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Rainfall and Potential Evapotranspiration Data for Everglades Depth Estimation Network (EDEN) Gages
July 2009
evergladesdepthestimationnetwork
Pamela Telis1, Heather Henkel2, Bryan McCloskey2, and Michael Holmes3
U.S. Department of the InteriorU.S. Geological Survey
Contact Information:1USGS, Florida Integrated Science Center, Jacksonville, FL, [email protected] Florida Integrated Science Center-St. Petersburg, FL, [email protected], [email protected] Florida Integrated Science Center-Tampa, FL, [email protected]
1 U.S. Geological Survey, Florida Integrated Science Center, Jacksonville, FL2 U.S. Geological Survey, Florida Integrated Science Center, St. Petersburg, FL3 U.S. Geological Survey, Florida Integrated Science Center, Tampa, FL
The Everglades Depth Estimation Network (EDEN) is a network of real-time water-level stations, ground-elevation models, and water-surface models that provides scientists and manag-ers with current (2000 to present) on-line water-elevation and water-depth information for the entire freshwater portion of the greater Everglades. Recently, EDEN compiled rainfall and potential evapotranspiration data and assembled the data for each EDEN station, over 200 locations, throughout the Everglades. These meteorological data sets offer users easy access to data for biological and ecological assessments, and watershed modeling and management. The meteorological data are available on the EDEN website, http://sofia.usgs.gov/eden.
Rainfall Data Potential Evapotranspiration DataEvapotranspiration (ET) is a term used to describe the sum of evaporation and plant transpiration from the Earth's land surface to atmosphere. Potential evapotranspiration (PET) is the evapotrans-piration rate of a surface without moisture stress, a condition that is generally met in the wetlands of the Everglades.
The PET data for the Everglades was computed by the Priestly-Taylor equation based on solar radiation estimates derived from data from Geostationary Operational Environmental Satellites (GOES) and meteorological data from the Florida Automated Weather Network, the State of Florida Water Management Dis-tricts and the National Oceanographic and Atmospheric Adminis-tration. Daily PET data is available throughout the State of Florida for the period 1995 to 2008 at the same 2-kilometer grid as the rainfall data and is processed annually. Daily PET values are assigned for each of the EDEN water-level stations and assembled into Excel spreadsheets organized by area.
For more information about the estimated ET data from the USGS and others, download the report "Satellite-based Solar Radiation, Net Ra-diation and Potential and Reference Evapotranspiration Estimates Over Florida." (Available at http://hdwp.er.usgs.gov/ET/GOES_FinalReport.pdf.) PET and RET data is also available for download by county; please visit the USGS Hydrologic Data Portal at http://hdwp.er.usgs.gov/.
The rainfall data for the Everglades is based on the Next Generation Radar (NEXRAD) data from the U.S. National Weather Service cover-age of rainfall statewide in Florida. The coverage for the Everglades in-cludes rainfall amounts for 15-minute intervals for the period January 1, 2002 to present for a 2 km by 2 km grid resolution. The accuracy of the ‘near real time’ 15-minute NEXRAD data is enhanced when adjusted using the local rain-gage data and a proprietary algorithm based on the Brandes method. The precision for the gage-adjusted radar data is con-sidered to be the same as standard rain-gage precision which is typically reported to the nearest 1/100th of an inch.
EDEN receives rainfall data for the EDEN domain gridded to 2 kilome-ters, and new data is processed annually with data available starting in 2002. Daily rainfall values are extrapolated by location for each of the EDEN water-level stations and assembled into Excel spreadsheets orga-nized by area.
Daily gage-adjusted rainfall values were computed for the South Florida Water Manage-ment District by OneRain, Inc (http://www.onerain.com) from January 2002 to October 2007. Starting November 1, 2007, these data are provided by Vieux. Inc (http://www.vieuxinc.com/rainviuex.html). For more information about the rainfall data from the SFWMD, view the 2008 South Florida Environmental Report Volume I available at http://my.sfwmd.gov/SFER. Please note: Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
References:• Brandes, E.A. (1975). “Optimizing Rainfall Estimates with the Aid of Radar.” J. of Applied Meteorology, 14(7): 1339 – 1345.• Huebner, R.S., C.S. Pathak and B.C. Hoblit. 2003. Development and Use of a NEXRAD Database for Water Management in South Florida. ASCE World Water & Environmental Resources Congress. June 23-26, 2003. Philadelphia, Pennsylvania.• Skinner, C. 2006. Developing A Relationship Between NEXRAD Generated Rainfall Values and Rain Gauges in South Florida. Master's Thesis. Department of Civil Engineering. Florida Atlantic University, Boca Raton, Florida.• Skinner, C., F. Bloetscher, C.S. Pathak. 2008. Comparison of NEXRAD and Rain Gauge Precipitation Mea-surements in South Florida. Journal of Hydrologic Engineering. In Press.
WCA 1
WCA 2
WCA 3A
WCA 3B
Big CypressNational Preserve
EvergladesNational
Park
EDEN Boundary Area
Water Conservation Areas (WCA) and National Park Service areas
EDEN Stations
EDEN Modeled Water Surface
Select EDEN Stations#*
RG1
Site 65
3ANE
#*
#*
#*
Station 3ANE
Modeled water elevation, water depth, rainfall, and evapotranspiration data at water-level gages in the Everglades can be downloaded directly from the EDEN website. This gives scientists and managers a more complete picture for biological and ecological assessments. In addition, EDEN provides a suite of tools to view, extract, plot, and manipulate the data in a variety of ways. Please see the adjacent poster for more information on these tools.
Station Site 65
Map showing location of EDEN boundary and gages. Three of these gages have been selected to show water level, water depth, rainfall, and ET data in various locations throughout the EDEN network.
Station RG1
0.0
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Evapotranspiration for station 3ANE, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
05
1015
2025
Rainfall for station 3ANE, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
220
240
260
280
300
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360
Water Level and Water Depth for station 3ANE, 2008
Date
Wat
er le
vel (
cm)
abov
e N
AV
D88
Jan Mar May Jul Sep Nov Jan
Average groundelevation at gage
−40
−20
0
20
40
60
80
100
Wat
er d
epth
(cm
)
0.0
0.1
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0.7
Evapotranspiration for station SITE 65, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
05
1015
2025
Rainfall for station SITE 65, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
180
200
220
240
260
280
300
Water Level and Water Depth for station SITE 65, 2008
Date
Wat
er le
vel (
cm)
abov
e N
AV
D88
Jan Mar May Jul Sep Nov Jan
Average groundelevation at gage
0
20
40
60
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100
120
Wat
er d
epth
(cm
)
0.0
0.1
0.2
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0.5
0.6
0.7
Evapotranspiration for station RG1, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
05
1015
2025
Rainfall for station RG1, 2008
Date
cm
Jan Mar May Jul Sep Nov Jan
40
60
80
100
120
140
160
Water Level and Water Depth for station RG1, 2008
Date
Wat
er le
vel (
cm)
abov
e N
AV
D88
Jan Mar May Jul Sep Nov Jan
Average groundelevation at gage
−80
−60
−40
−20
0
20
40
Wat
er d
epth
(cm
)
Note: scale has been exagerated in order to show trend in ET data.
Note: scale has been exagerated in order to show trend in ET data.
Note: scale has been exagerated in order to show trend in ET data.
