Roads have been shown to alter the hydrologic and geomorphic response of watersheds and can impact aquatic ecosystems and degrade water quality. GRAIP can be applied at a variety of spatial scales, but is well suited to capture the multiple effects of roads at a sub-watershed scale to identify the most critical restoration opportunities.
GRAIP is the Geomorphic Roads Analysis and Inventory Package. It is a simple and free road inventory and modeling tool designed to quantify road impacts on streams and to help land managers efficiently evaluate the multiple aspects of risk created by forest roads.
GRAIP uses a detailed GPS based road inventory to inform fine sediment erosion, shallow landslide and gully modeling tools that run in ArcGIS. The inventory provides information on stream crossing failure and stream diversion risks, information on the amount of road connected to the stream and a census of the road infrastructure and condition. Field crews collect about 2 miles of GRAIP inventory data a day depending on the landscape and access conditions.
GRAIP is a collaborative Joint venture between the U.S. Forest Service Rocky Mountain Research Station and Utah State University. RMRS staff supports GRAIP from the Boise Aquatic Sciences Lab. GRAIP has an active user community that includes partners inside and outside of public land management and regulatory agencies, including: the Environmental Protection Agency, the Bureau of Land Management, the Nez Perce Tribe, the Nature Conservancy, Idaho Department of Environmental Quality, the Southwest Crown of the Continent Collaborative, Coos Watershed Association, Idaho Forest Restoration Partnership, the U.S. Geological Survey, the Wilderness Society, and the Great Northern Landscape Conservation Cooperative.