Statistics – Computation
Scientific paper
Apr 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3407301g&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 7, CiteID L07301
Statistics
Computation
3
Computational Geophysics: Modeling (4255), Structural Geology: Mechanics, Theory, And Modeling, Structural Geology: Role Of Fluids
Scientific paper
Natural landslides often exhibit surprisingly large travel distances, and an unexplained decrease in apparent friction coefficient H/L (where H is the drop height and L the travel distance) with increasing slide volume, V. This manuscript investigates a thermo-poro-elastic mechanism operating at the base of landslides that may explain this curious behavior. Simulation results indicate that frictional heating at the shear zone at the base of a landslide, elevates pore fluid pressure and reduces friction, resulting in large sliding velocities and distances. Depth-dependent permeability controls pore pressure diffusion rates from the shear zone, allowing larger slides to maintain high pore pressure for longer times, thus resulting in lower H/L. The numerically obtained relation between V and H/L, agrees with field data of subaerial landslides.
Aharonov Einat
Goren Lilach
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