Reverse Pathline Calculation of Time‐Related Capture Zones in Nonuniform Flow

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Abstract
A simple to understand and easy to implement numerical technique, based on reverse calculation of ground ‐water flow paths, is applied to delineation of time‐related capture zones around water‐supply wells. The areal extent of a t‐year capture zone in a two‐dimensional regional flow domain is approximated by a large set of reverse pathlines all with t‐year travel times. The numerical approach is suitable for calculation of time‐related capture zones in steady, nonuniform flow with inhomogeneous, anisotropic aquifer conditions. The example applications show the sensitivity of this technique to the influence of multiple wells in a block inhomogeneous flow regime.

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