Rainfall induced landslides are
one of the most frequent natural hazards on slanted terrains. They usually
result in great economic losses and fatalities globally. Worldwide at least
32,322 deaths between 2004 and 2010 have been reported and in the United States
alone, landslides cause $1-2 billion in damages and more than 25 fatalities in
average each year.
Understanding, mapping, modeling
and preventing the aftermath of these devastating events represents an important
scientific and operational endeavor.The term “Landslide” describes the
downward and outward movement of slope-forming materials that include rock,
earth, and debris or a combination of these.
Although landslides are
considered to be dependent on the complex interaction of several static and
dynamic factors slope angle has great influence on the susceptibility of a
slope to sliding. Increased slope angle usually correlates to increased likelihood
of failure even if the material distribution on the slope is uniform and
isotropic.
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