A paired watershed investigation of clearcut BMPs revisited
Fraser, Noah Eugene
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During the 1970s a paired watershed investigation was conducted on two first order, non-branched streams in the Georgia Piedmont region (B.F. Grant Memorial Forest near Eatonton, GA). It was found that the BMPs of that period did not protect water quality against significant increases in peak flows, suspended sediment, and maximum daily water temperatures. The current study repeated the earlier experiment after the standard thirty-year growing period on the Treatment watershed using current BMPs. In addition, a road crossing on the treatment stream had been eliminated not long after the first experiment and was not present during the repeated experiment. Current BMPs were very effective in reducing the water quality effects observed in the previous experiment in the 1970s. The previously observed peak flow increases were reduced by half, the sediment increases reduced by ninety percent, and daily maximum water temperature effects were completely eliminated.