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Precipitation = Et (winter ) + Eta (summer) + (D+R) + p S <br />where Et = Evapotranspiration with water not limiting <br />Eta = Actual evapotranspiration <br />D = Water lost by deep percolation <br />R = Water lost by surface runoff <br />~ S = Water holding capacity of the soil <br /> <br />The estimated climatic water balance and actual water balance <br />for revegetated TOSCO II processed shale on a horizontal surface <br />above the 8,000 foot elevation zone in Davis Gulch is as follows <br />(Wymore 1973): <br /> Temperature (T) for Nov.-Mar. = 33. 9°F, 26.0°, 24.3°, <br />' 25. 3°, 32.6° <br />Evaporation equivalent of solar <br />radiation (Rs) for Nov.-Mar. = 5.35, 4.52, 5.08, 6.14, 9.18 <br />Potential evapotranspiration (Etp) for Nov.-Mar. = 6.78" <br />Plant water use coefficient (Kc) for Nov.-Mar. = 0.50 each <br />month <br />Potential evapotranspiration for a given <br />vegetation type for Nov. - March (Et) = 3.40 <br />Annual precipitation (P) = 18.00" <br />Annual change in soil moisture storage (p S) = 0.00 <br />Actual evapotranspiration (Eta) for April - October = 13.75 <br />• <br />E-26 <br />