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    • Hydrograph Separation of Selected Continuous Discharge Sites in the Colombia Plateau Region of the Pacific Northwest

    Metadata Updated: October 29, 2025

    This data release contains the results from hydrograph separation analysis for 44 separate sites within the Columbia Plateau region of the Pacific Northwest. The hydrograph separation program (HYSEP) (Sloto and Crouse, 1996) was used to perform baseflow separation. HYSEP is an automated approach to traditional graphical hydrograph separation methods and was utilized for this study. For the steady-state datasets a single average is provided for each of the individual streamgages. For the transient datasets, a monthly average is provided for each streamgage for the month-year pair when the gage is active. If a streamgage is missing more than 25% of the daily values for the month it is excluded from the record. Additional data subsets are provided for steady-state and transient simulations where average values for sites with available data between 2000-2007 and post 1980 for the transient simulation.

    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 September 12, 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 12, 2025
    Metadata Updated Date October 29, 2025
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/usgs-66ba9cd7d34e03388280ef2e
    Data Last Modified 2024-09-27T00:00:00Z
    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 c757c06c-6715-48f8-9851-dfb83132f518
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial -122.5600, 45.4600, -117.4300, 48.8600
    Source Datajson Identifier True
    Source Hash 19c06c397133ea6031e45b6b3e87b57934e45437711f1b7f4fd6d15752e301cd
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -122.5600, 45.4600, -122.5600, 48.8600, -117.4300, 48.8600, -117.4300, 45.4600, -122.5600, 45.4600}

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