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snippet:
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Debris flows are an important sediment transport process in 740 tributaries of the Colorado River in Grand Canyon, Arizona (Webb et al., 2000). The large boulders deposited in the river by debris flows form the core of rapids that modify the longitudinal profile and locally control the geomorphic framework of the present-day Colorado River in Grand Canyon (Webb, 1996). Debris flows are a potential hazard to the white water recreational community, both by affecting navigation of the river and endangering people in narrow canyons or camped at the river. Debris flow probabilities may have changed since this data was published in 2004. |
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summary:
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Debris flows are an important sediment transport process in 740 tributaries of the Colorado River in Grand Canyon, Arizona (Webb et al., 2000). The large boulders deposited in the river by debris flows form the core of rapids that modify the longitudinal profile and locally control the geomorphic framework of the present-day Colorado River in Grand Canyon (Webb, 1996). Debris flows are a potential hazard to the white water recreational community, both by affecting navigation of the river and endangering people in narrow canyons or camped at the river. Debris flow probabilities may have changed since this data was published in 2004. |
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accessInformation:
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Byerley, E.B and Gushue, T.M., We revived this 20 year old dataset by joining Griffiths and others (2004) debris flow probability table with a feature class representing watershed boundaries of ungaged tributaries to the Colorado River in Grand Canyon. |
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description:
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This dataset represents 740 tributary watersheds to the Colorado River in Grand Canyon with associated debris flow probabilities from 2004. It also includes tributary 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 a 100 year record of debris flows from 147 tributaries. Owing to the limitations of the initial datasets and the focus on geomorphic change in the river corridor, debris flow probabilities pertain only to debris flows that reach the Colorado River. |
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licenseInfo:
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Users are advised to read the dataset's metadata thoroughly to understand appropriate use and data limitations. The debris flow probabilities included in these data were developed as part of a research project focused on historical trends and should not be inferred or used to predict future patterns or levels of anticipated debris flows and flash flood activity. These data are intended to improve debris flow and flash flood awareness and preparedness; however, they do not guarantee the safety of an individual or structure. The contributors and sponsors of this product do not assume liability for any injury, death, property damage, or other effects of debris flows or flash floods. |
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catalogPath:
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title:
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Debris Flow Probabilities of Ungaged Tributaries to the Colorado River in Grand Canyon, AZ |
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type:
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url:
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tags:
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["biota","debris flow","watershed","tributary","slope failure","slope failure","geomorphology","debris fan","rapid","Grand Canyon","Colorado River","Arizona"] |
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culture:
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en-US |
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guid:
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minScale:
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24000 |
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