Rainfall Comparison Conclusions

3. The Forgotten River

4. Data Sources NCDC Rain Gages IMTA Rain Gages (Mexican Institute of Technology) IBWC Stream Gages NARR Evaporation & Precipitation Data

5. Upper Basin – 8030 km 2 Lower Basin – 8550 km 2 Forgotten River Basin

6. Stream Gages El Paso Ft. Quitman Presidio

7. NCDC & IMTA Rain Gages El Paso Ft. Quitman Presidio

8. NARR to GIS Methodology Web Browser Excel Visual Basic Excel Arc Hydro Feature Class with Time Series

9. NARR to GIS http://nomads.ncdc.noaa.gov:9091/dods/

10. http://nomads.ncdc.noaa.gov:9091/dods/NCEP_NARR-A_MONTHLY_3hr

11. http://nomads.ncdc.noaa.gov:9091/dods/NCEP_NARR-A_MONTHLY_3hr/197901/19790101/

13. Change.info to.ascii?acpc[0][0][0] Returns the precipitation value at: Time 0:00Z Latitude 0.0 Longitude -220.0

14. NARR Domain Longitude: -220°E to -0.625°E [0:586] Latitude: 0°N to 89.625°N [0:240] Altitude: 1000 to 100 [0:29] Time: 00Z to 21Z01 [0:8]

15. .ascii?.apcp[0:7][77:86][301:308] Returns arrays of precipitation values over the Forgotten River for all 8 time periods in the NARR Monthly-3hr Time ArrayLatitude ArrayLongitude ArrayNARR Variable

18. NARR Grid

19. NDCD/IMTA IDW Interpolation

20. NARR Kriging Interpolation

21. Lower Basin-June 1981

22. Upper Basin – June 1981

23. Average Precipitation

24. NCDC/IMTA NARR

25. Conclusions / Future Work Conclusions –Forgotten River is an appropriate name –More analysis of NARR and rain gage data is needed to draw conclusions Future Work –Complete Monthly Water Balances for 1981

26. Acknowledgements Jon Godall Carlos Patino Dr. David Maidment My Real Estate Agent & Mortgage Broker for Helping Close on My First House Yesterday

27. Questions?