Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Skip to content

Actual to reference evapotranspiration (AET/RET) ratios for several land-cover types in east-central Florida

Metadata Updated: October 28, 2023

File AET2RET_Ratios.csv lists the AET to RET (actual to reference evapotranspiration) ratios, or AET/RET, used to calculate actual evapotranspiration for each land cover type. The daily measured AET data collected at the ET stations were used to calculate the monthly totals for each month of the year. These monthly AET totals were then used to calculate the average AET/RET monthly ratios for the land cover of the ET station by dividing the AET rates by the RET rates obtained from the Florida ET network (; USGS, 2016). The land cover types represented in these data are forest, grass, marsh, open water, ridge, urban, and agriculture. The AET/RET ratios for these land cover types were presented in O’Reilly, 2007; Sumner and others, 2017; Sumner, 2017; and U.S. Geological Survey, 2017. These ratios are used as an extrapolation of AET rates for all months in the entire 2000-2016 period of record, not just the months when the ET stations were in operation. Land-cover based types were obtained from a generalized land use map provided by the Florida Geological Survey ( ). Average monthly AET/RET rates for the period of record were calculated from measured AET data from the ET stations listed in file AET_Monthly_Totals.csv. These references were used in the generation of the AET/RET ratios for the land cover types in east-central Florida: O’Reilly, A.M., 2007, Effects of the temporal variability of evapotranspiration on hydrologic simulation in central Florida: U.S. Geological Survey Scientific Investigations Report 2007–5100, 36 p. Sumner, D.M., Hinkle, C.R. and Becker, K.E., 2017, Evapotranspiration (ET) at University of Central Florida urban site, daily data, Orange County, Florida, January 29, 2009–September 27, 2012: U.S. Geological Survey data release, accessed September 20, 2017, at Sumner, D.M., 2017, Evapotranspiration (ET) at Tiger Bay State Forest site, Volusia County, Florida, January 1, 1998–December 31, 1999: U.S. Geological Survey data release, accessed September 20, 2017, at U.S. Geological Survey, 2016, Evapotranspiration information and data: Caribbean-Florida Water Science Center website, accessed June 29, 2016, at U.S. Geological Survey, 2017, National Water Information System—Web interface: Accessed September 20, 2017, at

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

Downloads & Resources


Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 28, 2023
Publisher U.S. Geological Survey
Identifier USGS:5baa8d43e4b08583a5cd8713
Data Last Modified 20200812
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id b842ac7e-84a6-4737-a717-591ac77e80a8
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -82.2986,27.6446,-80.7605,30.2116
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 9ef028f2201ba12d40ea9513d626bad2fb374b42d49fc32e2eca3a3c31f2e3e0
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -82.2986, 27.6446, -82.2986, 30.2116, -80.7605, 30.2116, -80.7605, 27.6446, -82.2986, 27.6446}

Didn't find what you're looking for? Suggest a dataset here.