QUESTION 1Calculate the transmissivity of an artesian aquifer that has a thickness of5.5 m and is pumped at a rate of 1.52 m³/min. There are two observationwells located at 150 m and 280 m away withdrawdowns of 0.8 and 0.72 m respectively.(15)QUESTION 2An aquifer has T = 175 m²/day, S = 1.3 x104, and provides a flow of 20L/s to a well. Find the drawdown at the two observation wells located 15and 65 m from the producing well after 1 day, 2months, 10 months and 2 years.(15)

Answered: Image /qna-images/answer/f7de7724-b7e2-4119-b59d-23b7bc291b17.jpg

Answered: Calculate the transmissivity of an…

Engineering

Civil Engineering

Calculate the transmissivity of an artesian aquifer that h

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

I need the answer as soon as possible
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.
o). Suppose an unconfined aquifer lies over a confined aquifer as shown in the figure below. Determine the flow out of both aquifers. 82 m 50 2 Impervious layer K₁-30 m/day K₂=60 m/day 900 GS 75m
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?
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 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
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.
Q-7 In a homogeneous unconfined aquifer of area 3.00 km², the water table was at an elevation of 102.00 m. After a natural recharge of volume 0.90 million cubic meter (Mm³), the water table rose to 103.20 m. After this recharge, ground water pumping took place and the water table dropped down to 101.20 m. The volume of ground water pumped after the natural recharge, expressed (in Mm³ and round off to two).
9 Determine permeability of the aquifer if a steady discharge of 30 at the well face. Take radius of influence A tube well of 15 cm diameter penetrates fully an artesian aquifer 27 m thick. lps is obtained from the well under a drawdown of 3.0 m equal to 200 m.
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.
Q3. A 200 mm diameter well which fully penetrating a confined aquifer of thickness 25 m is pumped at a constant rate of 2000 m3/day. The steady state drawdown in the well is 8 m and the drawdown in a piezometer 100 m from the well is 1.4 m.(a) Ignoring well losses, calculate the transmissivity of the aquifer, the hydraulic conductivity of the aquifer material and the radius of influence of the well.(b) Repeat the calculation for an unconfined aquifer with saturated thickness 25 m
. 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.