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    • Baseflow Time Series (ver. 3.0, December 2025)

    Metadata Updated: January 6, 2026

    Daily estimates of baseflow derived from a non-linear, baseflow separation model. The files "baseflow_huc_01_02_03.csv", "baseflow_huc_04_05.csv", "baseflow_huc_06_07_08_09_10.csv", "baseflow_huc_11_12_13_14_15.csv", and "baseflow_huc_16_17_18_19_20_21.csv" have daily baseflow estimates for the period from water year 1981 to 2020 for 11,985 sites. The file "baseflow_rsqa.csv" has daily baseflow estimates for 462 sites that were sampled as part of the US Geological Survey Regional Stream Quality Assessment (RSQA). Values are only provided for days when water samples were collected. Missing values indicate gaps in the streamflow record.

    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.

    Downloads & Resources

    Dates

    Metadata Created Date January 6, 2026
    Metadata Updated Date January 6, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 6, 2026
    Metadata Updated Date January 6, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5f733bbd82cef8d183995970
    Data Last Modified 2025-12-09T00:00:00Z
    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 ecd8e46b-a7ee-49e9-8c70-39d050ad565d
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -180.0000, 15.0000, -50.0000, 75.0000
    Source Datajson Identifier True
    Source Hash d04905840ee18b4ba9ab32101ce98416b84216bfd2e356a176a7d4a5a6d05b9d
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -180.0000, 15.0000, -180.0000, 75.0000, -50.0000, 75.0000, -50.0000, 15.0000, -180.0000, 15.0000}

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