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Page C-3 <br />dx ~~ <br />a <br />ROCK <br />Q f~~ FLUID <br />3 Q =volumetric flow rate <br />d ~ d =effective joint apeHUre <br />Q=- ~ 2 U dx k =dynamic viscosity <br />dP = pressure prndient <br />dx <br />FLOW RATE PROPORTIONAL TO <br />APPARENT JOINT APERTURE CUBED <br />~6a <br />On <br />fi <br />p ROCK <br />6~ <br />w <br />a <br />O <br />COMPRESSIVE STRESS, 6 <br />JOINT CLOSUREIOPENING VARIES <br />HYPERBOLICALLI' WITH EFFECTIVE NORMAL STRESS <br />Figure C-1. Fluid Flow in a Natural Fracture <br />Agapito Associates, Inc. <br />