Title: New procedure for sampling infiltration to assess post-fire soil water repellency
Author: Robichaud, P. R.; Lewis, S. A.; Ashmun, L. E.;
Source: Res. Note. RMRS-RN-33. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 14 p.
Publication Series: Research Note (RN)
Description: The Mini-disk Infiltrometer has been adapted for use as a field test of post-fire infiltration and soil water repellency. Although the Water Drop Penetration Time (WDPT) test is the common field test for soil water repellency, the Mini-disk Infiltrometer (MDI) test takes less time, is less subjective, and provides a relative infiltration rate. For each test, the porous base plate of the MDI is placed on the soil surface and the amount of water that passes into the soil in one minute is measured.
Thousands of paired WDPT and MDI tests were applied at burned sites throughout the western United States, and the data were significantly correlated (r = 0.64). A classification tree analysis was used to group the MDI test results into "degree of soil water repellency" categories (strong, weak, and none) that correspond to similar categories established for the WDPT test. Fire-induced soil water repellency has high spatial variability and requires a valid sampling method if the data are to be credible. The MDI test protocol and sampling method described in this Research Note were developed for post-fire assessment, and provide a practical evaluation of burned soil infiltration characteristics in a limited time.
Keywords: post-fire soil water repellency, Mini-disk Infiltrometer (MDI), Water Drop Penetration Time (WDPT)
- 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.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)
XML: View XML
Robichaud, P. R.; Lewis, S. A.; Ashmun, L. E. 2008. New procedure for sampling infiltration to assess post-fire soil water repellency. Res. Note. RMRS-RN-33. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 14 p.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility