### Applied Hydrogeology - Fetter - 4t Edition - Chapter 12 - Solutions

12.1 This is a two-layer, seismic-refraction problem. A seismic line was run with the following first-arrival- time results:...
(A) Find V1.(B) Find V2.(C) Find ic.(D) Find Z.
Get solution

12.2 This is a three-layer seismic problem. Table 12.2 contains first-arrival times that were measured in both the forward and reverse directions. Find the seismic velocities for each layer in each direction; then average them and use the average values to find Z1 and Z2 as well as the critical angle between layer 1 and layer 2.
Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 10 - Solutions

10.1 A saline solution with a concentration of 1823 mg/L is introduced into a 2-m-long sand column in which the pores are initially filled with distilled water. If the solution drains through the column at an average linear velocity of 1.43 m/day and the dynamic dispersivity of the sand column is 15 cm, what would the concentration of the effluent be 0.7 day after flow begins?
Get solution

10.2 Given the flow situation in Problem 1, what would the effluent concentration be 1.1 days after flow begins?
Get solution

10.3 A landfill is leaking an effluent with a concentration of sodium of 1250 mg/L. It seeps into an aquifer with a hydraulic conductivity of 9.8 m/day, a gradient of 0.0040, and an effective porosity of 0.15. A down-gradient monitoring well is located 25 m from the landfill. What would the sodium concentration be in this monitoring well 300 days after the leak begins? Note: In this problem you will need to find erfc(−x), which is equal to 1 + erf(x).
Get solution

10.4 What would the concentration of sodium be at the same time at a monitoring well located 37 m down- gradient of the leaking landfill?
Get solution

10.5 What is the relative velocity of a solute front of a solute-soil system with a distribution coefficient of 83 mL/g, a dry bulk density of 2.12 gm/cm3, and a volumetric water content of 0.26?
Get solution

10.6 What is the relative velocity of a solute front of a solute-soil system with a distribution coefficient of 3.9 mL/g, a dry bulk density of 1.88 gm/cm3, and a volumetric water content of 0.20?
Get solution

10.7 A capture well is pumping at a rate of 37,000 ft3/day from a confined aquifer with a hydraulic conductivity of 920 ft/d, an initial hydraulic gradient of 0.0027, and an initial saturated thickness of 40 ft.
(A) What is the maximum width of the capture zone?
(B) What is the distance from the well to the stagnation point?

Get solution

10.8 A capture well is pumping at a rate of 2500 m3/day from a confined aquifer with a hydraulic conductivity of 1425 m/day, an initial hydraulic gradient of 0.00076, and a saturated thickness of 31 m.
(A) What is the maximum width of the capture zone?
(B) What is the distance from the well to the stagnation point?

Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 9 - Solutions

9.1 How much KCl is in one liter of a 0.26-molar solution?
Get solution

9.2 How much NaCl is in one liter of a 0.75-molar solution?
Get solution

9.3 The solubility product for CuCl is 10−5.9. What is the solubility of Cu+ at equilibrium with CuCl?
Get solution

9.4 The solubility product of CaSO4 is 10−4.5. What is the solubility of Ca2+ at equilibrium with CaSO4?
Get solution

9.5 The solubility product of fluorite, CaF2, is 10−10.5.
(A) What is the solubility or Ca2+ at equilibrium with fluorite?
(B) If CaF2 is dissolved in a solution of 0.009-molar F, how much will dissolve at equilibrium?

Get solution

9.6 The solubility product of MgF2 is 10−8.2
(A) What is the solubility of Mg2+ at equilibrium with MgF2?
(B) If MgF2 is dissolved in a solution of 0.011-molar F, how much will dissolve at equilibrium?

Get solution

9.7 Given the following ground-water analysis at 25°C:...
(A) Convert all analyses into molal concentrations.
(B) Compute ionic strength.
(C) Compute activity coefficient for each ion.
(D) Find activity of each ion.
(E) Convert analyses to meq/L.
(F) Do a cation-anion balance..
(G) Find the Kiap of anhydrite (CaSO4).
(H) Compare the Kiap of anhydrite with the Ksp of anhydrite (10−4.5).
(I) Find the Kiap of calcite (CaCO3).
(J) Compare the Kiap of calcite with the Ksp of calcite (10−8.4).

Get solution

9.8 Given the following ground-water analysis at 25°C:...
(A) Convert all analyses into molal concentrations.
(B) Compute ionic strength.
(C) Compute the activity coefficient for each ion.
(D) Find the activity of each ion.
(E) Convert analyses to meq/L.
(F) Do a cation-anion balance.
(G) Find the Kiap of anhydrite (CaSO4).
(H) Compare the Kiap of anhydrite with the Ksp of anhydrite (104.5).
(I) Find the Kiap of calcite (CaCO3).
(J) Compare the Kiap of calcite with the Ksp of calcite (108.4).

Get solution

9.9 What are [H+] and [OH] for an aqueous solution at pH 9.32?
Get solution

9.10 What are [H+] and [OH] for an aqueous solution at pH 3.21?
Get solution

9.11 What is the pH of a 0.0041-molal solution of H2CO3?
Get solution

9.12 What is the pH of a 0.0075-molal solution of H2CO3?
Get solution

9.13 What is the pH of a 0.0041-molal solution of HCl?
Get solution

9.14 Given the following analysis of ground water:......
(A) Convert all values to meq/L.
(B) Do an anion-cation balance.
(C) Plot the position on a trilinear diagram (Figure 9.17).
(D) Make a Stiff pattern of the analysis.
(E) Make a Schoeller diagram of the analysis.

Get solution

9.15 The solubility product at 25°C for barite (BaSO4) is 10−9.97 and the ΔH0r is 26.6 kJ/mol. R is 8.3143 J/mol-K. What is the solubility product of barite in a hot springs with a temperature of 43°C?
Get solution

9.16 The solubility product at 25°C for magnesite (MgCO3) is 10−8.03 and the ΔH0r is −25.81 kJ/mol. R is 8.3143 J/mol K. What is the solubility product of magnesite in water at a temperature of 12°C?
Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 8 - Solutions

8.1 At a tropical coastal aquifer the ground water is stagnant. The density of fresh water is 0.998 g/cm3 and that of the underlying salt water is 1.024 g/cm3. If the fresh-water head is 14.2 ft above mean sea level, what is the depth to the salt-water interface?
Get solution

8.2 The fresh water at a coastal area has a density of 0.999 g/cm3, and the underlying saline water has a density of 1.025 g/cm3. If the fresh-water head is 3.75 m above mean sea level, what is the depth to the saltwater interface?
Get solution

8.3 A coastal aquifer has a mean hydraulic conductivity of 2.61 m/day. The density of fresh water is 1.000 g/cm3 and the density of underlying saline water is 1.024 g/cm3. The ground-water discharge per unit width of the coastline is 0.00345 m2/d.
(A) What is the depth to the salt-water interface at a point 125 m inland?
(B) What is the elevation of the water table above mean sea level at a point 125 m inland?
(C) What is the depth to the salt-water interface at the shoreline?
(D) What is the width of the outflow face?

Get solution

8.4 A coastal aquifer has a mean hydraulic conductivity of 4.15 m/d. The density of fresh water is 1.000 g/cm3 and the density of underlying saline water is 1.025 g/cm3. The ground-water discharge per unit width of the coastline is 0.0127 m2/d.
(A) What is the depth to the salt-water interface at a point 100 m inland?
(B) What is the elevation of the water table above mean sea level at a point 100 m inland?
(C) What is the depth to the salt-water interface at the shoreline?
(D) What is the width of the outflow face?

Get solution

8.5 The aquifer beneath a circular oceanic island has a mean hydraulic conductivity of 312 ft/d. The amount of recharge is 0.00831 ft/d. The density of fresh water is 1.000 g/cm3 and the density of underlying saline water is 1.024 g/cm3. If the island is 8715 ft in diameter, what is the depth to the salt-water interface in the center of the island?
Get solution

8.6 The aquifer beneath an infinite-strip oceanic island has a mean hydraulic conductivity of 312 ft/d. The amount of recharge is 0.00831 ft/d. The density of fresh water is 1.000 g/cm3 and the density of underlying saline water is 1.024 g/cm3. If the island is 8715 ft in width, what is the depth to the salt-water interface in the center of the island?
Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 7 - Solutions

7.1 Copy Figures 7.34, 7.35, and 7.36. Draw sufficient flow lines on them to illustrate the regional flow patterns. Assume that the aquifers are isotropic so that the flow lines cross the equipotential lines at right angles.
Get solution

7.2 Based on the flow fields shown on Figures 7.3 and 7.8, draw a flow net on Figure 7.38.
Get solution

7.3 Answer the following questions based on Figure 7.39.
(A) Fill in the heads at the locations labeled on the diagram.
(B) Find one place on Figure 7.39 where recharge is occurring, and label it R.
(C) Find one place on Figure 7.39 where discharge is occurring, and label it D.
(D) Draw in flow lilies on Figure 7.39 starting at points X, Y, and Z.
...
Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 6 - Solutions

6.1 A soil sample is collected and taken to the lab. The volume of the sample is 75 cm3. At the natural water content, the sample weighs 158.88 g. It is then saturated with water and reweighed. The saturated weight is 164.34 g. The sample is gravity drained, and its weight is found to be 147.30 g. Finally, it is oven- dried; the dry weight is 142.89 g. Assume the density of water is 1.00 g/cm3. Find each of the following:
(A) Volumetric water content(B) Gravimetric water content(C) Saturation ratio(D) Porosity(E) Specific yield(F) Specific retention(G) Dry bulk density(H) Porosity computed from density

Get solution

6.2 A soil sample is collected and taken to the lab. The volume of the sample is 75 cm3. At the natural-water content, the sample weighs 168.00 g. It is then saturated with water and reweighed. The saturated weight is 171.25 g. The sample is gravity drained, and its weight is found to be 160.59 g. Finally, it is oven- dried; the dry weight is 157.22 g. Assume the density of water is 1.0 g/cm3. Find each of the following:
(A) Volumetric water content(B) Gravimetric water content(C) Saturation ratio(D) Porosity(E) Specific yield(F) Specific retention(G) Dry bulk density(H) Porosity computed from density

Get solution

### Applied Hydrogeology - Fetter - 4t Edition - Chapter 5 - Solutions

5.1 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 community is installing a new well in a regionally confined aquifer with a transmissivity of 1589 ft2/day and a storativity of 0.0005. The planned pumping rate is 325 gal/min. There are several nearby wells tapping the same aquifer, and the project manager needs to know if the new well will cause significant interference with these wells. Compute the theoretical drawdown caused by the new well after 30 days of continuous pumping at the following distances: 50, 150, 250, 500, 1000, 3000, 6000, and 10,000 ft. (This problem and the following problem can readily be solved using Excel with the algorithm that is suggested in Analysis K. The repetitive nature of the calculations is especially suited to a spreadsheet solution.)
Get solution

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?
Get solution

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).
Get solution

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?
Get solution

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).
Get solution

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?
Get solution

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?
Get solution

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?
Get solution

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.
Get solution

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.
Get solution

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.
Get solution

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?
Get solution

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.
Get solution

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.
Get solution

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....
Get solution

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.

Get solution

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.

Get solution

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.
Get solution

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....
Get solution