WSE3701
QUESTION 2
Discuss how porosity and particle size affect a well’s ability to provide enough quantities of water. (10)
QUESTION 3
Calculate the transmissivity of an artesian aquifer that has a thickness of 5.5 m and is pumped at a rate of 1.52 m3 /min. There are two observation wells located at 150 m and 280 m away with drawdowns of 0.8 and 0.72 m respectively. (10)
QUESTION 4
An aquifer has T = 175 m2 /day, S = 1.3 x10-4, and provides a flow of 20 L/s to a well. Find the drawdown at the two observation wells located 15 and 65 m from the producing well after 1 day, 2 months, 10 months and 2 years.
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The drawdown doserved at a confined aquifer well after pumping it during 1400 minutes at a...
The drawdown doserved at a confined aquifer well after pumping it during 1400 minutes at a flow rate of 500 gal/min is 20.39 ft. The drawdowns observed at the same time at two observation wells located at 10 ft and 100 ft from the pumped well are 20 and 19.7 ft, respectively. Find the transmissivity of the aquifer and the well radius. Answ: T-8.8x105 gpd/ft, r-0.5 ft. 3.
Question 4 a. A well 50 cm in diameter penetrates 33 m below the static water...
Question 4 a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well the radius of influence of the pumped...
Question 5: (25 marks) A fully penetrating pumping well is located in a confined aquifer that can be considered to have an infinite extent in all directions. There is no recharge to the aquifer a...
Question 5: (25 marks) A fully penetrating pumping well is located in a confined aquifer that can be considered to have an infinite extent in all directions. There is no recharge to the aquifer and no other pumping wells in the area. There are two observation wells located at 100 and 500 m, respectively, from the pumping wells. The aquifer and the pumping well have the following properties: Depth to top of aquifer: 50 m Aquifer thickness: 5 m Aquifer...
a. A well 50 cm in diameter penetrates 33 m below the static water table. After...
a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well • the radius of influence of the pumped well,...
1) Three 610 mm wells are located on a straight line 304.8 m apart in an artesian aquifer With T- 3974 m^3/d/m and S 3 x 10^-5. The pumps are to be pumped for 10 days. Suppose we want to restrict...
1) Three 610 mm wells are located on a straight line 304.8 m apart in an artesian aquifer With T- 3974 m^3/d/m and S 3 x 10^-5. The pumps are to be pumped for 10 days. Suppose we want to restrict the drawdown in each of the wells to 18.3m. What will be the coresponding discharge for the individual wells?
1) Three 610 mm wells are located on a straight line 304.8 m apart in an artesian aquifer With T-...
3) If the steady state pumping rate of an artesian aquifer, 155,000,000 gallons per year are...
3) If the steady state pumping rate of an artesian aquifer, 155,000,000 gallons per year are being pumped by a fully penetrating well, a. What is the hydraulic conductivity if the aquifer is 166 feet thick and composed of medium sand? The drawdown at an observation well 48 feet away is 9 feet; in a second observation well 490 feet away it is 1.1 feet. b. If you have another observation well, between these two wells, 250 feet away from...
assume student identification number is 918656949. thank you 3) If the steady state pumping rate of...
assume student identification number is 918656949. thank
you
3) If the steady state pumping rate of an artesian aquifer, in gallons per year being pumped by a fully penetrating well, is equal to your student identification number, a. What is the hydraulic conductivity if the aquifer is 166 feet thick and composed of medium sand? The drawdown at an observation well 48 feet away is 9 feet; in a second observation well 490 feet away it is 1.1 feet. (3...
1. (2 points) A well in a uniform, homogeneous, isotropic confined aquifer is pumped at a...
1. (2 points) A well in a uniform, homogeneous, isotropic confined aquifer is pumped at a rate of 815 L/min. After 3 days it looks as if the water levels have stabilized in observation wells at distances of 20 m and 200 m from the pumping well. The drawdown in the well at 20 m is 6.5 m and the drawdown in the well at 200 m is 3.5 m. a) Use the Thiem solution to determine the aquifer transmissivity....
Q2) A canal of trapezoidal section has bed width of 8 m and bed slope of...
Q2) A canal of trapezoidal section has bed width of 8 m and bed slope of 1 in 4000. If the depth of flow is 2.4 m and side slopes of the chamel are 1 horizontal to 3 vertical, determine the average flow velocity and the discharge carried by the channel. Also compute the average shear stress at the channel boundary. Take value of Chezy's constant = 55. Q3) 6.11. A power canal of trapezoidal section has to be excavated...
Examples Example 3: A well of diameter 0.5 m fully penetrates a confined aquifer. The well...
Examples Example 3: A well of diameter 0.5 m fully penetrates a confined aquifer. The well is pumped for a test at 0.833 m3/min and the values of the drawdown at an observation well 20 m from the pumped well are measured at different times. The results are tabulated below. Determine the transmissivity and the storage coefficient of the aquifer using Jacob equation. Time,t min) Prawdown, 0.57 1.49 10 2.43 20 3.31 40 4.34 60 4.97 s (m)
The drawdown doserved at a confined aquifer well after pumping it during 1400 minutes at a flow rate of 500 gal/min is 20.39 ft. The drawdowns observed at the same time at two observation wells located at 10 ft and 100 ft from the pumped well are 20 and 19.7 ft, respectively. Find the transmissivity of the aquifer and the well radius. Answ: T-8.8x105 gpd/ft, r-0.5 ft. 3.
Question 4 a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well the radius of influence of the pumped...
Question 5: (25 marks) A fully penetrating pumping well is located in a confined aquifer that can be considered to have an infinite extent in all directions. There is no recharge to the aquifer and no other pumping wells in the area. There are two observation wells located at 100 and 500 m, respectively, from the pumping wells. The aquifer and the pumping well have the following properties: Depth to top of aquifer: 50 m Aquifer thickness: 5 m Aquifer...
a. A well 50 cm in diameter penetrates 33 m below the static water table. After a long period of pumping at a rate of 80 m/h, the drawdowns in two observation wells A and B, 18 and 45 m from the pumped well, were found to be 1.8 and 1.1 m respectively. Determine . the hydraulic conductivity of the aquifer (in m/d) . the expected drawdown in the pumped well • the radius of influence of the pumped well,...
1) Three 610 mm wells are located on a straight line 304.8 m apart in an artesian aquifer With T- 3974 m^3/d/m and S 3 x 10^-5. The pumps are to be pumped for 10 days. Suppose we want to restrict the drawdown in each of the wells to 18.3m. What will be the coresponding discharge for the individual wells?
1) Three 610 mm wells are located on a straight line 304.8 m apart in an artesian aquifer With T-...
3) If the steady state pumping rate of an artesian aquifer, 155,000,000 gallons per year are being pumped by a fully penetrating well, a. What is the hydraulic conductivity if the aquifer is 166 feet thick and composed of medium sand? The drawdown at an observation well 48 feet away is 9 feet; in a second observation well 490 feet away it is 1.1 feet. b. If you have another observation well, between these two wells, 250 feet away from...
assume student identification number is 918656949. thank
you
3) If the steady state pumping rate of an artesian aquifer, in gallons per year being pumped by a fully penetrating well, is equal to your student identification number, a. What is the hydraulic conductivity if the aquifer is 166 feet thick and composed of medium sand? The drawdown at an observation well 48 feet away is 9 feet; in a second observation well 490 feet away it is 1.1 feet. (3...
Q2) A canal of trapezoidal section has bed width of 8 m and bed slope of 1 in 4000. If the depth of flow is 2.4 m and side slopes of the chamel are 1 horizontal to 3 vertical, determine the average flow velocity and the discharge carried by the channel. Also compute the average shear stress at the channel boundary. Take value of Chezy's constant = 55. Q3) 6.11. A power canal of trapezoidal section has to be excavated...
Examples Example 3: A well of diameter 0.5 m fully penetrates a confined aquifer. The well is pumped for a test at 0.833 m3/min and the values of the drawdown at an observation well 20 m from the pumped well are measured at different times. The results are tabulated below. Determine the transmissivity and the storage coefficient of the aquifer using Jacob equation. Time,t min) Prawdown, 0.57 1.49 10 2.43 20 3.31 40 4.34 60 4.97 s (m)
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