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MY <br /> ow.H.- <br /> Capture Zone calculations <br /> Tri Valley Growers-ThOrntOn <br /> Assuming g - l liter/minute (pumping rate) - 50.85 ft3/day <br /> b - 10 ft (saturated thickness of aquifer) <br /> T - 195 gallons/day/ft (transmissivity from pumping test) <br /> i - 0.0034 ft/ft (hydraulic gradient from monitoring data) <br /> d - 0.20 (estimated effective porosity) <br /> Vn - natural velocity of groundwater <br /> Vp - pumping velocity of groundwater <br /> ro - radius of capture <br /> Vn - Ti/bC( Vp - ()/2rrrbCr <br /> The capture zone limit in 'the downgradlent direction <br /> occurs radius r where Vn - Vp <br /> Ti/brl - 0/2 rba or rc - 0/211 Ti <br /> rc 91.55 ft. <br />