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5.2 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A well that is screened in a confined aquifer is to be pumped at a rate of 165,000 ft3/d for 30
d. If the aquifer transmissivity is 5320 ft2/day, and the storativity is 0.0007, what is the drawdown at distances of 50, 150, 250, 500, 1000, 3000, 5000, and 10,000 ft?
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5.3 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.Plot the distance-drawdown data from Problem 1 on semilog paper (or on Excel).
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5.4 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.If the pumping well from Problem 1 has a radius of 1 ft, and the observed drawdown in the pumping well is 87 ft, what is the efficiency of the well?
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5.5 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.Plot the distance-drawdown data from Problem 2 on semilog paper (or on Excel).
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5.6 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.If the pumping well has a radius of 1 ft, and the observed drawdown in the pumping well is 64 ft, what is the efficiency of the well?
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5.7 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.If the aquifer in Problem 1 is not fully confined, but is overlain by a 13.7-ft-thick confining layer with a vertical hydraulic conductivity of 0.13 ft/d and no storativity, what would be the drawdown values after 30 days of pumping at 325 gal/min at the indicated distances?
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5.8 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.If the aquifer described in Problem 2 is not fully confined, but is overlain by a 8.0-ft-thick leaky, confining layer with a vertical hydraulic conductivity of 0.034 ft/d, what would be the drawdown values after 30 days of pumping at 165,000 ft3/d at the indicated distances?
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5.9 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.With reference to the well and aquifer system in Problem 1, compute the drawdown at a distance of 250 ft at the following times: 1, 2, 5, 10, 15, 30, and 60 min; 2, 5, and 12 h; and 1, 5, 10, 20, and 30 d.
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5.10 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.With reference to the well and aquifer system in Problem 8, compute the drawdown at a distance of 100 ft from the well at the following times: 1, 2, 5,10, 15, 30, and 60 min; 2, 5, and 12 h; and 1, 5, 10, 20, and 30 d.
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5.11 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.Plot the time-drawdown data from Problem 9 on semilog paper.
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5.12 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.Plot the time-drawdown data from Problem 10 on semilog paper. How is this plot different from that of Problem 11?
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5.13 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A well that pumps at a constant rate of 78,000 ft3/d has achieved equilibrium so that there is no change in the drawdown with time. (The cone of depression has expanded to include a recharge zone equal to the amount of water being pumped.) The well taps a confined aquifer that is 18 ft thick. An observation well 125 ft away has a head of 277 ft above sea level; another observation well 385 ft away has a head of 291 ft. Compute the value of aquifer transmissivity using the Thiem equation.
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5.14 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A well that pumps at a constant rate of 78,000 ft3/d has achieved equilibrium so that there is no change in the drawdown with time. (The cone of depression has expanded to include a recharge zone equal to the amount of water being pumped.) The well taps an unconfined aquifer that consists of sand overlying impermeable bedrock at an elevation of 260 ft above sea level. An observation well 125 ft away has a head of 277 ft above sea level; another observation well 385 ft away has a head of 291 ft. Compute the value of hydraulic conductivity using the Thiem equation.
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5.15 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A slug test was performed on a monitoring well with a radius of 2 in. and a sand pack radius of 5 in. The aquifer thickness was 8 ft and the initial height of the water column in the casing above the top of the screen was 51 ft. The following data showing the change in the elevation of the water in the casing with time were collected following the lowering of a solid slug into the water. Find the aquifer transmissivity of you assume a storativity of 0.001....
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5.16 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.The following data are from a pumping test where a well was pumped at a rate of 200 gal per minute. Drawdown as shown was measured in an observation well 250 ft away from the pumped well. The geologist’s log of the well is as follows:......A steel well casing was cemented to a depth of 182 ft and the well was extended as an open boring past that point.
(A) Plot the time-drawdown data on 3 × 5 cycle logarithmic paper. Use the Theis type curve to find the aquifer transmissivity and storativity. Compute the average hydraulic conductivity.(B) Replot the data on four-cycle semilogarithmic paper. Use the Cooper-Jacob straight-line method to find the aquifer transmissivity and storativity.
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5.17 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A test well was drilled to a total depth of 117 ft with the following geologist’s log:...The depth to water was 55 ft. The test well was screened from 82 to 117 ft. It was pumped at a rate of 560 gal/min. Drawdown was measured in an observation well that was also screened from 82 to 117 ft and was located 82 ft away from the pumping well. The following time-drawdown data were obtained:...
(A) Plot the time-drawdown data on 3 × 5 cycle logarithmic paper. Compute the value of the storativity and transmissivity of the aquifer using the graphical method for leaky aquifers. Find the vertical hydraulic conductivity of the confining layer.(B) Compute the value of aquifer storativity and transmissivity of the aquifer using the Hantush inflection-point method.
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5.18 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A slug test was made with a piezometer that had a casing radius of 2.54 cm and a screen of radius 2.54 cm. A slug of 4000 cm3 of water was injected; this raised the water level by 197.3 cm. The well completely penetrated a confined stratum that was 2.3 m thick. The decline in head with time is given in the following chart:...Plot the data on semilogarithmic paper and find the aquifer transmissivity and storativity using the Cooper-Bredehoeft-Papadopulos method.
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5.19 Type curves will be necessary for the solution of many of these problems. Type curves can be constructed from the data in the appendices, although this process is laborious. Type curves have been published for a number of aquifer tests on confined aquifers. The curves were derived by, among others, the Theis method, the two methods for leaky artesian aquifers given in this chapter, and the Cooper-Bredehoeft- Papadopulos method. (J. E. Reed, “Type Curves for Selected Problems of Flow to Wells in Confined Aquifers,” in Techniques of Water-Resources Investigations of the United States Geological Survey, Book 3, Chapter B3, 1980. This is available from the U.S. Government Printing Office, Washington, D.C., or Scientific Publications Company, P.O. Box 23041, Washington, D.C. 20026-3041.) The published type curves use 3 × 5 cycle logarithmic graph paper with 1.85 in. for each log cycle, such as Keuffel and Esser Co. 46 7522, and semilogarithmic graph paper with 2.00 in. per log cycle, such as Keuffel and Esser Co. 46 6213. The Jacob straight-line methods will require fourcycle semilogarithmic paper such as Keuffel and Esser Co. 46 6013. Instructors may request a copy of the solution manual for Applied Hydrogeology from their Prentice-Hall representative. Type curves for these problems are contained therein.A well in a water-table aquifer was pumped at a rate of 873 m3/d. Drawdown was measured in a fully penetrating observation well located 90 m away. The following data were obtained (Kruseman & deRitter 1991):Find the transmissivity, storativity, and specific yield of the aquifer....
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