 Penman–Monteith equation

The Penman–Monteith equation is a widely used formula in hydrology and agronomy that estimates potential evapotranspiration (ET). This is the amount of water that would be transferred from the land surface to the atmosphere due to the processes of evaporation and transpiration under ideal conditions, where sufficient moisture is available in the soil. The equation incorporates factors such as temperature, humidity, wind speed, and solar radiation, which influence evapotranspiration rates.