Nancy Calhoun
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View article: The influence of wildfire on debris flows in a landscape of persistent disequilibrium: Columbia River Gorge, OR, USA
The influence of wildfire on debris flows in a landscape of persistent disequilibrium: Columbia River Gorge, OR, USA Open
Extensive debris flow fans emanate from steep catchments in the Columbia River Gorge (CRG), Oregon, a landscape dramatically reshaped by Late Pleistocene megafloods. In 2017, the Eagle Creek Fire burned 200 km 2 of the CRG, prompting conce…
View article: Assessment of western Oregon debris‐flow hazards in burned and unburned environments
Assessment of western Oregon debris‐flow hazards in burned and unburned environments Open
In the steep and mountainous environment of western Oregon, debris flows pose a considerable threat to property, infrastructure and life. Wildfire is commonly known to increase the susceptibility of steep slopes to debris flows, but the ex…
View article: The Preservation of Climate‐Driven Landslide Dams in Western Oregon
The Preservation of Climate‐Driven Landslide Dams in Western Oregon Open
Bedrock landsliding, including the formation of landslide dams, is a predominant geomorphic process in steep landscapes. Clarifying the importance of hydrologic and seismic mechanisms for triggering deep‐seated landslides remains an ongoin…
View article: Post-fire rockfall and debris-flow hazard zonation in the Eagle Creek fire burn area, Columbia River Gorge, Oregon: a tool for emergency managers and first responders
Post-fire rockfall and debris-flow hazard zonation in the Eagle Creek fire burn area, Columbia River Gorge, Oregon: a tool for emergency managers and first responders Open
The Eagle Creek Fire burned 48,832 acres (196 km2) of steep, heavily forested terrain along the Columbia River Gorge, Oregon, from September 2nd to November 30th, 2017. The Columbia River Gorge is a critical lifeline for Oregon and Washing…
View article: Hunting for Landslides from Cascadia’s Great Earthquakes
Hunting for Landslides from Cascadia’s Great Earthquakes Open
Researchers examine the rings of drowned trees in landslide-dammed lakes for clues to today’s earthquake hazards in the Pacific Northwest.
View article: Distinguishing between debris flows and hyperconcentrated flows: an example from the eastern Swiss Alps
Distinguishing between debris flows and hyperconcentrated flows: an example from the eastern Swiss Alps Open
Much research has been done on water‐rich mass flows, but the distinction between hyperconcentrated flows and debris flows, and whether the two are indeed different processes, continue to be debated. Here, we contribute to the ongoing disc…