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Seismically induced rock slope failures resulting from topographic amplification of strong ground motions: The case of Pacoima Canyon, California [PDF]

Engineering Geology, 2005
The 1994 Northridge earthquake (M-w = 6.7) triggered extensive rock slope failures in Pacoima Canyon, immediately north of Los Angeles, California. Pacoima Canyon is a narrow and steep canyon incised in gneissic and granitic rocks.
Sérgio A Sepulveda, W Murphy, Randall W Jibson   +2 more
exaly   +2 more sources

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Topographic Ocean Gyres: A Western Boundary Slope

Journal of Physical Oceanography, 1996
Abstract The appropriate lateral boundary condition for an oceanic general circulation model is not yet well determined. A large-scale current is inhibited from ascending the continental slope because of the restriction of the potential vorticity conservation.
Atsushi Kubokawa, James C. McWilliams
openaire   +1 more source

Effects of Topographic Slopes on Hydrological Proecsses and Climate

Advances in Atmospheric Sciences, 2001
Based on previous research results on river re-distribution models, a modification on the effects of topographic slopes for a runoff parameterization was proposed and implemented to the NCAR’s land surface model (LSM). This modification has two aspects: firstly, the topographic slopes cause outflows from higher topography and inflows into the lower ...
Jinliang Liu, Han-Ru Cho
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Influence of ground anchors on topographic amplification at slope crests

, 2010
One feature of earthquake loading in regions containing sloping ground is a marked increase in accelerations at the crests of slopes. Many field cases exist where such increased accelerations were measured.
Thusyanthan, NI, Madabhushi, SPG, ,, Brennan, AJ   +3 more
core   +3 more sources

Topographic effects on the seismic response of steep slopes

Bulletin of the Seismological Society of America, 1997
AbstractA frequency-domain parametric study using generalized consistent transmitting boundaries has been performed to evaluate the significance of topographic effects on the seismic response of steep slopes. The results show that the peak amplification of motion at the crest of a slope occurs at a normalized frequency H/λ = 0.2, where H is the slope ...
Scott A. Ashford, Nicholas Sitar, John Lysmer, Nan Deng   +3 more
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SCALES FOR DETERMINING SLOPE FROM TOPOGRAPHIC MAPS

The Professional Geographer, 1968
(1968). SCALES FOR DETERMINING SLOPE FROM TOPOGRAPHIC MAPS. The Professional Geographer: Vol. 20, No. 3, pp. 181-186.
Norman J. W. Thrower, Ronald U. Cooke
openaire   +1 more source

Site Condition Mapping using Topographic Slopes

Proceedings, 2013
We investigate the possibility of adaptation a new method for large scale assessment of seismic site conditions and amplification, by using maps derived from topographic data, making the technique quick and cost effective. The maps uses topography slopes as a proxy for site conditions, based on its close connection to the results of shear wave velocity
P. Tildy, Z. Prónay, G. Taller
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Using topographic slope distributions to infer seafloor patterns

IEEE Journal of Oceanic Engineering, 1989
The authors present a method for obtaining parameters for Sea Beam swath bathymetry which describe the characteristics of abyssal-hill topography. The basic quantity used in the analysis is the distribution of topographic slopes in a region. A convenient means for parameterizing these slopes is through unit vectors that are normal to small patches of ...
D.K. Smith, P.R. Shaw
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Topographic Slope as a Proxy for Seismic Site Conditions and Amplification

Bulletin of the Seismological Society of America, 2007
We describe a technique to derive first-order site condition maps directly from topographic data. For calibration, we use global 30 arc sec topographic data and V S 30 measurements (here V S 30 , refers to the average shear-velocity down to 30 m) aggregated from several studies in the U.S., as well as in Taiwan, Italy, and Australia.
D. J. Wald, T. I. Allen
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Do Martian slopes with Recurring Slope Lineae (RSL) have a distinct topographic signature?

2021
<p>Recurring Slope Lineae (RSL) are dynamic, low-albedo, slope-parallel surface features on Mars that occur mainly on steep (>25°) slopes. RSL typically display seasonal dynamics as they appear during late Martian spring, progressively grow during summer, and subsequently fade as summer ends.
Aharon Adam, Itai Haviv, Dan G. Blumberg, Shimrit Maman, Amit Mushkin   +4 more
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