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<br />0923 <br /> <br />Since very little groundwater development has taken place on NOSR 1, <br />the groundwater system is essentially in a state of hydrologic equilibrium. <br />This state of equilibrium implies that the rate of discharge from the <br />~ <br />system, which is approximated by surface water baseflow, is equal to the <br />rate of recharge (deep percolation) with no change in storage. Therefore, <br />the estimated range of baseflow for Water Years 1979 and 1980 approximates <br />the groundwater recharge for these two years. 8aseflow for these two years <br />range from 0.59 to 1.07 area-inches (1,482 to 2,652 acre-feet) indicating <br />that less than 5 percent of total annual precipitation enters the <br />groundwater system through deep percolation. <br /> <br />An estimate of water in storage on NOSR 1 has been calculated for a <br />fracture porosi~ range of 1 to 5 percent. Using these porosities and an <br />estimate of the total saturated volume of all four water-bearing zones, <br />NOSR 1 contains between 110,000 and 560,000 acre-feet of groundwater in <br />storage. <br /> <br />1-5 <br />