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Hydrologist uses a theodolite to survey channel morphology along the Drift River which drains Redoubt Volcano. This information is used to calculate water flow and to track the changing geometry of channels which can affect downstream hazards. Volcanic activity in Alaska where many volcanoes are covered with snow and ice year-round poses an especially great hydrologic risk along radiating drainages due to the melting by hot volcanic debris.

Hydrologist uses a theodolite to survey channel morphology along the Drift River which drains Redoubt Volcano. This information is used to calculate water flow and to track the changing geometry of channels which can affect downstream hazards. Volcanic activity in Alaska where many volcanoes are covered with snow and ice year-round poses an especially great hydrologic risk along radiating drainages due to the melting by hot volcanic debris.

Date: October 1990
Volcano(es): Redoubt
Photographer: Neal, C. A.
URL: avo.alaska.edu/image/view/600
Image courtesy of AVO / U.S. Geological Survey.
Please cite the photographer and the Alaska Volcano Observatory/U.S. Geological Survey when using this image.
Full Resolution.