Sediment delivery ratios from forest road networks and harvesting operational features by physiographic region in the southeastern United States

Celeste N. Horton, enforcement specialist, Virginia Department of Environmental Quality, Valley Regional Office, Harrisonburg, Virginia. Scott M. Barrett (corresponding author), associate professor and extension specialist, Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia. W. Michael Aust, Garland Gray Professor, Department of Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, Virginia. Brent S. Hawks, forest hydrologist, Weyerhaeuser, Vanceboro, North Carolina. M. Chad Bolding, professor and Langdale Endowed Chair in forest business, Warnell School of Forestry and Natural Resources, University of Georgia, Athens, Georgia.