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Simulation of Cylindrical Flow to a Well Using the U.S. Geological Survey Modular Finite‐Difference Ground‐Water Flow Model
Author(s) -
Reilly Thomas E.,
Harbaugh Arien W.
Publication year - 1993
Publication title -
groundwater
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.84
H-Index - 94
eISSN - 1745-6584
pISSN - 0017-467X
DOI - 10.1111/j.1745-6584.1993.tb01851.x
Subject(s) - rotational symmetry , flow (mathematics) , finite difference , conceptualization , modular design , hydraulics , aquifer , preprocessor , computer science , geology , mechanics , geotechnical engineering , groundwater , engineering , mathematics , physics , mathematical analysis , aerospace engineering , artificial intelligence , operating system
Cylindrical (axasymmetric) flow to a well is an important specialized topic of ground‐water hydraulics and has been applied by many investigators to determine aquifer properties and determine heads and flows in the vicinity of the well. A recent modification to the U.S. Geological Survey Modular Three‐Dimensional Finite‐Difference Ground‐Water Flow Model provides the opportunity to simulate axisymmetric flow to a well. The theory involves the conceptualization of a system of concentric shells that are capable of reproducing the large variations in gradient in the vicinity of the well by decreasing their area in the direction of the well. The computer program presented serves as a preprocessor to the U.S. Geological Survey model by creating the input data file needed to implement the axisymmetric conceptualization. Data input requirements to this preprocessor are described, and a comparison with a known analytical solution indicates that the model functions appropriately.