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"i•^r " - �� —�- '.mss,- - �� - -- - <br /> Work Plan <br /> Stewart's Beacon <br /> Prajett No.01-17.1.2 <br /> March 12,1940 <br /> Page: 6 <br /> hd=saturated thickness at distance r downgradient from v a+Il <br /> iu=slope of water table at distance r upgmdient from veli` <br /> id=slope of water table at distance r downgradient from well <br /> Since several parameters usually are unknown at any one time, the equation <br /> cannot be solved and is tleerefore of limited practical use in this case. However, <br /> from equation 4.1 can be derived the following equation by which the boundary <br /> _. of the region producing inflow(draw-down area)can be calculated: <br /> -y -tan (2xKhdi y) (3.2) <br /> x <br /> Where: <br /> i =natural slope of the water table <br /> ho=uniform saturated aquifer thickness <br /> y =maximum distance of influence laterally from well <br /> The finite limit for y is: <br /> YL <br /> f 2Khoi <br /> The"stagnation point"(flow divide)downstream is: <br /> 2nKhoi <br /> W and the upgradient inflow limit at any one time is: <br /> 2xXL <br /> (3.5) - <br /> Q -approximately 3-5 gallons or 0.476 ft3/min, may be pumped (avg.of 2-5' <br /> gal/min) <br /> J K <br /> -about 0.02 ft/min. 0.0486ft/min-(avg of.197 ft/min-.0002 ft/rrun) <br /> T r ---- -- (clean sand) (silty sand) <br /> ho-approximately 10 ft <br /> i -0.0042 feet/foot <br />