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Forestry Sciences Laboratory - Moscow, Idaho
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Soil & Water
Engineering Publications


Project Leader:
William J. Elliot
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Infiltration characteristics of forest road filter windrows

Foltz, R.B.; Elliot, W.J. 2001. Infiltration characteristics of forest road filter windrows Presented January 3-5, 2000, Honolulu, HI. In: Ascough II, J.C.; Flanagan, D.C., eds. Soil erosion for the 21st century: proceedings of the international symposium. St. Joseph, MI: ASAE. ASAE Pub. No. 701P0007.

Keywords: Filter windrows, Hydrophobic conditions, Hydraulic conductivity, WEPP, infiltration, road

Links: pdf PDF [98k]


Abstract: A study to determine the infiltration parameters for filter windrows was undertaken. The study used a flow rate representing the runoff from a forest road of 100 m length during a storm of 50 mm/hr. Observations during the flow event suggested a hydrophobic-like condition existed for up to 10 minutes. The hydraulic conductivity required by the WEPP model to reproduce the field results ranged from 80 to 200 mm/hr in the filter windrow and from 60 to 1400 mm/hr in the forest floor. While the 1400 mm/hr value appeared to be due to macropores, hydraulic conductivity values of 400 mm/hr for the forest floor were required for proper WEPP simulation. These values will be incorporated in the U.S. Forest Service WEPP Road interface.

Moscow FSL publication no. 2001h