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USGS in Your State

USGS Water Science Centers are located in each state.

PART: A computerized method of base-flow-record estimation

This web site includes information about the use of the PART computer program for analyzing a streamflow record. The version at this site will read streamflow data in the format that is available from USGS web sites.

The computer program PART uses streamflow partitioning to estimate a daily record of groundwater discharge under the streamflow record. The method designates groundwater discharge to be equal to streamflow on days that fit a requirement of antecedent recession, linearly interpolates groundwater discharge for other days, and is applied to a long period of record to obtain an estimate of the mean rate of groundwater discharge.

PART Downloads

• PART version 2.0 software, documentation, and sample data sets (1.3MB EXE ), updated March 2012
• README file describing files included in EXE file, including a version history

Background Literature

• PART is described in two documents:
  • the original USGS report (USGS WRIR 98-4148) describing the theory and implementation details of the software, and
  • a user's manual (50KB PDF) that demonstrates use of the program with the sample data sets.
• Obtaining streamflow data from a USGS web site.
• USGS Groundwater and Surface-Water Interactions web site.

Point of Contact

Comments about this site can be sent to Paul Barlow.

Other USGS Groundwater Software

The USGS develops groundwater , water-quality, surface-water, and other water-resources software for use by the USGS in fulfilling its mission. Most of this software is available online for download at no charge.

Disclaimers and Notices

Please refer to the USGS Software User Rights Notice for complete use, copyright, and distribution information. The USGS provides no warranty, expressed or implied, as to the correctness of the furnished software or the suitability for any purpose. The software has been tested, but as with any complex software, there could be undetected errors. Users who find errors are requested to report them to the USGS.

References to non-USGS products, trade names, and (or) services are provided for information purposes only and do not constitute endorsement or warranty, express or implied, by the USGS, U.S. Department of Interior, or U.S. Government, as to their suitability, content, usefulness, functioning, completeness, or accuracy.

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