The time – drawdown data for a confined aquifer is given below for a discharge of 1500 gpm. The distance of the observation well is 300 ft. here, T=52849.388 ft^2/day and S=0.000568 A.Show that the basic criteria for using Cooper-Jacob approximation is satisfied.  B.For the computed T and S values, what is the limiting value of time ‘t’ that satisfies the basic criteria of well function parameter ‘u’?

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
icon
Related questions
Question

The time – drawdown data for a confined aquifer is given below for a discharge of 1500 gpm. The distance of the observation well is 300 ft.

here, T=52849.388 ft^2/day and S=0.000568

A.Show that the basic criteria for using Cooper-Jacob approximation is satisfied. 

B.For the computed T and S values, what is the limiting value of time ‘t’ that satisfies the basic criteria of well function parameter ‘u’? 

Drawdown (ft)
Time after pumping started
(min)
1
0.45
2
0.74
3
0.91
4.
1.04
6
1.21
1.32
10
1.45
30
2.02
40
2.17
50
2.30
60
2.34
80
2.50
100
2.67
200
2.96
400
3.25
600
3.41
800
3.50
1000
3.60
1440
3.81
Transcribed Image Text:Drawdown (ft) Time after pumping started (min) 1 0.45 2 0.74 3 0.91 4. 1.04 6 1.21 1.32 10 1.45 30 2.02 40 2.17 50 2.30 60 2.34 80 2.50 100 2.67 200 2.96 400 3.25 600 3.41 800 3.50 1000 3.60 1440 3.81
Expert Solution
steps

Step by step

Solved in 5 steps with 1 images

Blurred answer
Knowledge Booster
Groundwater flow
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Structural Analysis
Structural Analysis
Civil Engineering
ISBN:
9781337630931
Author:
KASSIMALI, Aslam.
Publisher:
Cengage,
Structural Analysis (10th Edition)
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Sustainable Energy
Sustainable Energy
Civil Engineering
ISBN:
9781337551663
Author:
DUNLAP, Richard A.
Publisher:
Cengage,
Traffic and Highway Engineering
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning