An improved tri-tube cryogenic gravel sampler.

Fred H. Everest; Carl E. McLemore; John F. Ward

doi:10.2737/PNW-RN-350

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An improved tri-tube cryogenic gravel sampler.

Informally Refereed

Authors:

Fred H. Everest, Carl E. McLemore, John F. Ward

Year:

1980

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-350

Source:

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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Abstract

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.

Keywords

Forestry equipment, stream environment, sedimentation

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