ISSN:
1745-6584
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Geosciences
Notes:
A classical dimensional analysis of the Theis non-equilibrium radial flow problem in a confined aquifer indicates that three dimensionless parameters are required for its representation. A new set of type curves based on three dimensionless parameters sT/Q, Qt/sr2, and S, is developed that can be employed to analyze aquifer test data by a curve-matching procedure similar to the procedure used at present with two dimensionless variables.The possible advantages of the proposed new type curves are as follows: (1) The concave shape of the type curves along the x-axis and particularly their point of vertical tangency permits curve matching with a minimum of ambiguity. Furthermore, the possibility of gross errors in the curve-matching procedure is reduced because both type curves and the plot of field data use the same dimensionless parameter on the horizontal axis (x-axis) so that the process of curve matching permits movement of the field curve only parallel to the vertical axis (y-axis). (2) The shape of the proposed type curves provides a focus for aquifer-test design-that is, given very approximate estimates for the field parameters (T and S), the investigator can target a specific range for the field-measured parameters for which curve matching will give best possible results.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1745-6584.1987.tb02135.x
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