1. The NOAA Hydrology Program and its requirements for GOES-R Pedro J. Restrepo Senior Scientist Office of Hydrologic Development NOAA’s National Weather Service

2. Contents NOAA’s Hydrology Program –Program Description –Where is the Hydrology Program going –Observation Requirements

3. Hydrologic Time and Space Scales

4. NWS Hydrologic Service Delivery National--NCEP Major River Basin-RFC Forecast Points-WFO

5. NWS River Forecast System Analysis Historical Data Calibration (Hydrologic and Hydraulic Models) Calibration System (CS) Real-Time Observed and Forecast Data Operational Forecast System (OFS) Ensemble Streamflow Prediction (ESP) System Hydrologic and Hydraulic Models Analysis and Data Assimilation Hydrologic and Hydraulic Models short term forecasts current states Statistical Analyses Probabilistic Short term to Extended time Analysis window Interactive Forecast Program (IFP) Interactive Adjustments flow

6. Conceptual Catchment Representation Evapo- transpiration Rainfall Infiltration Soil moisture storage Groundwater storage Fast flow Percolation Slow flow Base flow Total flow

7. Hydrologic Applications of Satellite Data Multi-sensor precipitation estimates Freezing level and potential evaporation observations and forecasts Data assimilation Temperature and precipitation forecast grids for use with distributed models Land surface input variables for atmospheric and hydrologic models Snow cover and snow water equivalent

8. Hydrologic Modeling Approaches 1.Rainfall and soil properties averaged over basin 2.One rainfall/runoff model 3.Prediction at only one point 1.Rainfall and soil properties in each grid/polygon 2.Rainfall/runoff model in each grid/polygon 3.Prediction at many points 4.New forecast information such as soil moisture and evaporation LumpedDistributed (high resolution)

9. NOAA’s Hydrology Program where is it going? High-resolution distributed hydrologic modeling –High resolution observations of precipitation, temperature, snow cover, snow water equivalent, soil moisture. Hydraulic models –High resolution observations of river and reservoir/lake stage. Community Hydrologic Modeling System Mud slide models –High resolution observations of precipitation, soil moisture, land cover observations Water Resources

11. NOAA’s Water Resources Rivers & Streams Reservoirs & Lakes The Great Lakes Watershed Conditions Wetlands Estuaries Coasts “Any of the entire range of the Earth’s natural waters that are of potential use to humans”

12. NOAA’s Water Resources Themes and Objectives Socio-Economic Needs and Benefits –Multidisciplinary social science studies with demonstrations of product and service benefits Water Resource Data Assimilation –Doppler radar dual polarization and satellite quantitative precipitation, snow, satellite vegetation, soil moisture, evaporation, tides, estuary water quality Fresh Water Forecasting –High spatial resolution water resources information grids –Daily to seasonal probabilistic forecasts –Improved forecast information for extreme events (floods and droughts) Estuary-Fresh Water Ecosystem Predictions –Fresh water forecast information directly incorporated into assessments of ecosystem stress –Routine predictions of coastal water conditions

13. NOAA’s Hydrology Program Requirements

18. Thank You!

19. Gap-Filling: Radar Mosaic

20. Precipitation Field from Hydroestimator

21. Radar Mosaic filled with Hydroestimator

22. Present Hydrologic Use of GOES Data CNRFC rain gauge network shows gauge density is uneven

23. CNRFC Effective Radar Coverage

24. CNRFC Dec 17, 2002 HydroestimatorBias Cor. Hydroestimator

25. Raingage + Hydroestimator Merged

26. Bias Correction and Data Merging