INTRODUCTION
TYPES
OF AVALANCHE
THE
MECHANISM OF AVALANCHE RELEASE
FORECASTING
SNOW AVALANCHES
AVALANCHE
CONTROL TECHNIQUES
AVALANCHE
HAZARD RATINGS
AVALANCHE
TRAINING FOR DOGS
INFO
ON THE PAGE OWNERS
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INTRODUCTION...
-
some
basic characteristics of avalanche
Avalanches run
in the same paths year after year, that's how the danger zones are often
being well known in normal circumstances, although exceptional weather
at intervals of many years may produce different avalanches which overrun
their normal paths and may even break new ones where none existed for centuries.
Unwise timber removal in alpine terrain can also create avalanches where
none existed before. Even short slopes like the walls of a ravine can become
dangerous, as given exceptional snow conditions, snow avalanche may fall
anywhere that enough snow is deposited in the right circumstances on an
inclined surface.
Although
these right circumstances sometimes consist of abnormally large snowfalls,
but it is not neccessarily so. Avalanches find their genesis in snow cover
structural weaknesses which are often caused by internal changes. If anchored
to a solid underlayer, large overburden of snow alone may not result in
avalanches. On the other hand, if poorly bonded, even a shallow snow layer
can slide from the mountainside. Avalanches are a complex problem in mechanical
stability which can best be understood in terms of the physical processes
taking place in the changeable winter snow and the dependence of these
on temperature.
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Picture Gallery
In
this section, you will get to see pictures of avalanches happening worldwide...dated
from the 1900s...
Maps of avalanche-affected
areas
Click on the globe to see
frequently hit places...
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