Publications
Filter Total Items: 897
Temperature, snowmelt, and the onset of spring season landslides in the central Rocky Mountains Temperature, snowmelt, and the onset of spring season landslides in the central Rocky Mountains
Snow meltwater (snowmelt) that seeps into the subsurface is a major factor contributing to the development of landslides during the spring in mountainous areas of the Rocky Mountain region. An examination of historical temperature data in relation to spring season landslide occurrences reveals an association between the landslide events and intervals of rising temperatures that...
Authors
Alan F. Chleborad
Index to detailed maps of landslides in the San Francisco Bay region, California Index to detailed maps of landslides in the San Francisco Bay region, California
No abstract available.
Authors
Richard J. Pike
Hydraulic modeling of unsteady debris-flow surges with solid-fluid interactions Hydraulic modeling of unsteady debris-flow surges with solid-fluid interactions
Interactions of solid and fluid constituents produce the unique style of motion that typifies debris flows. To simulate this motion, a new hydraulic model represents debris flows as deforming masses of granular solids variably liquefied by viscous pore fluid. The momentum equation of the model describes how internal and boundary forces change as coarse-grained surge heads dominated by...
Authors
Richard M. Iverson
Normalizing rainfall/debris-flow thresholds along the U.S. Pacific coast for long-term variations in precipitation climate Normalizing rainfall/debris-flow thresholds along the U.S. Pacific coast for long-term variations in precipitation climate
Broad-scale variations in long-term precipitation climate may influence rainfall/debris-flow threshold values along the U.S. Pacific coast, where both the mean annual precipitation (MAP) and the number of rainfall days (#RDs) are controlled by topography, distance from the coastline, and geographic latitude. Previous authors have proposed that rainfall thresholds are directly...
Authors
Raymond C. Wilson
Geotechnical properties of debris-flow sediments and slurries Geotechnical properties of debris-flow sediments and slurries
Measurements of geotechnical properties of various poorly sorted debris-flow sediments and slurries (??? 32 mm diameter) emphasize their granular nature, and reveal that properties of slurries can differ significantly from those of compacted sediments. Measurements show that: (1) cohesion probably offers little resistance to shear in most debris flows under low confining stresses...
Authors
J. J. Major, R.M. Iverson, D.F. McTigue, S. Macias, B.K. Fiedorowicz
Debris-flow hazards in areas affected by the June 27, 1995, storm in Madison County, Virginia Debris-flow hazards in areas affected by the June 27, 1995, storm in Madison County, Virginia
A severe storm on June 27, 1995 triggered hundreds of rock, debris and soil slides from the steep hillsides of Madison County, Virginia. Most of these transformed into debris flows that inundated areas downslope causing damage to structures, roads, utilities, livestock and crops. This report contains an analysis of areas susceptible to debris flows including an examination of source...
Authors
B. A. Morgan, G. F. Wieczorek, R. H. Campbell, P. L. Gori
Map showing principal debris-flow source areas in the San Francisco Bay region, California Map showing principal debris-flow source areas in the San Francisco Bay region, California
No abstract available.
Authors
Stephen D. Ellen, Robert K. Mark, Gerald F. Wieczorek, Carl M. Wentworth, David W. Ramsey, Thomas E. May
By
Geology, Energy, and Minerals Mission Area, Natural Hazards Mission Area, Energy Resources Program, Landslide Hazards Program, Mineral Resources Program, National Laboratories Program, Science and Decisions Center, Geologic Hazards Science Center, Geology, Minerals, Energy, and Geophysics Science Center
Geologic hazards and relative slope stability of the inactive part of the Slumgullion Landslide, southwestern Colorado Geologic hazards and relative slope stability of the inactive part of the Slumgullion Landslide, southwestern Colorado
No abstract available.
Authors
Mario Parise, Andrea Moscariello
Debris-flow hazard map units from gridded probabilities Debris-flow hazard map units from gridded probabilities
The common statistical practice of dividing a range of probabilities into equal probability intervals may not result in useful landslide-hazard map units for areas populated by equal-area cells, each of which has a unique probability. Most hazard map areas contain very large numbers of cells having low probability of failure, and as probability increases, the number of cells decreases in...
Authors
Russell H. Campbell, Richard L. Bernknopf
Predicting landslide vegetation in patches on landscape gradients in Puerto Rico Predicting landslide vegetation in patches on landscape gradients in Puerto Rico
We explored the predictive value of common landscape characteristics for landslide vegetative stages in the Luquillo Experimental Forest of Puerto Rico using four different analyses. Maximum likelihood logistic regression showed that aspect, age, and substrate type could be used to predict vegetative structural stage. In addition it showed that the structural complexity of the vegetation...
Authors
R.W. Myster, J.R. Thomlinson, M. C. Larsen
Evidence from flank ridges for long-term diminishing movements of the Slumgullion landslide, Hinsdale County, Colorado Evidence from flank ridges for long-term diminishing movements of the Slumgullion landslide, Hinsdale County, Colorado
No abstract available.
Authors
Mario Parise, Andrea Moscariello, Robert W. Fleming
El Nino and the National Landslide Hazard Outlook for 1997-1998 El Nino and the National Landslide Hazard Outlook for 1997-1998
No abstract available.
Authors
Jonathan W. Godt, Lynn M. Highland, William Z. Savage