Conference Papers
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The USGS provides unbiased, objective, and impartial scientific information upon which our audiences, including resource managers, planners, and other entities, rely.
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Satellite observations of surface deformation at the Coso Geothermal Field, California Satellite observations of surface deformation at the Coso Geothermal Field, California
Surface deformation time series and rates are identified at the Coso Geothermal Field (CGF) and surrounding areas by applying interferometric synthetic aperture radar (InSAR) to satellite scenes from Envisat (June 2004 ̶ October 2010) and Sentinel (November 2014 – April 2018). The measurements are done in the line of sight (LOS) to each satellite, within an area of size ~450 km2, at the
Authors
Mariana Eneva, Andrew Barbour, David Adams, Vicky Hsiao, Kelly Blake, Giacomo Falorni, Roberto Locatelli
iCoast – Did the Coast Change?: Storm-impact model verification using citizen scientists iCoast – Did the Coast Change?: Storm-impact model verification using citizen scientists
The USGS provides model predictions of severe storm impacts prior to landfall based on pre-storm morphology and predicted total water levels, including waves and surge. Presented in near real time on the USGS Coastal Change Hazard Portal, they provide coastal residents, scientists, and emergency managers valuable coastal response information. iCoast – Did the Coast Change?, an online...
Authors
Karen L. M. Morgan, Nathaniel G. Plant, Hilary F. Stockdon, Richard J. Snell
A 4000-year history of debris flows in north-central Washington State, U.S.A.: Preliminary results from trenching and surficial geologic mapping at the Pope Creek fan A 4000-year history of debris flows in north-central Washington State, U.S.A.: Preliminary results from trenching and surficial geologic mapping at the Pope Creek fan
Long-term records of the magnitude and frequency of debris flows on fans are rare, but such records provide critical information needed for debris-flow hazard and risk assessments. This study explores the history of debris flows on a fan with seasonally inhabited cabins at Pope Creek along the Entiat River about 48 km upstream from the town of Entiat, Washington. Motivation for this...
Authors
Jeffrey A. Coe, Erin Bessette-Kirton, Stephen Slaughter, Francis K. Rengers, Trevor A. Contreras, Katherin A Michelson, Emily M. Taylor, Jason W. Kean, Kara Jacobacci, Molly A Hanson
Exploring controls on debris-flow surge velocity and peak discharge at Chalk Cliffs, Colorado, USA Exploring controls on debris-flow surge velocity and peak discharge at Chalk Cliffs, Colorado, USA
We present a series of debris-flow events and use combined sensor and video data to explore how sediment concentration and triggering rainfall intensity affect the velocity and discharge of debris-flow surges generated by surface-water runoff. We analyze an initial data set of 49 surges from four debris-flow events recorded by a monitoring system at Chalk Cliffs, Colorado and compare...
Authors
Joel B. Smith, Jason W. Kean, Jeffrey A. Coe
An evaluation of debris-flow runout model accuracy and complexity in Montecito, CA: Towards a framework for regional inundation-hazard forecasting An evaluation of debris-flow runout model accuracy and complexity in Montecito, CA: Towards a framework for regional inundation-hazard forecasting
Numerous debris-flow inundation models have been applied retroactively to noteworthy events around the world. While such studies can be useful in identifying controlling factors, calibrating model parameters, and assessing future hazards in specific study areas, model parameters tailored to individual events can be difficult to apply regionally. The advancement of debris-flow modeling...
Authors
Erin Bessette-Kirton, Jason W. Kean, Jeffrey A. Coe, Francis K. Rengers, Dennis M. Staley
Real-time monitoring of debris-flow velocity and mass deformation from field experiments with high sample rate lidar and video Real-time monitoring of debris-flow velocity and mass deformation from field experiments with high sample rate lidar and video
Debris flows evolve in both time and space in complex ways, commonly starting as coherent failures but then quickly developing structures such as roll waves and surges. This process is readily observed, but difficult to study or quantify because of the speed at which it occurs. Many methods for studying debris flows consist of point measurements (e.g., of flow height or basal stresses)...
Authors
Francis K. Rengers, Thomas Rapstine, Kate E. Allstadt, Michael Olsen, Michael Bunn, Richard M. Iverson, Jason W. Kean, Ben Leshchinsky, Matthew Logan, Mahyar Sharifi-Mood, Maciej Obryk, Joel B. Smith