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    Author(s): George J. Holcomb; Philip B. Durgin
    Date: 1979
    Source: Res. Note PSW-RN-342. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (154 KB)

    Description

    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 than nontreated plots, a study was done in July and August 1978, on two skid trails on the Humboldt State University Forest near Freshwater, in northwestern California. A rainfall simulator was used to measure differential erosion rates. Ash-leachate treated plots had 36 percent less erosion than nontreated plots. Differences in total sediment yield were statistically significant at the 97.5 percent level of confidence, as shown by a paired t-test of seven plots.

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    Citation

    Holcomb, George J.; Durgin, Philip B. 1979. Ash Leachate Can Reduce Surface Erosion. Res. Note PSW-RN-342. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

    Keywords

    fire, surface erosion, ash, rainfall simulator, soil structure, flocculation, skid trails

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