Publications
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Relations Between Rainfall and Postfire Debris-Flow and Flood Magnitudes for Emergency-Response Planning, San Gabriel Mountains, Southern California
Following wildfires, emergency-response and public-safety agencies are faced often with making evacuation decisions and deploying resources both well in advance of each coming winter storm and during storms themselves. Information critical to this process is provided for recently burned areas in the San Gabriel Mountains of southern California. The National Weather Service (NWS) issues Quantitativ
Authors
Susan H. Cannon, Eric M. Boldt, Jason W. Kean, Jayme Laber, Dennis M. Staley
Early warning of rainfall-induced shallow landslides and debris flows in the USA
The state of knowledge and resources available to issue alerts of precipitation-induced landslides vary across the USA. Federal and state agencies currently issue warnings of the potential for shallow, rapidly moving landslides and debris flows in a few areas along the Pacific coast and for areas affected by Atlantic hurricanes. However, these agencies generally lack resources needed to provide co
Authors
Rex L. Baum, Jonathan W. Godt
Observations of drainage network change in a recently burned watershed using terrestrial laser scanning
Wildfire enhances the geomorphic response of a watershed to precipitation events, effectively altering the form of the hillslope and channel drainage network. Typically, drainage networks expand following rainfall on a recently burned watershed. Expansion of drainage networks following wildfire increases in erosion and sediment transport rates, and the probability of flash-flooding and debris-flow
Authors
Dennis Staley, Thad Wasklewicz, Jason Kean
Shear-rate-dependent strength control on the dynamics of rainfall-triggered landslides, Tokushima Prefecture, Japan
A typhoon (Typhoon No. 10) attacked Shikoku Island and the Tyugoku area of Japan in 2004. This typhoon produced a new daily precipitation record of 1317 mm on Shikoku Island and triggered hundreds of landslides in Tokushima Prefecture. One catastrophic landslide was triggered in the Shiraishi area of Kisawa village, and destroyed more than 10 houses while also leaving an unstable block high on the
Authors
G. Wang, A. Suemine, W.H. Schulz
Predicting the probability and volume of postwildfire debris flows in the intermountain western United States
Empirical models to estimate the probability of occurrence and volume of postwildfire debris flows can be quickly implemented in a geographic information system (GIS) to generate debris-flow hazard maps either before or immediately following wildfires. Models that can be used to calculate the probability of debris-flow production from individual drainage basins in response to a given storm were de
Authors
S.H. Cannon, J.E. Gartner, M.G. Rupert, J. A. Michael, A. H. Rea, C. Parrett
Analysis of elevation changes detected from multi-temporal LiDAR surveys in forested landslide terrain in western Oregon
We examined elevation changes detected from two successive sets of Light Detection and Ranging (LiDAR) data in the northern Coast Range of Oregon. The first set of LiDAR data was acquired during leafon conditions and the second set during leaf-off conditions. We were able to successfully identify and map active landslides using a differential digital elevation model (DEM) created from the two LiDA
Authors
W.J. Burns, J. A. Coe, B.S. Kaya, Liwang Ma
High tsunami frequency as a result of combined strike-slip faulting and coastal landslides
Earthquakes on strike-slip faults can produce devastating natural hazards. However, because they consist predominantly of lateral motion, these faults are rarely associated with significant uplift or tsunami generation. And although submarine slides can generate tsunami, only a few per cent of all tsunami are believed to be triggered in this way. The 12 January Mw 7.0 Haiti earthquake exhibited pr
Authors
M.J. Hornbach, N. Braudy, R.W. Briggs, M.-H. Cormier, M.B. Davis, J.B. Diebold, N. Dieudonne, R. Douilly, C. Frohlich, S.P.S. Gulick, H. E. Johnson, P. Mann, C. McHugh, K. Ryan-Mishkin, C. S. Prentice, L. Seeber, C.C. Sorlien, M.S. Steckler, S.J. Symithe, F. W. Taylor, J. Templeton
Distribution and tsunamigenic potential of submarine landslides in the Gulf of Mexico
The Gulf of Mexico (GOM) is a geologically diverse ocean basin that includes three distinct geologic provinces: a carbonate province, a salt province, and canyon to deep-sea fan province, all of which contain evidence of submarine mass movements. The threat of submarine landslides in the GOM as a generator of near-field damaging tsunamis has not been widely addressed. Submarine landslides in the G
Authors
Jason D. Chaytor, David C. Twichell, Patrick Lynett, Eric L. Geist
Estimating the timing and location of shallow rainfall-induced landslides using a model for transient, unsaturated infiltration
Shallow rainfall-induced landslides commonly occur under conditions of transient infiltration into initially unsaturated soils. In an effort to predict the timing and location of such landslides, we developed a model of the infiltration process using a two-layer system that consists of an unsaturated zone above a saturated zone and implemented this model in a geographic information system (GIS) fr
Authors
Rex L. Baum, Jonathan W. Godt, William Z. Savage
Geologic characteristics and movement of the Meadow Creek landslide, part of the Coal Hill landslide complex, western Kane County, Utah
The Meadow Creek landslide, part of the Coal Hill landslide complex in western Kane County, Utah, is about 1.7 miles (2.7 km) wide and 1.3 miles (2.1 km) long and contains six smaller historical slides. The upper part of the Meadow Creek landslide is gently sloping and consists of displaced and back-rotated blocks of Cretaceous Dakota and Cedar Mountain Formations that form northeast- to locally
Authors
Francis X. Ashland, Greg N. McDonald
Effects of soil aggregates on debris-flow mobilization: Results from ring-shear experiments
Rates and styles of landslide motion are sensitive to pore-water pressure changes caused by changes in soil porosity accompanying shear deformation. Soil may either contract or dilate upon shearing, depending upon whether its initial porosity is greater or less, respectively, than a critical-state porosity attained after sufficiently high strain. We observed complications in this behavior, however
Authors
Neal R. Iverson, Janet E. Mann, Richard M. Iverson
Evolution of earthquake-triggered landslides in the Kashmir Himalaya, northern Pakistan
The influence of the 08 October 2005 Kashmir earthquake and subsequent snow melt and monsoon rainfall on slope stability was evaluated using repeat photography in the Kashmir Himalaya of northern Pakistan. Sixty-eight landslide-affected locations were selected and photographed in November 2005, May/June 2006, June 2007, and August 2007 to evaluate all potential geomorphic changes. Eighty percent o
Authors
G.A. Khattak, L.A. Owen, U. Kamp, E. L. Harp