Hydrology Question:
For the Embarras River at Camargo, IL, 1978 to 1998, the precipitation (P) = 40 in/yr, average stream flow (Q) = 188 ft^3/sec, and the watershed area = 186 mi^2. Estimate the average annual evapotranspiration for this watershed and this period, assuming net groundwater flows and changes in storage are negligible.