Question

You are performing a study of evaporation from Lake Patagonia in southern Arizona. The inflow of water is measured at a nearby USGS gauging station immediately upgrading of the lake and averages about 15.8 cubic feet per second (cfs) for a 30-day period. precipitation in the area totaled 4.5 inches during the same period. The lake has a surface area of 265 acres and you can assume the sides of the lake are vertical. At the beginning of the study period, the lake elevation is 3765.5 feet above sea level (asl) and at the end of the study, the lake level was 3766.9 feet (asl). Outflow was regulated at the dam spillway and averaged 10.2 cfs. Estimate the evaporation from Patagonia Lake for the 30-day period of the study. Express your answer in inches and acre-feet. Assume that groundwater inputs and outputs are negligible.

Answer 1

Answer 2