Article Estimated Sediment Protection Efficiences for Increasing Levels of Best Management Practices on Forest Harvests in the Piedmont, USA Richard Cristan 1, W. Michael Aust 2,*, M. Chad Bolding 2 and Scott M. Barrett 2 1 College of Agriculture, Communities, and the Environment, Kentucky State University, Frankfort, KY 40601, USA;
[email protected] 2 Department of Forest Resources and Environmental Conservation, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA;
[email protected] (M.C.B.);
[email protected] (S.M.B.) * Correspondence:
[email protected]; Tel.: +1-540-231-4523 Received: 9 October 2019; Accepted: 1 November 2019; Published: 7 November 2019 Abstract: In-stream watershed level evaluations confirm that application of recommended forestry best management practices (BMPs) can minimize sedimentation following management, while on-site erosion research shows that BMPs reduce erosion from individual forest operations, thus implying watershed-level sediment reductions. Assessments of forest operations and sediment have developed very few sediment delivery ratios (SDR). Linking BMP levels (low, standard recommendation, high) within specific forest operations to sedimentation could enable managers to evaluate BMP effects. Reported data regarding forest operations, erosion rates and SDR by forest operation, and BMP implementation levels were sufficient within the Piedmont region to allow approximations of sediment delivery and BMP efficiency. Existing United States Department of Agriculture (USDA) Forest Service reports and published erosion and sediment research were used to comprise the 1 following method. For regional annual harvests, estimated sediment deliveries (Mg year− ) = annual harvest area (ha year 1) weighted average erosion rate from all forest operations (Mg ha 1 year 1) − × − − SDR (unitless ratio).