Techniques and Methods 6-A19

Techniques and Methods 6-A19

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A new Unsaturated-Zone Flow (UZF1) Package was written for use with the U.S. Geological Survey (USGS) MODFLOW-2005 ground-water model. The UZF1 Package is designed to simulate percolation through an unsaturated zone between land surface and the water table. The performance of this computer program has been tested in models of hypothetical ground-water flow systems; however, future applications of the programs may reveal errors that were not detected in the test simulations. Users are requested to notify the USGS if errors are found in the documentation report or in the computer program. Correspondence regarding the report or program should be sent to:

U.S. Geological Survey, WRD
2730 North Deer Run Road
Carson City, Nevada 89701
Attention: Richard G. Niswonger or David E. Prudic

Although the computer program has been written and used by the USGS, no warranty, expressed or implied, is made by the USGS or the United States Government as to the accuracy and functionality of the program and related program material. Nor shall the fact of distribution constitute any such warranty, and no responsibility is assumed by the USGS in connection therewith.

MODFLOW-2005, the UZF1 Package, and other ground-water programs are available from the USGS at the following World Wide Web (WWW) address:

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