The Cool Farm Tool Water metrics provide crop irrigation requirements
and blue and green water footprints

Water matters

With 70 percent of fresh water globally consumed by agriculture, farmers and supply chains are often called on to provide assessments of water used for crop production and ensure efficiency.

quick and easy

Water footprints can be cumbersome and data intensive. But the Cool Farm Tool water metrics enable farmers to quickly and easily account for their crops’ water needs and gain insight into better practice.

Minimal data entry, maximum output

Behind the scenes, the tool combines just a few additional user inputs with global data sets for crop, soil and climate data, to provide crop water estimates.

Irrigation optimization

Find out if you over or under irrigated. Compare water applied with estimated requirements based on global datasets. Optimal water can mean optimal yields, meaning all resources – both natural and financial – are used most efficiently.

Put the focus on what you can do

Try out management options like irrigation type and increasing soil organic matter to see how to improve water retention and make the most of each drop of water applied.

This is just the beginning

Future releases will compare crop water footprints to water scarcity/availability in the region, include more crops and more management options to consider, and provide calculations to inform water catchment policies.

Data Inputs

  • Click on a map to record latitude and longitude
  • Enter irrigation applied added to compare with crop irrigation need
  • Planting/harvesting timeframes
  • Soil moisture at planting (dry, medium, wet)
  • How irrigation events are spread throughout growing season

Measure and reduce your water footprint with the CFT:

Create an account
The Cool Farm Tool Water employs the FAO56 standard, published by the Food and Agricultural Organization of the United Nations (1998). The method follows three steps:
(I) Determining atmospheric forcing defined as evapo-transpiration of a short, well watered grass. This is done using an adjusted form of the Penman-Monteith equation.
(II) Scaling the reference evapotranspiration with a crop factor that is dependent on crop.
(III) Adjusting the crop factor for local climate and soil conditions as well as determining water stress based on soil water availability.

The Cool Farm Tool Water advances FAO56 by improving the simulation of soil water dynamics (e.g. including runoff, interception, the
effect of organic matter). All three steps are included in Cool Farm Tool Water and linked to global datasets for climate (ERA Interim), soil (Harmonized World Soil Database and FAO56) and crops (FAO56).

The tool can currently represent farm management by simulating different crops, different irrigation methods and accounting for different soil properties as soil organic matter as well as texture.

For the technical description of the water metric, please contact us @