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This dataset represents 505 campsites along the Colorado River in Grand Canyon with associated debris flow probabilities calculated for approximately a 100-year period (Griffiths and others, 2004) and geomorphic attributes mapped by the U.S. Geological Survey, Grand Canyon Monitoring and Research Center (USGS-GCMRC) (Hadley and others, 2018). The campsite polygons were developed as part of a master campsite database that was a collaborative effort to maintain between the National Park Service in Grand Canyon National Park and the USGS-GCMRC. Debris flow probabilities have been added as an attribute from ungauged tributary watersheds published in 2004 (Griffiths and others, 2004). Area and percentages of campsites...
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This dataset represents 740 tributary canyons and/or watersheds adjacent to the Colorado River in Grand Canyon with associated debris flow probabilities from 2004. Also, these data include tributarys canyon and/or watersheds to Glen Canyon and several smaller watersheds in Grand Canyon where debris flow data is currently unavailable. Historic probabilities of debris flow occurrence were estimated by modeling the known frequency distribution with drainage basin parameters observed to control the process by which debris flows initiate and travel to the river. Observations from 1984 through 2003 provide a 20-year record of all debris flows that reached the Colorado River in Grand Canyon, and repeat photography provides...
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These spatial data represent alluvial deposits of the Colorado River and tributary deposits adjacent to the Colorado River in Grand Canyon National Park. The map covers the river corridor from Lees Ferry, Arizona to the confluence with Diamond Creek 225 miles (362 km) downstream. The alluvial deposits of the Colorado River are mapped as either sand or gravel based on surface composition and the sand deposits are further subdivided based on sandbar type (Schmidt, 1990; Mueller and others, 2018). The alluvial deposits are also subdivided based on whether they are bare sediment or covered by dense riparian vegetation. The tributary deposits consist primarily of tributary debris fans, which are coarse-grained material...
    map background search result map search result map Geomorphic basemap for the Colorado River in Grand Canyon, Arizona - May 2009 Geomorphic attributes of campsites adjacent to the Colorado River in Grand Canyon, AZ (Provisional Release) Debris flow probabilities of ungaged tributaries to the Colorado River in Grand Canyon, AZ (Provisional Release) Geomorphic basemap for the Colorado River in Grand Canyon, Arizona - May 2009 Geomorphic attributes of campsites adjacent to the Colorado River in Grand Canyon, AZ (Provisional Release) Debris flow probabilities of ungaged tributaries to the Colorado River in Grand Canyon, AZ (Provisional Release)