National Fish Habitat Action Plan (NFHAP) 2010 HCI Scores and Human Disturbance Data for Alaska linked to HUC12s for Alaska

This shapefile contains landscape factors representing potential human disturbances to river systems summarized in 12-digit USGS hydrological units (HUC12s) for the state of Alaska. Variables include land uses, barriers to fish movement, landing strips/airports, mines, point-source pollutant sites, and infrastructure like pipelines, railroads, and roads. The source datasets that were compiled and attributed to HUC12s were identified as being: (1) meaningful for assessing fish habitat; (2) consistent across the entire state of Alaska in the way that they were assembled; (3) representative of conditions from 2000 to 2010; and (4) of sufficient spatial resolution that they could be used to make valid comparisons among HUC-12s. This shapefile also includes seven subindices that carry scores for each watershed that range from zero to one and represent each watershed's degree of disturbance relative to all other watersheds in the study area. Index scores in each HUC-12 were summed together to yield a cumulative disturbance score for each watershed. Please use the following citation: Esselman, P., D.M. Infante, A. Cooper, D. Wieferich, L. Wang, and W. Taylor. (April 2011) National Fish Habitat Action Plan (NFHAP) 2010 HCI Scores and Human Disturbance Data for Alaska linked to HUC12s for Alaska. National Fish Habitat Partnership Data System. http://dx.doi.org/doi:10.5066/F7KD1VWD