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    • MODFLOW-NWT model for risk-based decision-support groundwater modeling for the lower San Antonio River Basin, Texas, USA

    Metadata Updated: January 22, 2026

    A MODFLOW-NWT groundwater/surface-water model was developed to evaluate the responses of low-flow conditions and groundwater levels within the lower San Antonio River Basin, Texas, USA under conditions of reduced recharge and increased groundwater withdrawals. There was concern that decreased recharge and increased groundwater withdrawals may adversely affect streamflow and groundwater levels. History-matching was carried out for the historical conditions of 2006-2013 using highly parameterized inversion with PEST++ which produced a maximum a posteriori model parameter set which formed the central tendency of a posterior parameter ensemble using FOSM- based Monte Carlo uncertainty analysis. The ensembles were also created for two scenarios of 25% reduced recharge and 1% increased groundwater withdrawals or 25% increased groundwater withdrawals.

    This USGS data release contains all of the input and output files for the simulations described in the associated journal article (https://doi.org/10.1111/gwat.13107).

    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 11, 2026
    Metadata Updated Date January 22, 2026

    Metadata Source

    Harvested from DOI USGS DCAT-US

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Created Date January 11, 2026
    Metadata Updated Date January 22, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_71c148ef-632c-41b1-bb42-ba211ec013b0
    Data Last Modified 2021-05-17T00:00:00Z
    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
    Datagov Dedupe Retained 20260122045119
    Harvest Object Id 551a2df0-ec72-4368-bac0-d68769df1644
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -99.024988, 27.142820, -99.024988, 30.097665, -95.982679, 30.097665, -95.982679, 27.142820, -99.024988, 27.142820}
    Source Datajson Identifier True
    Source Hash dcd34aa11c81a82f723ebb175b32f435b87a0b83855f8906ca6ed80593c3777f
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -99.024988, 27.142820, -99.024988, 30.097665, -95.982679, 30.097665, -95.982679, 27.142820, -99.024988, 27.142820}

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