Publications
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Remote sensing of rainfall for debris-flow hazard assessment
Recent advances in remote sensing of rainfall provide more detailed temporal and spatial data on rainfall distribution. Four case studies of abundant debris flows over relatively small areas triggered during intense rainstorms are examined noting the potential for using remotely sensed rainfall data for landslide hazard analysis. Three examples with rainfall estimates from National Weather Service
Authors
G. F. Wieczorek, J. A. Coe, J. W. Godt
Wildfire-related debris-flow generation through episodic progressive sediment-bulking processes, western USA
Debris-flow initiation processes on hillslopes recently burned by wildfire differ from those generally recognized on unburned, vegetated hillslopes. These differences result from fire-induced changes in the hydrologic response to rainfall events. In this study, detailed field and aerial photographic mapping, observations, and measurements of debris-flow events from three sites in the western U.S.
Authors
S.H. Cannon, J.E. Gartner, C. Parrett, M. Parise
Estimating debris-flow probability using fan stratigraphy, historic records, and drainage-basin morphology, Interstate 70 highway corridor, central Colorado, U.S.A
We have used stratigraphic and historic records of debris-flows to estimate mean recurrence intervals of past debris-flow events on 19 fans along the Interstate 70 highway corridor in the Front Range of Colorado. Estimated mean recurrence intervals were used in the Poisson probability model to estimate the probability of future debris-flow events on the fans. Mean recurrence intervals range from 7
Authors
J. A. Coe, J. W. Godt, M. Parise, A. Moscariello
Slip history and dynamic implications of the 1999 Chi-Chi, Taiwan, earthquake
[1] We investigate the rupture process of the 1999 Chi‐Chi, Taiwan, earthquake using extensive near‐source observations, including three‐component velocity waveforms at 36 strong motion stations and 119 GPS measurements. A three‐plane fault geometry derived from our previous inversion using only static data [Ji et al., 2001] is applied. The slip amplitude, rake angle, rupture initiation time, and
Authors
Ji Chen, Donald V. Helmberger, David J. Wald, Kuo-Fong Ma
Source model for the Mw 6.7, 23 October 2002, Nenana Mountain earthquake (Alaska) from InSAR
The 23 October 2002 Nenana Mountain Earthquake (Mw ∼ 6.7) occurred on the Denali Fault (Alaska), to the west of the Mw ∼ 7.9 Denali Earthquake that ruptured the same fault 11 days later. We used 6 interferograms, constructed using radar images from the Canadian Radarsat-1 and European ERS-2 satellites, to determine the coseismic surface deformation and a source model. Data were acquired on ascendi
Authors
Tim J. Wright, Z. Lu, Charles Wicks
Timing of recent accelerations of Pine Island Glacier, Antarctica
We have used Interferometric Synthetic Aperture Radar (InSAR) data and sequential Landsat imagery to identify and temporally constrain two acceleration events on Pine Island Glacier (PIG). These two events are separated by a period of at least seven years (1987 - 1994). The change in discharge between two flux gates indicates that the majority of the increase in discharge associated with the secon
Authors
I. Joughin, Eric Rignot, Christine E. Rosanova, Baerbel K. Lucchitta, J. Bohlander
Hilbert-Huang transform analysis of dynamic and earthquake motion recordings
This study examines the rationale of Hilbert-Huang transform (HHT) for analyzing dynamic and earthquake motion recordings in studies of seismology and engineering. In particular, this paper first provides the fundamentals of the HHT method, which consist of the empirical mode decomposition (EMD) and the Hilbert spectral analysis. It then uses the HHT to analyze recordings of hypothetical and real
Authors
R.R. Zhang, S. Ma, E. Şafak, S. Hartzell
Using multiple logistic regression and GIS technology to predict landslide hazard in northeast Kansas, USA
Landslides in the hilly terrain along the Kansas and Missouri rivers in northeastern Kansas have caused millions of dollars in property damage during the last decade. To address this problem, a statistical method called multiple logistic regression has been used to create a landslide-hazard map for Atchison, Kansas, and surrounding areas. Data included digitized geology, slopes, and landslides, ma
Authors
G.C. Ohlmacher, J.C. Davis
A model for spatially and temporally distributed shallow landslide initiation by rainfall infiltration
We describe a model for regional initiation of shallow landslides based on an approximate analytic solution to Richards equation combined with an infinite-slope calculation. The model applied over digital topography computes pressure heads and factors of safety as functions of depth for geographic information system (GIS) grid cells at any time during and after rainfall events. An example is prese
Authors
W. Z. Savage, J. W. Godt, R.L. Baum
Enlisting the support of land-use planners to reduce debris-flow hazards in the United States
Land-use planners have an important role in reducing losses from debris-flow hazards. For that reason, the U.S. Geological Survey (USGS) and the American Planning Association (APA) have developed a strategy to make information about landslide and debris-flow hazards available to local planners so that they can incorporate this information into the planning process. A guidebook for planners and act
Authors
P. L. Gori, S.P. Jeer, L.M. Highland
Responses of infaunal populations to benthoscape structure and the potential importance of transition zones
Relationships between population abundance and seafloor landscape, or benthoscape, structure were examined for 16 infaunal taxa in eastern Long Island Sound. Based on analyses of a side-scan sonar mosaic, the 19.4-km2 study area was comprised of six distinct large-scale (> km2) benthoscape elements, with varying levels of mesoscale (km2-m2) and small-scale (< m2) physical and biological habitat he
Authors
R.N. Zajac, R. S. Lewis, L. J. Poppe, D. C. Twichell, J. Vozarik, M. L. DiGiacomo-Cohen
Volcano seismology
A fundamental goal of volcano seismology is to understand active magmatic systems, to characterize the configuration of such systems, and to determine the extent and evolution of source regions of magmatic energy. Such understanding is critical to our assessment of eruptive behavior and its hazardous impacts. With the emergence of portable broadband seismic instrumentation, availability of digital
Authors
B. Chouet