Using GIS to Analyze Road Features in the Clear Creek Watershed, Idaho
Authors: Ina Miller, Longxi Cao, William Ellliot
In the absence of wildfire, roads are the main source of sediment in most forests. Estimating sediment delivery from roads in a mountainous watershed is challenging, requiring extensive field work or complex GIS modeling. We developed a methodology to use advanced GIS tools and a 10-m DEM to determine road and streamside buffer topography, and from that, to estimate erosion with the WEPP Model for a road network. We tested this new technology on a 150-mile road network (2500 segments) in Idaho.