WAPOR Dekadal Reference Evapotranspiration 2.0

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agriculture fao wapor water


Reference evapotranspiration (RET) is defined as the evapotranspiration from a hypothetical reference crop and it simulates the behaviour of a well-watered grass surface. The value of each pixel represents the average of the daily reference evapotranspiration for that specific dekad.


18924 meters


Name Units Scale Description
L1_RET_D mm 0.1

Reference Evapotranspiration (Dekadal) [mm]

Terms of Use

Terms of Use

The Food and Agriculture Organization of the United Nations (FAO) is mandated to collect, analyze, interpret, and disseminate information related to nutrition, food, and agriculture. In this regard, it publishes a number of databases on topics related to FAO's mandate, and encourages the use of them for scientific and research purposes. Consistent with the principles of openness and sharing envisioned under the Open Data Licensing For Statistical Databases, and consistent with the mandate of FAO, data from the Water Productivity Open Access Portal (WaPOR), as part of AQUASTAT - FAO's Global Information System on Water and Agriculture, is available free to the user community.


  • FAO 2018. WaPOR Database Methodology: Level 1. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO. 72 pages.

  • FAO 2020. WaPOR V2 Database Methodology. Remote Sensing for Water Productivity Technical Report: Methodology Series. Rome, FAO.https://www.fao.org/3/ca9894en/CA9894EN.pdf

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Code Editor (JavaScript)

var coll = ee.ImageCollection('FAO/WAPOR/2/L1_RET_D');
var image = coll.first();
Map.setCenter(17.5, 20, 3);
Map.addLayer(image, {min: 0, max: 100});
Open in Code Editor