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A modular three-dimensional finite-difference ground-water flow model

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TLDR
A computer program for simulating ground-water flow in three dimensions by using a block-centered finite-difference approach and has a modular structure, which permits the addition of new packages to the program without modifying existing packages.
Abstract
A computer program for simulating ground-water flow in three dimensions is presented. This report includes detailed explanations of physical and mathematical concepts on which the model is developed. Ground-water flow within the aquifer is simulated by using a block-centered finite-difference approach. The program is written in Fortran 77 and has a modular structure, which permits the addition of new packages to the program without modifying existing packages.

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Modeling Coupled Surface-Subsurface Flow Processes: A Review

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Cost-effective long-term groundwater monitoring design using a genetic algorithm and global mass interpolation

TL;DR: In this article, a new methodology for sampling plan design was developed to reduce the costs associated with long-term monitoring of sites with groundwater contamination, which combines a fate-and-transport model, plume interpolation, and a genetic algorithm to identify cost-effective sampling plans that accurately quantify the total mass of dissolved contaminant.
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