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In June, 1996, six experiments conducted at the U.S. Geological Survey Debris Flow Flume demonstrated that fexible, vertical barriers constructed of wire rope netting can stop small debris flows. All experimental debris flows consisted of water-saturated gravelly sand with less than two percent finer sediment by weight. All debris flows had volumes of about 10 cubic meters, masses of about 20 metric tons, and impact velocities of 5 to 9 meters per second. In four experiments, the debris flow impacted pristine, undeformed barriers of varying design; in the other two experiments, the debris flow impacted barriers already loaded with sediment from
a previous flow.
-- DeNatale, et.al., 1999
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