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Problem 24 A well is screened in a completely confined aquifer is to be pumped at a rate of 165000 ftd for 30 days If the aquifer transmissivity is 5320 ftd and the storativity is 00007what is

Problem 24 A well is screened in a completely confined aquifer is to be pumped at a rate of 165,000 ft/d for 30 days. If the aquifer transmissivity is 5320 ft/d and the storativity is 0.0007, what is the drawdown at 50, 150, 250, 500, 1000, 3000, 5000, and 10,000 ft Problem 25 If the aquifer in problem 24 is not completely confined, but overlain by a 8.0 ft leaky confining layer with a vertical hydraulic conductivity of 0.024 ft/d and no storativity, what would be the drawdown at the given distances and with the given pumping rate? Problem 26 Graph the change in head for the wells in problem 24 and 25 Problem 27-28 With reference to the well and aquifer system described in problem 25, compute the drawdown at a distance of 100 ft from the well at the following times: 1, 2, 5, 10, 15, 30, and 60 minutes; 2, 5, and 12 hours, and 1, 5, 10, 20 and 30 days. Use Microsoft Excel. Submit your excel files with work and the answers CLEARLY labeled. Well Function equations For the W(u), use the following equation to determine the W(u) value. Wu)- -0.975Infu)+0.9111 R2 0.9988 For the leaky well function (W(u, r/B) use: W(u, r/8) -3.5091e 167 if r/B 0.09 For the Besel function (K0): The Bessel function can be found in excel like this"- BESSELK(NUM, O) Where the NUM r/B Problem 24 A well is screened in a completely confined aquifer is to be pumped at a rate of 165,000 ft/d for 30 days. If the aquifer transmissivity is 5320 ft/d and the storativity is 0.0007, what is the drawdown at 50, 150, 250, 500, 1000, 3000, 5000, and 10,000 ft Problem 25 If the aquifer in problem 24 is not completely confined, but overlain by a 8.0 ft leaky confining layer with a vertical hydraulic conductivity of 0.024 ft/d and no storativity, what would be the drawdown at the given distances and with the given pumping rate? Problem 26 Graph the change in head for the wells in problem 24 and 25 Problem 27-28 With reference to the well and aquifer system described in problem 25, compute the drawdown at a distance of 100 ft from the well at the following times: 1, 2, 5, 10, 15, 30, and 60 minutes; 2, 5, and 12 hours, and 1, 5, 10, 20 and 30 days. Use Microsoft Excel. Submit your excel files with work and the answers CLEARLY labeled. Well Function equations For the W(u), use the following equation to determine the W(u) value. Wu)- -0.975Infu)+0.9111 R2 0.9988 For the leaky well function (W(u, r/B) use: W(u, r/8) -3.5091e 167 if r/B 0.09 For the Besel function (K0): The Bessel function can be found in excel like this"- BESSELK(NUM, O) Where the NUM r/B

 

Jul 04 2020 View more View Less

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