Time-drawdown data collected at a distance of 30 m from a well pumping at a rate of 1000m³/day are as follows. Calculate the transmissivity and the storativity.t, min 1234567 10 2040 80 100 300 500 1000s, m0.03 0.15 0.30 0.39 0.48 0.61 0.72 0.91 1.38 1.91 2.41 2.60 3.45 3.874.39a) Use Theis Methodb) Use modified Theis Method (Cooper-Jacob Method)c) Regenerate the drawdowns value found in (a) and compared with the given data. Computethe root mean square error between the calculated drawdown and observation values.d) Regenerate the drawdowns value found in (b) and compared with the given data.Compute the root mean square error between the calculated drawdown and observationvalues.

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Time-drawdown data collected at a distance of 30 m from a well pumping at a rate of 1000 m³/day are as follows. Calculate the transmissivity and the storativity. t, min 1 2 3 4 5 6 7 10 20 40 80 100 300 500 1000 0.03 0.15 0.30 0.39 0.48 0.61 0.72 0.91 1.38 1.91 2.41 2.60 3.45 3.87 4.39 s, m a) Use Theis Method b) Use modified Theis Method (Cooper-Jacob Method) c) d) Regenerate the drawdowns value found in (a) and compared with the given data. Compute the root mean square error between the calculated drawdown and observation values. Regenerate the drawdowns value found in (b) and compared with the given data. Compute the root mean square error between the calculated drawdown and observation values.

Time-drawdown data collected at a distance of 30 m from a well pumping at a rate of 1000 m³/day are as follows. Calculate the transmissivity and the storativity. t, min 1 2 3 4 5 6 7 10 20 40 80 100 300 500 1000 0.03 0.15 0.30 0.39 0.48 0.61 0.72 0.91 1.38 1.91 2.41 2.60 3.45 3.87 4.39 s, m a) Use Theis Method b) Use modified Theis Method (Cooper-Jacob Method) c) d) Regenerate the drawdowns value found in (a) and compared with the given data. Compute the root mean square error between the calculated drawdown and observation values. Regenerate the drawdowns value found in (b) and compared with the given data. Compute the root mean square error between the calculated drawdown and observation values.

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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Question

Time-drawdown data collected at a distance of 30 m from a well pumping at a rate of 1000
m³/day are as follows. Calculate the transmissivity and the storativity.
t, min 1
2
3
4
5
6
7 10 20
40 80 100 300 500 1000
s, m
0.03 0.15 0.30 0.39 0.48 0.61 0.72 0.91 1.38 1.91 2.41 2.60 3.45 3.87
4.39
a) Use Theis Method
b) Use modified Theis Method (Cooper-Jacob Method)
c) Regenerate the drawdowns value found in (a) and compared with the given data. Compute
the root mean square error between the calculated drawdown and observation values.
d) Regenerate the drawdowns value found in (b) and compared with the given data.
Compute the root mean square error between the calculated drawdown and observation
values.

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