A. Pervasive disturbances: The most common disturbances based on total stream length in a given region. Top five overall most pervasive disturbances to all stream reaches, regardless of stream size and across all spatial scales (ranked highest first): Crop land use Low intensity urban land use Impervious surface cover Road crossing density Agricultural water withdrawal Top five most pervasive disturbances to , specific to spatial scale: Crop land use in network catchments Crop land use in network buffers Low intensity urban land use in network catchments Crop land use in local buffers Impervious surface cover in network catchments In the Northern Plains state group, 36.6% of streams are classified as low or very low risk [...]
