Evaporation

[JohnT]

I agree with the other posts: This is beyond what you can do manually. Maybe if you had a computer with a weather station and sensors to check pool temperature and sunlight intensity, you might be able to write software to simulate the evaporation. Much too complex a calculation by hand, as it can change from one second to the next.

[mas985]

If you are really want to do evaporation calcs, here are a few links to start your quest:

http://www.grow.arizona.edu/Grow--Gr...ResourceId=208
http://www.thermexcel.com/english/program/pool.htm