This maps shows distances away from the channel boundary of the Colorado River mainstem. The channel boundary was mapped from public available NAIP imagery flown on June 28, 2011, when the river flow was 886 m3/s at the Cisco gage. The channel is subdivided into channel types: main channel, secondary channel, backwater, isolated pool and tributary channel. Closer to the channel often non-preferred habitat for burrowing; 50-100 m is moderately non-preferred; >100 m preferred.

This a channel boundary of the Colorado River mainstem between the Utah Colorado border and the upper pool of Lake Powell, Utah (146 miles). The channel boundary was mapped from public available NAIP imagery flown on June 28, 2011, when the river flow was 886 m3/s at the Cisco gage. The channel is subdivided into channel types: main channel, secondary channel, backwater, isolated pool and tributary channel.

This a channel boundary of the Colorado River mainstem between the Utah Colorado border and the upper pool of Lake Powell, Utah (146 miles). The channel boundary was mapped from public available NAIP imagery flown on June 28, 2011, when the river flow was 886 m3/s at the Cisco gage. The channel is subdivided into channel types: main channel, secondary channel, backwater, isolated pool and tributary channel.

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 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.

Distance to 2010 channel boundary, as mapped from 2010 dataset.

Distance to 2010 channel boundary, as mapped from 2010 dataset.

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’.

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.