Rocky Mountain Research Station Publications

RMRS Online Publication
RMRS-RP-77: Three years of hillslope sediment yields following the Valley Complex fires, western Montana


Robichaud, Peter R.; Wagenbrenner, Joseph W.; Brown, Robert E.; Spigel, Kevin M. 2009. Three years of hillslope sediment yields following the Valley Complex fires, western Montana. Res. Pap. RMRS-RP-77. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 8 p.

The 2000 Bitterroot Valley wildfires provided an opportunity to measure post-fire effects and recovery rates. We established 24 small (0.01 ha [0.02 acre]) plots in four high-severity burn sites. We measured sediment yields at each site with silt fences. We also measured rainfall characteristics, soil water repellency, vegetative cover, and other site characteristics. The median sediment yield in post-fire year 1 was 8 Mg ha-1 yr -1 (3.6 ton acre-1 yr -1), and values ranged from 0.3 to 47 Mg ha-1 yr -1 (0.1 to 21 ton acre-1 yr -1). Sediment yields were lower in post-fire years 2 and 3, with medians of 2 and 0.3 Mg ha-1 yr -1 (0.9 and 0.1 ton acre-1 yr -1), respectively. The high variability in sediment yields was related to 10-minute maximum rainfall intensity (I10), but not to soil water repellency or vegetative cover. The results of this study may assist in decisions about post-wildfire land management.

Keywords: erosion, rainfall intensity, soil water repellency, vegetative recovery, post-fire


About PDFs: For best results, do not open the PDF in your Web browser. Right-click on the PDF link to download the PDF file directly to your computer. Click here for more PDF help or order a printed copy of this publication.


Download RMRS-RP-77:
http://www.fs.fed.us/rm/pubs/rmrs_rp077.pdf

PDF File Size: 830 K


Title: RMRS-RP-77: Three years of hillslope sediment yields following the Valley Complex fires, western Montana
Electronic Publish Date: August 31, 2009
Expires: Indefinite
Last Update:
August 31, 2009

RMRS Publications | Order a publication | Contact Us