This dataset represents the relative average amount of non-woody cover within 2 ha) of bottomland along the Colorado River from the Colorado state line (San Juan and Grand Counties, Utah) to the southern Canyonlands NP boundary, as of September 2010. Traditional image interpretation cues were used to develop the polygons, such as shape, size, pattern, tone, texture, color, and shadow, from high resolution, true color, aerial imagery (0.3m resolution), acquired for the project. Additional, public available aerial photos (NAIP, 2011) were used to cross-reference cover classes. As with any digital layer, this layer is a representation of what is actually occurring on the ground. Errors are inherent in any interpretation of ground qualities. Due to the "snapshot" nature of the aerial photos, this cover layer reflects conditions that existed when the imagery was collected (September, 2010). This mapping was conducted as part of the Colorado River Conservation Planning Project, a joint effort between the National Park Service, The Nature Conservancy, US Geological Survey, Bureau of Land Management, and Utah Forestry Fire and State Lands.

This is a model showing estimated habitat suitability for open land (grassland) species, or those that burrow, or prey on species that burrow. The model incorporates two factors: the relative abundance of non-woody cover types and the distance from high water.

This is a model showing estimated habitat suitability for open land (grassland) species, or those that burrow, or prey on species that burrow. The model incorporates two factors: the relative abundance of non-woody cover types and the distance from high water.

This is a model showing estimated habitat suitability for open land (grassland) species, or those that burrow, or prey on species that burrow. The model incorporates two factors: the relative abundance of non-woody cover types and the distance from high water.

Vegetation and water surface cover was mapped for the entire Colorado River bottomland within the project area (Utah/Colorado border to lower boundary of Canyonlands National Park) using high resolution photographs flown in September of 2010. Vegetation cover was mapped initially by the National Park Service and heavily edited for use in the project. Channel mapping was initially done by John Dohrenwend, with polygons heavily edited for use in the project. Cover was identified as most prominent (Dominant), next most prominent (Common), next most prominent (Present) and last most prominent (also Present). Codes for cover types and cover type descriptions are available within the dataset and metadata.

This data set shows the extent of the Colorado River Conservation Planning project bottomland area as delineated by topography and vegetation, The bottomland area is subdivided into 1 km polygons measured from the upstream project boundary.

This data set shows the extent of the Colorado River Conservation Planning project bottomland area as delineated by topography and vegetation, The bottomland area is subdivided into 1 km polygons measured from the upstream project boundary. Reach breaks were determined by large topographic shifts and/or tributary junctions by John Dohrenwend. Please see the project report for more details.

This data set shows the extent of the Colorado River Conservation Planning project bottomland area as delineated by topography and vegetation, The bottomland area is subdivided into 1 km polygons measured from the upstream project boundary.

We mapped surface water from high resolution photography taken on September 16, 2010, at a stream flow of 96.5 m3/s (3,410 ft3/s, Cisco gage). We subdivided surface water into six categories: primary channel, secondary channel, split flow channel, backwater, isolated pool, and tributary channel, similar to that of fish habitat methods used extensively in Oregon. Channel types that are not primary channel are considered ‘off-channel’.

We mapped surface water from high resolution photography taken on September 16, 2010, at a stream flow of 96.5 m3/s (3,410 ft3/s, Cisco gage). We subdivided surface water into six categories: primary channel, secondary channel, split flow channel, backwater, isolated pool, and tributary channel, similar to that of fish habitat methods used extensively in Oregon. Channel types that are not primary channel are considered ‘off-channel’.