Subject: What is a good rule of thumb for the rate of water evaporation?

For a pond, if atmospheric conditions were known (Wet bulb temp, dry bulb temp, 
vapor pressures, temperature of water, etc) is there a good rule of thumb for 
the rate of water evaporation and obviously the required rate of water 
replenishment available?  I've seen data on salting ponds in the desert but 
there atmospheric conditions are considerably different.
Any response would be appreciated.

Thanks,

Re: What is a good rule of thumb for the rate of water evaporation?