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COOPER-JACOB CALCULATOR
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Cooper and
Jacob (1946) developed an approximation for the Theis equation and a
data analysis method which does not require type-curve matching. The
Cooper-Jacob calculator presented here estimates the drawdown for a
given well location over time. This calculator is good for
anticipating results from pump tests. The Cooper-Jacob
approximation is given by:
There are
many programs available for analyzing pump test results, including
AquiferTest.
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There are many resources
available for more information on the Cooper-Jacob approximation For this
newsletter the following textbooks were used:
Batu, V. (1998). Aquifer
Hydraulics; A Comprehensive Guide to Hydrogeologic Data Analysis.
Published by John Wiley & Sons, Inc. New York, NY.
Schwartz, F.W. and Zhang,
H. (2003). Fundamentals of Groundwater. Published by John
Wiley & Sons, Inc. New York, NY.
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AquiferTest v4.0 is the
latest software technology for graphical analysis and reporting of
pumping test and slug data. AquiferTest v4.0 represents a major leap
forward in pumping test analysis technology.
With the integration of
derivative analysis capabilities, trends corrections, and data
contouring, you will have the tools to analyze and report your pumping
test data like never before.
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Main Features of AquiferTest v4.0
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Wide
selection of analysis methods
AquiferTest is capable of
analyzing your pump test data with a variety of methods. These
methods includ:
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Project setup features
AquiferTest has a logical GUI
design for easy project creation, data input, analysis and reporting.
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AquiferTest
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Data
analysis features
AquiferTest includes a
revolutionary alternative approach to type curve matching for aquifer
characterization. In addition, new diagnostic graphs for
on-the-fly comparison of field data vs. diagnostic graphs for quick
assessment.
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Data
Entry Features
AquiferTest includes an
intuitive data entry form for fast and easy data entry and editing.
Data entry can also be completed directly from Excel, text and ASCII
files.
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Graphs and Printing Features
AquiferTest can display
colour shading or contour lines of drawdown data on a sitemap, and can
display multiple drawdown or type curves simultaneously, in addition
to many other features.
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