A Modular Three-Dimensional Finite-Difference Ground-Water Flow Model

U.S. Geological Survey, Techniques of Water-Resources Investigations, Book 6, Chapter A1

by Michael G. McDonald and Arlen W. Harbaugh

TWRI 6-A1 is also available in Chinese.

This report is available as a pdf below:


The series of manuals on techniques describes procedures for planning and executing specialized work in water-resources investigations. The material is grouped under major subject headings called books and further subdivided into sections and chapters. Section A of Book 6 is on ground-water modeling.

Provisional drafts of chapters are distributed to field offices of the U.S. Geological Survey for their use. These drafts are subject to revision because of experience in use or because of advancement in knowledge, techniques, or equipment. After the technique described in a chapter is sufficiently developed, the chapter is published and is for sale by the Books and Open-File Reports Section, US. Geological Survey, Federal Center, Box 25425, Denver, Colorado 80225.

Reference to trade names, commercial products, manufacturers, or distributors in this manual constitutes neither endorsement by the U.S. Geological Survey nor recommendation for use.

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