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PHREEQC files for geochemical simulations in Horn Creek, Grand Canyon, AZ

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2023-06-30T00:00:00Z
PHREEQC files included in this ScienceBase product were used to interpret changes in water quality within the Horn Creek watershed of Grand Canyon for the associated publication. PHREEQC is a publicly available software for geochemical modeling and the software can be downloaded at https://www.usgs.gov/software/phreeqc-version-3. An accompanying report (Parkhurst and Appelo, 2013) serves as the formal documentation for PHREEQC.The wateq4f database (Ball and Nordstrom, 1991) was used, without modification, for the PHREEQC simulation. Text files of the input and output information from PHREEQC are included to document information without needing the PHREEQC program.

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