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): L.M. Stahr; D.E. Eisenhauer; M.J. Helmers; Mike G. Dosskey; T.G. Franti
    Date: 2004
    Source: Proceedings: 2004 ASAE/CSAE Annual International MEeting: p. 1-14
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (1.33 MB)

    Description

    Riparian buffers can improve surface water quality by filtering contaminants from runoff before they enter streams. Infiltration is an important process in riparian buffers. Computer models are often used to assess the performance of riparian buffers. Accurate prediction of infiltration by these models is dependent upon accurate estimates of infiltration parameters. Of particular interest here are Green-Ampt infiltraiton parameters, satiated hydraulic conductivity (Ko) and wetting front suction (hf). The objectives of this research were to (i) modify the Smith sorptivity procedure so that it can be used to estimate Green-Ampt infiltration parameters, (ii) Determine the relative closeness of Ko estimated by the inverse sorptivity and inverse Green-Ampt proceedures and hf estimated by Rawls and Brakensiek (1985) to the laboratory-determined standards and (iii) compare Ko estimates of the inverse sorptivity and inverse Greem-Ampt procedures to those estimated by pedotransfer functions. This project was conducted at six sites in Nebraska, at which soil type and land use varied. The results of this study suggest that the inverse Green-Ampt procedure can be used to provide Ko estimates, even in the presence of macropores. Generally, pedotransfer function predictions did not estimate Ko well. Finally, hf as predicted by pedotransfer function was lower than laboratory-determined hf. These predicted infiltration parameters were used in the Green-Ampt infiltration equation to illustrate their effect on cumulative infiltration. Cumulative infiltration based on the inverse Green-Ampt procedure parameters resutled in the closest match to cumulative infiltration prediction from laboratory-based infiltration parameters at five of the six sites.

    Publication Notes

    • You may send email to rmrspubrequest@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

    Stahr, L.M.; Eisenhauer, D.E.; Helmers, M.J.; Dosskey, Mike G.; Franti, T.G. 2004. Green-ampt infiltration parameters in riparian buffers. Proceedings: 2004 ASAE/CSAE Annual International MEeting: p. 1-14

    Keywords

    buffers, Green-Ampt, infiltration, infiltration parameters, macropores

    Related Search


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