Mapping time-dependent changes in soil-slip-debris-flow probability

Campbell, Russell H.; Bernknopf, Richard; Soller, David R.

doi:10.3133/i2586

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…A subset of these failures mobilize as debris flows, mixtures of soil, water, rock, and vegetation that flow down steepland valleys (e.g., Iverson 1997;Stock and Dietrich 2003). Historic shallow failures occur during or shortly after storms that contain hourly rainfall rates >5-10 mm h -1 (Campbell 1975;Wieczorek 1987;Campbell et al 1998). In the California Coast Ranges, and perhaps elsewhere, even intense storms do not seem to trigger failures unless the soils are already moist from early season rain.…”

Section: Background On Landslidesmentioning

confidence: 99%

“…In the California Coast Ranges, and perhaps elsewhere, even intense storms do not seem to trigger failures unless the soils are already moist from early season rain. Historic events indicate that seasonal antecedent rainfalls (i.e., rainfall totaled from 1 October onward) must exceed 250 mm (Nilsen and Turner 1975;Campbell 1975;Nilsen et al 1976;Cannon and Ellen 1985;Wieczorek 1987;Wilson and Jayko 1997) before steepland soils are susceptible to shallow landsliding. Threshold rainfall rates and accumulations may be greatly lowered for locations influenced by wildfire activity and changes in soil and vegetative characteristics (Florsheim et al 1991;Turner 1996;Cannon and Gartner 2005).…”

Section: Background On Landslidesmentioning

confidence: 99%

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A 142-Year Climatology of Northern California Landslides and Atmospheric Rivers

Cordeira

Stock

Dettinger

et al. 2019

Bulletin of the American Meteorological Society

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We compare a novel dataset of San Francisco Bay Area landslides from 1871 to 2012 to corresponding atmospheric conditions commonly associated with Pacific winter storms and landfalling atmospheric rivers (ARs). Landslides in the San Francisco Bay Area occur primarily during winter months, coinciding with enhanced integrated water vapor transport (IVT) magnitudes ≥250 kg m–1 s–1 at the coast 76% of the time and with landfalling ARs over the near-offshore northeast Pacific 82% of the time. Results illustrate that days, or the first in a series of days, with a landslide (i.e., landslide onset days) typically occur in association with NOAA Twentieth Century Reanalysis–derived IVT magnitudes ≥250 kg m–1 s–1 that persist for ∼20 h and temporal maxima in precipitation rates. Composite analyses of sea level pressure, integrated water vapor, and IVT during 3-month periods during September–May on landslide onset days further illustrate that these events coincide with regions of low pressure to the northwest of California and high pressure to the south, synoptic-scale flow conditions associated with strong onshore flow, and water vapor transports in the form of landfalling ARs.

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Section: Background On Landslidesmentioning

confidence: 99%

Section: Background On Landslidesmentioning

confidence: 99%

A 142-Year Climatology of Northern California Landslides and Atmospheric Rivers

Cordeira

Stock

Dettinger

et al. 2019

Bulletin of the American Meteorological Society

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Landslide Hazard Mitigation in North America

Wieczorek

Leahy

2008

Environmental and Engineering Geoscience

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Map and map database of susceptibility to slope failure by sliding and earthflow in the Oakland area, California

Pike¹,

Graymer²,

Roberts³

et al. 2001

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Introduction Acknowledgments Oakland's landslide hazard Prior mapping of susceptibility Scope, assumptions, method Input to the susceptibility model Geology Old landslide deposits Recent landslides Topography and slope A model of landslide susceptibility Spatial frequency of prior failure Susceptibility between old landslide deposits Susceptibility within old landslide deposits Tests of the susceptibility model The susceptibility map Applications and limitations Future research References cited Appendix-the digital map database Introduction Spatial resolution Overview of the digital database Database contents Revisions Obtaining the database files Opening the database files Importing the ARC export files

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Mapping time-dependent changes in soil-slip-debris-flow probability

Cited by 3 publications

References 7 publications

A 142-Year Climatology of Northern California Landslides and Atmospheric Rivers

A 142-Year Climatology of Northern California Landslides and Atmospheric Rivers

Landslide Hazard Mitigation in North America

Map and map database of susceptibility to slope failure by sliding and earthflow in the Oakland area, California

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