| CAPZONE Capture Zone Analysis |
Order No: BAS 30 |
CAPZONE is an analytical flow model that can be used to construct ground-water flow models of two-dimensional flow systems characterized by isotropic and homogeneous confined, leaky-confined, or unconfined flow conditions. CAPZONE computes drawdowns at the intersections of a regularly-spaced rectangular grid produced by up to 100 wells using either the Theis equation or the Hantush-Jacob equation. The grid can contain up to 75 rows and columns. Computed drawdowns in unconfined aquifers are corrected for aquifer dewatering using Jacob's correction equation. Computed drawdowns can be subtracted from either regional (nonuniform) water levels stored in a file using the same rectangular grid, or from water levels obtained from an assumed uniform hydraulic gradient. Computed heads and/or drawdowns can be saved in a file format compatible with any x-y-z format contouring program and in formats compatible with any x-y-z or row-col-col format particle-tracking program. Computed heads and/or drawdowns can also be displayed in tabular format to the monitor or sent to a printer.
The program prompts for inputs and builds an input data file which can be edited in the preprocessor. It creates output files compatible with commercial contouring package, or for use in GWPATH for plotting capture zones. CAPZONE does not include GWPATH, which can be obtained from the Illinois State Water Survey. CAPZONE is distributed on a DOS-formatted diskette with executable code and example data sets. The user's manual consists of installation instructions and the program documentation. Field-data requirements, analytical methods, and procedures for constructing a calibrated ground-water flow model using CAPZONE and delineating travel time-related capture zones using GWPATH are presented in this manual and are demonstrated in a well-documented work session.
SYSTEM REQUIREMENTS
Developers: E. Scott Bair, A.E. Springer, and G.S. Roadcap (Ohio State University)