How do you calculate the evaporation loss of water in a open storage tank?

To calculate the evaporation loss of water in an open storage tank, you can use the formula: Evaporation Loss = Area × Evaporation Rate × Time. The area is the surface area of the water in the tank, the evaporation rate can be determined from meteorological data (typically in mm/day), and time is the duration over which evaporation occurs. Adjustments may be necessary for factors like temperature, humidity, and wind speed, as they can significantly influence the evaporation rate.