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    • PHREEQC files to produce geochemical modeling results in the Heart River Basin, North Dakota, 1970-2020

    Metadata Updated: October 29, 2025

    This child page contains a zipped folder which contains all items necessary to run geochemical models and produce results published in U.S. Geological Scientific Investigations Report 2021–XXXX [Tatge, W.S., Nustad, R.A., and Galloway, J.M., 2021, Evaluation of Salinity and Nutrient Conditions in the Heart River Basin, North Dakota, 1970-2020: U.S. Geological Survey Scientific Investigations Report 2021-XXXX, XX p.]. The main folder contains a readme.txt and a file called allsiteinfo.table.csv that can be used to learn how to use the files and reference sites to the main report. Also the main folder contains two folders Model Zone 1 and 2 which include a .pqi, .pqo, and .txt files that can be used to run the models and reproduce results from the main report. PHREEQC is a publicly available software for geochemical modeling. The software can be downloaded at https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqci/. An accompanying report (Parkhurst and Appelo, 2013) serves as the formal documentation for PHREEQC. Parkhurst, D.L., and Appelo, C.A.J., 2013, Description of input and examples for PHREEQC version 3—A computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations: U.S. Geological Survey Techniques and Methods, book 6, chap. A43, 497 p., available only at http://pubs.usgs.gov/tm/06/a43/. Copy of the readme.txt is as follows: USING THE PHREEQC INPUT FILES Software needed: PHREEQC Interactive 3.4 or newer to run the models [https://wwwbrr.cr.usgs.gov/projects/GWC_coupled/phreeqci/] Text reader Description of the files included: MZX_YYYY_YYYY.pqi <- PHREEQC input file indicating the model zone and range of years MZX_YYYY_YYYY.pqo <- PHREEQC output file indicating the model zone and range of years MZX_YYYY_YYYY_input.txt <- Text document of the input data MZX_YYYY_YYYY_output.txt <- Text document of the output data Run the PHREEQC models 1. Download PHREEQC Interactive 2. Open the .pqi file in PHREEQC Interactive 3. Select the default database for PHREEQC Interactive 4. Press "Run" on the top ribbon 5. Evaluate the output of the model View the PHREEQC output files 1. Download PHREEQC Interactive 2. Open the .pqo file in PHREEQC Interactive 3. View the output file OR 1. Open the _output.txt file with a text reader

    Access & Use Information

    Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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    Dates

    Metadata Created Date September 13, 2025
    Metadata Updated Date October 29, 2025

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 13, 2025
    Metadata Updated Date October 29, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-615cc428d34e7b019242b93b
    Data Last Modified 2022-03-14T00:00:00Z
    Category geospatial
    Public Access Level public
    Bureau Code 010:12
    Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
    Metadata Catalog ID https://ddi.doi.gov/usgs-data.json
    Schema Version https://project-open-data.cio.gov/v1.1/schema
    Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
    Harvest Object Id c086c8d8-0a55-48b3-b394-1eb34f7df914
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -103.21929931588, 46.376952348177, -100.78582763629, 47.103486054421
    Source Datajson Identifier True
    Source Hash 259a18750b1067fc82cb6dad3c70605ef6507996cb5f98dd793cf738489374fc
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -103.21929931588, 46.376952348177, -103.21929931588, 47.103486054421, -100.78582763629, 47.103486054421, -100.78582763629, 46.376952348177, -103.21929931588, 46.376952348177}

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