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    • Experimental Results for Colloidal Borescope Flowmeter

    Metadata Updated: January 20, 2026

    The colloidal borescope flowmeter (HB) used in this testing was developed by AquaVISION, Llc. The instrument employs a charge-coupled device camera, an optical magnification lens (140x), and a light-emitting diode (LED) illumination source to visually track neutrally buoyant colloids (approximately 1-5 microns) moving horizontally through the borehole. The device measured groundwater velocity and flow direction in the x-y (horizontal) plane. The HB magnetometer was checked with a compass to assure proper instrument orientation before deployment into the simulators. Borescope data were collected for each flow condition for a period of at least 30 minutes. After data collection, borescope data were inspected for anomalous periods of record that were caused by disturbances such as a vibration in the laboratory. Anomalous periods were deleted before computing the velocity and flow direction.

    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 January 11, 2026
    Metadata Updated Date January 20, 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 20, 2026
    Publisher U.S. Geological Survey
    Maintainer
    Identifier http://datainventory.doi.gov/id/dataset/USGS_5cc215ade4b09b8c0b74717b
    Data Last Modified 2021-11-22T00:00:00Z
    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 20260120105240
    Harvest Object Id 3fea75fd-fbe4-45a7-a1e0-e35c9483d75d
    Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
    Harvest Source Title DOI USGS DCAT-US
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": -89.631599, 30.361283, -89.631599, 39.875856, -86.265765, 39.875856, -86.265765, 30.361283, -89.631599, 30.361283}
    Source Datajson Identifier True
    Source Hash 3da2f829fb54a9454e58d745fff8c67d76f9d171f25b15edf00558d05a5119b7
    Source Schema Version 1.1
    Spatial {"type": "Polygon", "coordinates": -89.631599, 30.361283, -89.631599, 39.875856, -86.265765, 39.875856, -86.265765, 30.361283, -89.631599, 30.361283}

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