Two discharge wells (1 and 2) penetrating a confined aquifer are pumped at constant rates of 2572 m /day and 872 m /day, respectively. The aquifer transmissivity is 827 m /day. The steadystate drawdown measured at an observation well is 0.7 m The observation well is 50 m from well 1 and 189 m from well 2. Determine the drawdown at another point in the aquifer located 223 m from well I and 360 m from well 2,

Two discharge wells (1 and 2) penetrating a confined aquifer are pumped at constant rates of 2572 m /day and 872 m /day, respectively. The aquifer transmissivity is 827 m /day. The steadystate drawdown measured at an observation well is 0.7 m The observation well is 50 m from well 1 and 189 m from well 2. Determine the drawdown at another point in the aquifer located 223 m from well I and 360 m from well 2,

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

A single ideal pumping well, with radius of 1.0 ft and flow rate of 155 gpm, exists in an ideal confined aquifer. The aquifer has a saturated thickness of 82 ft. The pump continues running until equilibrium conditions are reached. The drawdown at the pumping well is 42 ft, and the drawdown at an observation well 138 ft away is 7.5 ft. Determine: Find the transmissivity in ft^2/day and hydraulic conductivity in ft^2/day Find the radius of influence in feet.
a) A 30-cm well completely penetrates an artesian aquifer. The length of the strainer* is 25 m. Determine the discharge from the well when the drawdown at the pumping well is 4.0 m. The coefficient of permeability of the aquifer is 45 m/day. Assume the radius of influence of the well is 350 m. *length of strainer = thickness of the aquifer b) A 30-cm well fully penetrates an unconfined aquifer of saturated depth 25 m. When a discharge of 2100 Ipm was being pumped for a long time, observation wells at radial distances of 30 m and 90 m indicated drawdown of 5 and 4 m respectively. i. Estimate the coefficient of permeability and transmissibility of the aquifer. ii. What is the drawdown at the pumping well? *Ipm = liters per minute *h = H - s, where H = saturated depth
To determine the permeability of an aquifer. The aquifer has a test well 300-mm in diameter with two observation wells. A pumping test was conducted for 24 hours with the discharge being held constant at 5,598.8 m^3/day. The first one, 88.03 meters from the test well, has a draw-down of 0.95 meters. The second one, 42 meters from the test well, has a draw-down of 1.39 meters.The static water table penetrates the well to a depth of 27 meters. Determine the radius of influence of the aquifer in meters.
Example 5.23 Two 30 cm wells completely penetrate an artesian aquifer of thickness 15 m ell decreases. spaced at 200 m. Permeability of the aquifer is 60 m/day. When one well is pumped at and are the rate 2000 Ipm, the drawdown in the well is 5 m. Assume a radius of influence of 300m and steady state conditions. What will be the discharge when both the wells are pumped keeping the drawdown at 5 m. If a third well is located at 200 m to form an equilateral triangle and all the three wells pumped keeping the drawdown at 5 m, what is the percentage reduction in discharge ? What is the percentage reduction in discharge if another well is added to form a square ?
(b) | A 400 mm diameter well fully penetrates a confined aquifer of thickness 20 m is pumped at a constant rate of 2500 m/day. The drawdown in the pumping well is observed as 4 m and the radius of influence is at a distance of 100 m. (i) Calculate the transmissivity of the aquifer; (ii) Determine the hydraulic conductivity of the aquifer material and draw the neat sketch of the well
14. Yuri wants to determine the permeability of an aquifer. The aquifer has a test well 300-mm in diameter with two observation wells. A pumping test was conducted for 24 hours with the discharge being held constant at 5618.7 m^3/day. The first one, 88.43 meters from the test well, has a draw-down of 0.52 meters. The second one, 48 meters from the test well, has a draw-down of 1.48 meters.The static water table penetrates the well to a depth of 27 meters. Determine the radius of influence of the aquifer in meters. Round off to three decimal places.
An unconfined aquifer is 10 m thick and is being pumped so that one observation well placed at a distance 76 m shows a drawdown of 0.5 m. On the opposite side of the extraction well is another observation well 100 m from the extraction well, shows a drawdown of 0.3 m. Assume the coefficient of permeability of 50 m/day. a.) What is the discharge f the extraction well? b.) Suppose the well at 100 m from the extraction well is now pumped. Show with a sketch what this will do to the drawdown. c.) Suppose the aquifer sits on an aquaclude that has a slope of 1/100. Show with a sketch what this will do to the drawdown.
. A pumping well with a radius of 0.5 m is located midway between a river and an impermeable boundary, which are 1,000 m apart. The well is pumped at a rate of 2 m³/day. Drawdown in the pumping well is 7.3 m. If T = 0.5 m²/day for the confined aquifer, calculate the steady-state drawdown at (a) the river and (b) the impermeable boundary.
The distance between two pumping wells is 100 m. The transmissivity of the confined aquifer, which all the wells fully penetrate, is 1000 m²/day. The radius of influence of each well is 800 m. The pumping rate for Well #1 is 2400 m?/day and the pumping rate for Well #2 is 1800 m³/day. Determine the steady-state drawdown at the point P as shown in the figure below 40 m 60 m Well #1 Well #2
A 30 cm well is pumped at the rate of 1000 ipm. The transmissibility of the aquifer is o.015 m²/s. If the well is located at a distance of 120 m from a stream, what should be the drawdown? (i) In the pumping well- (ii) In an observation well 80 m away from the pumping well on the side opposite to the stream? (iii) In an observation well 80 m away from the pumping well, on a line parallel to the stream?
Problem 1 A field test is conducted in a confined aquifer by pumping a constant discharge of 525 ft/hr from a 8-in. diameter well. After steady state is reached, a drawdown of 3.2 ft is measured in the pumped well. Also measured are drawdowns of 2.55 ft, 2.1 ft, 1.9 ft, and 1.86 ft respectively at 10, 150, 300, and 450 ft from the pumped well. Determine the transmissivity for this aquifer and the drawdown at a location 1,500 ft from the well. (Create a plot of s versus log r in excel and provide your plot)
Q2) A fully penetrating well of diameter 0.3 m is located in an uncontined aquifer of saturated depth 45 m. If the drawdown in the well is 15 m for the discharge of 1200 m³/day and the radius of influence is 300 m, compute hydraulic conductivity?