Mitigation

 

Background

Formation

Types

Mitigation

Safety

Rescue

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Predicting Avalanches

Avalanches are very hard to predict. The methods currently used for prediction are weather monitoring and snow pit digging. The weather is monitored to watch for conditions such as wet, heavy snowfalls, blizzards, and high winds. Snow pits are dug to test the strength of layers within the snow pack.

Source: http://www.uaf.edu/seagrant/NewsMedia/01ASJ/images/SnowPit.jpg

Preventing Avalanches

There are many methods currently used to prevent avalanche hazards.

Controlled avalanches are intentionally triggered avalanches. They are caused by explosives or by ski cutting.

Source: http://www.nohowinc.com/avitower.jpg

Snow sheds are very strong concrete barriers that are built over highways and railroads that cross avalanche paths. The vehicles and trains are safe from avalanches under the snow sheds.

Source: http://www.usahighwayriders.com/images/News/20040619/P6250350.JPG

Source: http://www.slf.ch/schnee-lawinen/Lawinenschutz/projekte-lawinenschutz-en.html

Deflecting walls divert the direction of snow.

Source: http://www.snowman-jim.org/climbing/photos/galteur/

Barrier fences are used to slow the movement of avalanches.

Source: http://www.ac-grenoble.fr/risqmaj/realisations/74/douvaine/images/paravalanche2.jpg