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; Steven C. [Inventors] Hankin
    Date: 1987
    Source: U.S. Patent 4,660,422. 28 April 1987 9 p. Int. Cl. G01N 1/44.
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (150 KB)


    Abstract - A programmable calculator is connected to a pumping sampler by an interface circuit board. The calculator has a sediment sampling program stored therein and includes a timer to periodically wake up the calculator. Sediment collection is controlled by a Selection At List Time (SALT) scheme in which the probability of taking a sample is proportional to its estimated contribution to total sediment discharge, or according to accumulated predicted sediment weight. Stage height is also measured and is recorded according to a set scheme.

    Publication Notes

    • You may send email to 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.


    Eads, Rand E.; Boolootian, Mark R.; Hankin, Steven C. [Inventors] 1987. Means and method of sampling flow related variables from a waterway in an accurate manner using a programmable calculator. U.S. Patent 4,660,422. 28 April 1987 9 p. Int. Cl. G01N 1/44.


    PSW4351, Caspar Creek, programmable calculator, pumping sampler, sediment, SALT

    Related Search

    XML: View XML
Show More
Show Fewer
Jump to Top of Page