Needing an App to Calculate Evaporation Rates for Fresh Water

Like the title says........... I'm looking for an app to calculate evaporation rates (in gallons and/or barrels a day) for fresh water in ponds and small lakes.


Something that I can punch in.......

Surface area (Sq. ft. and/or Acers)
Ambient temp.
Water temp.
Humidity
Wind speed
and any other parameters needed.

Does anything like this exist?

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