Effective Rainfall is the portion of total rainfall
that is actually available for crop use.
Losses occur due to runoff, deep percolation, and evaporation.
Standard Formula
Effective Rainfall (mm) = Total Rainfall − Losses
Where losses include runoff, evaporation, and percolation
beyond the root zone.
Enter Required Data
Important Notes:
• Effective rainfall is always less than total rainfall
• Used for irrigation scheduling and NIR calculation
• Highly influenced by soil type and slope
