Correct Answer - Option 3 : EL
- The process of transformation of liquid water into a gaseous form is called evaporation.
- It gives the relationship between the rate of evaporation and the difference between the saturation vapour pressure and existing vapour pressure, by the following expression
EL = C(es - ea)
Where, EL = Rate of evaporation (mm/day), C = Constant, es = Saturation vapour pressure in mm of mercury, ea = Existing vapour pressure in mm of mercury
Dependency of the rate of evaporation on various factors:
Increases with an increase in vapour pressure at the water surface and air above it.
Increases with increases in Air and water temperature.
Increases when wind speed is above critical Wind speed.
Decrease with the increase in Atmospheric pressure.
||Used for measuring