Given questions are subparts please give me all right solutios A fully penetrating well in an unconfined aquifer is pumped continuously so that thesteady state drawdown is 12 m. The water table is at a height of 55 m above the bottomof the aquifer, which has a hydraulic conductivity of 22 m/d. The diameter of the well is0.25 m.(a) If the pumping rate has no effect on the water table at a distance of 1.2 km from thepumping well, determine the pumping rate.Answer:m' per hour(b) Determine the drawdown in an observation well 600 m away from the pumping wellAnswer:m(c) Determine the travel time from the observation well to the pumping well if the aquiferhas a porosity of 0.3.Answer:days

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Answered: A fully penetrating well in an…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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Problem 1P

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Exercise1 A 30 cm well penetrates 30 m below static water level. After a long period of pumping at a rate of 1800 lit/min, the drawdowns in the observation wells at 12 m and 36 m from the pumped well are 1.2 m and 0.5 m, respectively. Determine: A. The transmissibility of the aquifer B. The drawdown in the pumped well assuming R = 300 m. C. The specific capacity of the well.
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?
A 20-cm well ponetrates 30 m below static water level (GWT). After a long period of pumping at a rate of 1800 Ipm, the drawdowns in the observation wells at 12 m and 36 m from the pumped well are 1.2 m and 0.5 m, respectively. Determine: (1) (1) the transmissibility of the aquifer. the drawdown in the pumped well assuming R = 300 m. the specific capacity of the well
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 ?
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?
A 30 cm diameter well completely 15 points penetrates a confined aquifer of permeability of 45 m/day. The thickness of the aquifer is 20 m. Under steady state of pumping the drawdown at the well found to be 3.0 m and the radius of influence was 300 m. Calculate the discharge of the well * Pumping well dia = 2r + Original piezometric surface Piezometric surface under pumping Aquiclude Flow Confined aquifer Aquiclude Well Operating in a Confined Aquifer 1.548 m^3/min 0.0258 m^3/min 0.258 m^3/min 0.0851 m^3/min
Flow in Wells 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 lpm 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. Estimate the coefficient of permeability and transmissibility of the aquifer. What is the drawdown at the pumping well? *lpm = liters per minute *h = H - s, where H = saturated depth
3. A well with diameter of 42cm fully penetrates 32m below the static water table. After 24 hours of pumping at a rate of 6m³/min, the water level in pumped well is dropped by 12.5m. If the distance from the center of the main well to the point in the aquifer where the draw down becomes zero is 250m: Determine A. Specific capacity of the well B. Transmissibility C. Find the discharge of the main well if it penetrates the well partially (16m below the water table). D. The percentage increase/decrease in the yield of the well because of partial penetration
A 400 mm diameter test well penetrates 27 m below the static water table. After 24 hours of pumping at 75 liters/sec. the water level in an observation well at a distance of 100 m from the test well is lowered 0.35 m. The other observation well at a distance of 40m from the test well has a drawdown of 0.97 m. Compute the transmissibility of the aquifer in m2/day.
A fully penetrating well with diameter of 0.25 m is bored into an unconfined aquifer with hydraulic conductivity of 22 m/d and porosity of 0.3. The water table is initially at a height of 55 m above the bottom of the aquifer. After continuous pumping, a steady state drawdown of 12 m is reached. (a) If the pumping rate has no effect on the water table at a distance of 1.2 km from the pumping well, determine the pumping rate. Determine the drawdown in an observation well 600 m away from the pumping well. Determine the travel time from the observation well to the pumping well.
A pump out test is carried out in a perforated well of 30 cm in diameter, extending into an impervious zone, and through an aquifer 17 m thick from the ground surface. The phreatic line is at 4 m below ground-surface level. After 24 hours of continuously pumping water out of the well, equilibrium has been reached. The discharge of the pump is 5.4 cu.m/hr and the drawdown is 4 m. The radius of influence R was estimated to be 15 m. Determine the average coefficient of permeability of the soil.
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

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