Abstract
 Analysis of Forest Road Sediment Production and Stream Impacts Track: Water Resources Author(s): Ajay Prasad, Charles Luce, David Tarboton, Thomas Black A set of GIS tools has been developed to analyze sediment production from forest roads and the impacts of forest roads on streams, considering both sediment inputs and fish passage barriers. Sediment production for each road segment is calculated from slope, length, road surface condition, and road side drain vegetation gathered by a GPS inventory and by overlaying the road path on a Digital Elevation Model (DEM). Sediment production is accumulated at each drain point by adding the sediment production from contributing road segments. These drain point sediment loadings are then used in a DEM weighted flow accumulation function to calculate sediment load inputs to streams. Inventory information on the fish passage status of stream crossings is used to demarcate contiguous clusters of stream habitat and assess the impact of fish passage barriers on the extent of habitat. A geodatabase model relates connected road, drain point, and stream feature classes. Ajay Prasad Utah State University Civil and Environmental Engineering 4110 Old Main Hill Logan , UT 84322 US Phone: 4357972927 E-mail: ajayprasad@cc.usu.edu Charles Luce USDA Forest Service Boise Aquatic Sciences Laboratory 316 E. Myrtle St. Boise , ID 83702 US Phone: 208 373-4382 E-mail: cluce@fs.fed.us David Tarboton Utah State University Civil and Environmental Engineering 4110 Old Main Hill Logan , UT 84322 US Phone: 435 797 3172 E-mail: dtarb@cc.usu.edu Thomas Black USDA Forest Service Boise Aquatic Sciences Laboratory 316 E. Myrtle St. Boise , ID 83702 US Phone: 208 373-4363 E-mail: tblack@fs.fed.us |
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