Laserfiche WebLink
Drawdown and dewatering from Marinelli and Niccoli (2000) <br />h = 23 saturated thickness above pit base at radial distance Ro from pit center (feet) <br />hp = 2 saturated thickness above pit base at pit wall, Rp (feet) <br />W = 0.002831 distributed recharge flux (feet/day) <br />Kh = 480 horizontal hydraulic conductivity (feet/day) <br />r, = 8610 radial distance from pit center (feet) <br />rp = 1600 radial distance to pit wall (feet) <br />h = 22.99481 by iteration <br />Pit inflow <br />Q = 636240 cf /day <br />3305 gpm <br />r <br />r from pit <br />h <br />8650 <br />7050 <br />23 <br />8650 <br />7050 <br />23 <br />8610 <br />7010 <br />22.99481 <br />8600 <br />7000 <br />22.99479 <br />8400 <br />6800 <br />22.9891 <br />8200 <br />6600 <br />22.97288 <br />8000 <br />6400 <br />22.94584 <br />7800 <br />6200 <br />22.90766 <br />7600 <br />6000 <br />22.85796 <br />7400 <br />5800 <br />22.79634 <br />7200 <br />5600 <br />22.72234 <br />7000 <br />5400 <br />22.63543 <br />6800 <br />5200 <br />2253503 <br />6600 <br />5000 <br />22.42049 <br />6400 <br />4800 <br />22.29106 <br />6200 <br />4600 <br />22.14591 <br />6000 <br />4400 <br />21.98408 <br />5800 <br />4200 <br />21.80451 <br />5600 <br />4000 <br />21.60596 <br />5400 <br />3800 <br />21.38701 <br />5200 <br />3600 <br />21.14603 <br />5000 <br />3400 <br />20.88114 <br />4800 <br />3200 <br />20.59013 <br />4600 <br />3000 <br />20.2704 <br />4400 <br />2800 <br />19.91888 <br />4200 <br />2600 <br />19.53187 <br />4000 <br />2400 <br />19.10491 <br />3800 <br />2200 <br />18.63252 <br />3600 <br />2000 <br />18.10789 <br />3400 <br />1800 <br />17.52235 <br />3200 <br />1600 <br />16.8647 <br />3000 <br />1400 <br />16.12007 <br />2800 <br />1200 <br />15.26799 <br />2600 <br />1000 <br />14.27915 <br />2400 <br />800 <br />13.109 <br />2200 <br />600 <br />11.68395 <br />2000 <br />400 <br />9.865044 <br />1800 <br />200 <br />7.313909 <br />uyi 25 <br />d <br />C <br />Y <br />t 20 <br />H <br />X 15 <br />�LL <br />M X10 <br />E <br />3 <br />> 5 <br />Q <br />0 L <br />0 <br />2,000 4,000 6,000 <br />Distance from Edge of Pit (feet) <br />8,000 <br />W = assume 12 in /yr precip @ 20% and 20 in /yr irrigation <br />@ 50% (32 in /yr ave hay /corn requirement minus <br />precip and 50% percolation from furrow irrigation) <br />