CROPWAT
Free
FAO's classic tool for crop water requirements and irrigation scheduling from climate and crop data.
Hydrology & Catchment AnalysisDormantIrrigationEvapotranspiration
8 tools · Topic
Evapotranspiration Calculation Tools
Whether you need FAO-56 Penman-Monteith reference ET for an irrigation schedule or actual ET from satellite data for a water balance, these packages cover it: standardised equation implementations, remote-sensing ET products and the utilities that fetch the weather data they require.
MIKE SHE
Commercial
DHI's integrated hydrological model — coupled overland, unsaturated, groundwater and channel flow.
Hydrology & Catchment AnalysisActiveGroundwater ModellingEvapotranspiration
MODIS ET (MOD16)
Gov-Public
Global actual ET from MODIS, 500m, 8-day/monthly/annual — a Penman-Monteith water-balance term, ready-made.
Data, Monitoring & ForecastingActiveEvapotranspirationRemote Sensing
MODIS LST
Gov-Public
1km daily/8-day land surface temperature from MODIS — the standard thermal input for energy-balance ET and snowmelt.
Data, Monitoring & ForecastingActiveLand Surface Temperature DataEvapotranspiration
MODIS NDVI/EVI (MOD13Q1)
Gov-Public
250m, 16-day global vegetation index composites — the standard input to crop-coefficient ET and drought indices.
Geospatial & Hydro-GISActiveVegetation Index DataEvapotranspiration
SPEI (R package)
Open Source
The reference R implementation of SPEI and SPI from the index's own authors.
Climate & Change AnalysisStableDrought AnalysisR Hydrology
SSEBop
Gov-Public
USGS operational ET at Landsat resolution — 30m actual evapotranspiration for water-rights and irrigation accounting.
Data, Monitoring & ForecastingActiveEvapotranspirationIrrigation
pyet
Open Source
Reference and potential evapotranspiration in Python — 20+ published methods, FAO-56 included, on pandas/xarray.
Hydrology & Catchment AnalysisActiveEvapotranspirationIrrigation