The number represents gross irrigation divided by crop water requirements. This describes how much of the crop requirements are supplied by irrigation. Therefore, the lower the number the less irrigation water-dependent is your production. However, depending on precipitation this number can either be good or bad. If you don’t irrigate sufficiently and precipitation is also not enough you might have a big water yield gap.
There are other definitions that describe irrigation efficiency and are currently being explored.
We recommend to complete assessments only for GHG for the time being until we have connected the CFT to the new climate database and the water module is up and running again.
Like the carbon tool, we do not run a crop growth model to simulate the effect of different management interventions on crop production. To understand the full effect of different management on water footprints and water use efficiency please make adjustments to yield as well using your experience or other models.
The Cool Farm Tool does not require any information on irrigation if no irrigation is applied. For rainfed agriculture, the tool will estimate water use, water footprints and water use efficiency based on precipitation only. Therefore, you will only see a green water footprint on the result page.