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Pacific Southwest Research Station
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Albany, CA 94710-0011
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Title: Ash Leachate Can Reduce Surface Erosion
Author: Holcomb, George J.; Durgin, Philip B.
Source: Res. Note PSW-RN-342. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p
Station ID: RN-PSW-342
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.
Key Words: fire, surface erosion, ash, rainfall simulator, soil structure, flocculation, skid trails
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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.
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