A confined aquifer of 10-m thickness and 16.43 m/day hydraulic conductivity is fullypenetrated by a pumping well of 0.5 m radius operating at Q = 425 m3/day. Determine thedrawdown (Sw) under steady-state conditions in the pumping well and 50 m away from thewell. Take the radius of influence of the pumping as 300 m.

Lets solve this groundwater problem using the Thiem equation for steady-state flow in a confined…

Answered: A confined aquifer of 10-m thickness…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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4. A confined aquifer of 10-m thickness and 16.43 m/day hydraulic conductivity is fully penetrate by a pumping well of 0.5 m radius operating at Q=425 m³/day. Determine the drawdown under steady-state conditions in a) the pumping well and b) 50 m away from the well. Take the radius of influence of the pumping well as 300 m.
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 45 cm well in an unconditioned aquifer of saturated thickness (40+8) m yields (600+10(2) lpm under a drawdown of 4m at the pumping well. Assuming radius of influence of (500+10(3)m, a. what is the hydraulic conductivity of the aquifer in m/day? b. what will be the drawdown 200 m from the well? c. what will be the piezometric head 400 m from the well
Determine the drawdown at a distance of 50 m from a well pumping constantly at 50 US gpm after one year of pumping. The confined aquifer saturated thickness is 12 m, the hydraulic conductivity is 0.004 cm/s, and the storativity is 0.0004.
(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
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
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
Consider a confined aquifer with a thickness of 12 m and hydraulic conductivity of 20 m/day. This aquifer is fully penetrated by a pumping well having a radius of 0.4 m and is operating at a discharge of 550 m3/day. Calculate the drawdown under steady-state condition in the pumping well and at a point located 41 m away from the well. Assume the radius of influence of the pumping is 310 m.
Q- A tube-well of 20 cm diameter fully penetrates a horizontal, homogeneous and isotropic confined aquifer of infinite horizontal extent. The aquifer is of 30 m uniform thickness. A steady pumping at the rate of 40 litres/s from the well for a long time results in a steady drawdown of 4 m at the well face. The subsurface flow to the well due to pumping is steady, horizontal and Darcian and the radius of influence of the well is 245 m. Find the hydraulic conductivity of the aquifer (in m/day).
a 45-cm well in an unconfined aquifer of saturated thickness of 48 m yields 701 lpm (liters per minute) under a drawdown of 4m at the pumping well. Assuming a radius of influence of 605 m, a. what is the hydraulic conductivity of the aquifer, in m/day? b. what will be the drawdown 200m from the well? c. what will be the piezometric head 400m fron the well?
Hydrology engineering Q3. An unconfined aquifer has a thickness of 30m . A fully penetrating 20cm diameter well in this aquifer is pumped at a rate of 35 liter/ sec. . the drawdown measured in two observation wells located at distance of 10m and 100m from the well are 7.5m and 0.5m respectively .Determine the average hydraulic conductivity of the aquifer . At what distance from the well the drawdown is insignificant?
A well of diameter 15 cm pumps at a steady rate of 265 L/min. It is located 15.2 m from a lake shore that is straight. The well and the lake penetrate the same homogeneous isotropic confined aquifer of hydraulic conductivity 2 m/day. At the steady state the influence of a well pumping at the above rate on the aquifer is upto a distance of 50 m from the well. Determine the drop in water level in the well assuming that without the well pumping, the head at the well is essentially the same as the head in the lake

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