Abstract
In this study, the effect of vegetation root system on surface erosion was investigated by conducting a series of experiments on slope erosion by artificial rainfall. Both a bare slope of sand and that with various densities of vegetation roots were set in the experiment flume, and oats were used here. As a result, it was found that the amount of eroded sediment from the slope with vegetation was considerably smaller than that from bare slope, and it was also proved that the surface erosion was obviously reduced by the root system. It was also found that the extension of eroded channel network was strongly affected by the arrangement of vegetations.
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