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    Author(s): Fred H. Everest; Carl E. McLemore; John F. Ward
    Date: 1980
    Source: Res. Note PNW-RN-350. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 8 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (551 KB)

    Description

    The tri-tube cryogenic gravel sampler has been improved, and accessories have been developed that increase its reliability and safety of operation, reduce core extraction time, and allow accurate partitioning of cores into subsamples. The improved tri-tube sampler is one of the most versatile and efficient substrate sampling tools yet developed.

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Everest, Fred H.; McLemore, Carl E.; Ward, John F. 1980. An improved tri-tube cryogenic gravel sampler. Res. Note PNW-RN-350. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 8 p

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    Keywords

    Forestry equipment, stream environment, sedimentation

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