In laboratory analyses of the Larabee soil from north-western California, ash leachate flocculated the clay fractions. As a result, the soil quickly settled out of suspension. To test the hypothesis that field plots on disturbed areas treated with ash leachate would be more resistant to erosion…
Keywords: fire, surface erosion, ash, rainfall simulator, soil structure, flocculation, skid trails
Source: Res. Note PSW-RN-342. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p
The three questions of primary concern for this review are: 1) are the WDNR modules adequately and validly modified to suit local conditions, as required by the HCP/SYP? 2) is there an adequate "distinct cumulative effects assessment" method, as required by the HCP/SYP? 3) will the cumulative…
Keywords: PSW4351, watershed analysis, surface erosion, hydrology, riparian function, channel, fish, cumulative effects
Source: Unpublished review prepared for the National Marine Fisheries Service. USDA Forest Service, Pacific Southwest Research Station, Redwood Sciences Laboratory, Arcata, California. 68 p.
Accelerated erosion commonly occurs after wildfires on forested lands. As burned areas recover, erosion returns towards prefire rates depending on many site-specific characteristics, including fire severity, vegetation type, soil type and climate. In some areas, erosion recovery can be rapid,…
Keywords: cumulative effects, fire recovery, fuel treatments, prescribed burn, surface erosion
Source: International Journal of Wildland Fire. 19(4): 478-489
This paper presents results of a 3 year pilot study of surface erosion on forest roads in the Jackson Demonstration State Forest in California’s coastal redwood region. Ten road segments representing a range of surface, grade, and ditch conditions were selected for the study. At each segment,…
Keywords: Forest roads, surface erosion, coarse sediment, suspended sediment, runoff
Source: In: Standiford, Richard B.; Weller, Theodore J.; Piirto, Douglas D.; Stuart, John D., tech. coords. Proceedings of coast redwood forests in a changing California: A symposium for scientists and managers. Gen. Tech. Rep. PSW-GTR-238. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 13-21
Presents the expected reduction in surface erosion from selected treatments applied to forest road traveledways, cutslopes, fillslopes, and ditches. Estimated erosion reduction is expressed as functions of ground cover, slope gradient, and soil properties whenever possible. A procedure is provided…
Keywords: surface erosion, erosion reduction, forest roads
Source: Gen. Tech. Rep. INT-264. Ogden, UT: U.S. Department of Agriculture, Forest Service, lntermountain Research Station. 21 p.
A negative exponential equation containing three parameters was derived to describe time trends in surface erosion on severely disturbed soils. Data from four different studies of surface erosion on roads constructed from the granitic materials found in the Idaho Batholith were used to develop…
Keywords: surface erosion, vegetation, erosion energy, erodibility index, disturbed soil, soil erosion
Source: Res. Pap. INT-156. Ogden, UT: U.S. Department of Agriculture, Intermountain Forest and Range Experiment Station. 14 p.
Two types of small (30-cm aperture) sheet metal sediment traps were developed to monitor onslope surface sediment transport. Traditionally, sediment traps and erosion pins have been used to measure the onslope movement of surficial soil material. While pins may be appropriate for documenting…
Keywords: erosion measurement, sediment traps, surface erosion, hillslope erosion
Source: Res. Note PSW-RN-393. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p
Soil erosion has significant implications for land productivity and surface water quality, as sediment is the leading water pollutant worldwide. Here, erosion processes are defined. The dominant factors influencing soil erosion in humid areas are reviewed, with an emphasis on the roles of…
Keywords: best management practices, erosion control, forest, precipitation, sediment, surface erosion, water quality, watershed management
Source: Journal of Contemporary Water Research & Education. 154: 48-59.