Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Rand E. Eads; Mark R. Boolootian
    Date: 1985
    Source: Research Note PSW-376. Berkeley, California: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture. 8 p.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (169 KB)

    Description

    A programmable calculator connected to an interface circuit can control automatic samplers and record streamflow data. The circuit converts a voltage representing water stage to a digital signal. The sampling program logs streamflow data when there is a predefined deviation from a linear trend in the water elevation. The calculator estimates suspended sediment discharge from rating coefficients for the gauging site. When a threshold value of accumulated suspecded sediment discharge is reached, the calculator sends a signal to the interface circuit that activates a pumping sampler. The sampling program is easily updated, and data are transferred to a computer by using a digital cassette recorder. This system increases sampling flexibility and efficiency.

    Publication Notes

    • You may send email to psw_communications@fs.fed.us to request a hard copy of this publication.
    • (Please specify exactly which publication you are requesting and your mailing address.)
    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Eads, Rand E.; Boolootian, Mark R. 1985. Controlling suspended sediment samplers by programmable calculator and interface circuitry. Research Note PSW-376. Berkeley, California: Pacific Southwest Forest and Range Experiment Station, Forest Service, U.S. Department of Agriculture. 8 p.

    Keywords

    PSW4351, Caspar Creek, automatic pumping samplers, streamflow, suspended sediment, sampling, water quality, data logger, programmable calculator

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/7758