Question: Using the Hefner equation, find the daily evaporation rate ( in mm / day ) for a lake of area 5 km 2 given that

Using the Hefner equation, find the daily evaporation rate (in mm/day) for a lake
of area 5 km2 given that the mean air temperature is 20\deg C and water surface
temperature is 15\deg C. The average wind speed is 15 km/h, and relative humidity
is 20%(all the measures in air are at 2m height).

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