Evaporation depends on the water surface temperature and dew point. During the drought this winter, we have sometimes had pond surface temp in the high 50's with dew points in the high 20s to low 30's, along with strong winds. That leads to considerable evaporation.
You probably do have some small leakage in addition to evaporation. If I could get my leakage down to 1/4 inch a day when the pond is high, I would be happy. Mine's about 5/8 inch a day when the water level is high. After about 30 inches of decreasing per day loss, the water loss is about 1/8 inch per day.
I tried Soilfloc last year in the areas I thought my leaks were, and they slowed a little but the losses resumed after a few weeks.
Last edited by John F; 03/08/17 09:59 PM.
