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A New Streamflow-Routing (SFR1) Package to Simulate Stream-Aquifer Interaction with MODFLOW-2000

By David E. Prudic, Leonard F. Konikow, and Edward R. Banta

Report availability: Portable Document Format (PDF).


A new Streamflow-Routing (SFR1) Package was written for use with the U.S. Geological Survey (USGS) MODFLOW-2000 ground-water model and the Ground-Water Transport (GWT) Process in MODFLOW (MODFLOW-GWT). The package replaces an older Stream (STR1) Package that was written for earlier versions of MODFLOW. The SFR1 Package is designed to simulate stream-aquifer interactions and to route flow and a single solute through a network of surface-water channels. The new version offers improved efficiency in the input of data and offers more options in computing stream depth and width. 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
333 West Nye Lane, Room 203
Carson City, Nevada 89706
Attention: David E. Prudic

Although the computer program has been 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-2000, the SFR1 Package, MODFLOW-GWT, and other ground-water programs are available from the USGS at the following World Wide Web (WWW) addresses:
or by anonymous ftp file transfer from directory /pub/software/ground_water/modflow at Internet address:

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