So after the first day of draining naturally, I lost 7" of water.

I originally overestimated the size of the pond, it is an ellipse, so it is about 75x55 at widest points at when full. This calculated to 3,239 ft2 or .07 acres.

So if my math is correct 27,154 gallons in an inch acre x .07 acres = 1900 gallons per inch lost x 7 = 13,300 gallons lost the first day or around 10% of the total volume of gallons in the pond! I figure the pond to be between 120,000 and 150,000 gallons.

I figure this to be about correct given my 11 gpm has to run about a little less than a day to fill the pond back to normal.

Matt

Last edited by DuckFoot; 06/04/15 07:45 PM.