TRACING SUBSURFACE FLOW ON ROADCUTS ON STEEP, FORESTED SLOPES

In situ hydraulic conductivity was determined in a forested soil in the Idaho batholith by a tracer technique, and values were compared to hydraulic conductivity determined in the laboratory on cored samples. Hydraulic conductivity values determined with the NaCl tracer averaged an order of magnitude greater than laboratory derived values. This is likely due to rapid flow in macropores formed from root channels or other biological activity that cannot be sampled by conventional coring and laboratory conductivity tests. An evaluation of the Reynold's number for the test conditions indicated Darcy flow was occurring.

  • Corporate Authors:

    Soil Science Society of America

    677 South Segoe Road
    Madison, WI  United States  53711
  • Authors:
    • Megahan, W F
    • Clayton, J L
  • Conference:
  • Publication Date: 1983-11

Media Info

  • Features: References;
  • Pagination: p. 1063-67
  • Serial:
    • Volume: 47
    • Issue Number: 6

Subject/Index Terms

Filing Info

  • Accession Number: 00385861
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 28 1984 12:00AM