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Data Infrastructure for Wide-Area Hydrologic Modeling. Greg Husak and Guleid Artan. Potential Evapo-Transpiration (PET). Computed daily from Global Data Assimulation System (GDAS) data (generated every 6hrs) Penman Monteith Equation solved to obtain PET values Spatial domain: Global - PowerPoint PPT Presentation
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Data Infrastructure for Wide-Area Hydrologic Modeling
Greg Husak and Guleid Artan
Potential Evapo-Transpiration (PET) Computed daily from Global Data Assimulation System
(GDAS) data (generated every 6hrs) Penman Monteith Equation solved to obtain PET values Spatial domain: Global Spatial Resolution: 100 km grids (1o) Data Availability:
ftp://edcftp.cr.usgs.gov/pub/edcuser/fewsips
Global PET for 2004
ftp://edcftp.cr.usgs.gov/pub/edcuser/fewsips/
Cuyama (88): 2004 ETo Comparison GDAS vs Station (moving 8-day average)
Elevation (m): GDAS/Station, 567/698
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Julian days, 2004
Daily E
To
(m
m) GDAS
Station
Annual Difference GDAS - Station = -72 mm (-5%)
r = 0.99
Riverside (44): 2004 ETo Comparison GDAS vs Station (moving 8-day average) Elevation (m): GDAS/Station, 1160/311
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Julian days, 2004
Daily
ET
o (
mm
) GDAS
Station
Annual Difference GDAS - Station = 36 mm (2.4%)
r = 0.99
Daily NOAA RFE Data Windows
ftp://edcftp.cr.usgs.gov/pub/edcuser/fewsips/
Air Force Weather Agency Data Windows (AFWA / NCAR / PSU MM5 Model )
ftp://edcftp.cr.usgs.gov/pub/edcuser/fewsips/
HYDRO1K Elevation Derivative Dataset
http://edc.usgs.gov/products/elevation/gtopo30/hydro/index.html
USGS Global Land Cover
Characterization Dataset
http://edcsns17.cr.usgs.gov/glcc/
GeoSFM Database ComponentsStatic Geographic
Database
FAO Soil Data
Land Use/ Land Cover
Elevation Data
• Subbasins are the modeling units for water balance and routing
• Uniform naming convention used to identify rain and PET grids
• Dams and gauges identified by unique id as well as subbasin id
Vector Datasuch as rivers, basins,gauges…
Dynamic Geographic Database
GriddedRainfall
PET Fields
GriddedQPF
Relational Database of Time
Series
1D time series of rainfall, PET, soil water, runoff and flow
Continental Flood Risk Monitoring
Improved Model Precipitation
• Integrating available station data with satellite model could yield improved rainfall estimates at daily or sub-daily timesteps
• Preliminary work suggests good improvements at monthly and dekadal timesteps
• Improved precipitation inputs could lead to improved flood models
Improved Rainfall at Watershed Level
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