Avalanche

Содержание

1. Avalanche
2. An avalanche is a rapid flow of
3. Reasons of avalanches Disastrous avalanches occur when massive
4. Storminess, temperature, wind, slope steepness and orientation
5. Once the avalanche stops, it settles like
6. Notable avalanches During World War I, an estimated
7. Thank`s for your attention!Heronymivka school11 formMoroz Bogdan
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An avalanche is a rapid flow of snow down a sloping surface. While avalanches are sudden, the warning signs are almost always numerous before they let loose. Yet in 90 percent

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Слайд 1

Слайд 2 An avalanche is a rapid flow of snow down a

sloping surface. While avalanches are sudden, the warning signs are

almost always numerous before they let loose. Yet in 90 percent of avalanche incidents, the snow slides are triggered by the victim or someone in the victim's party. Avalanches kill more than 150 people worldwide each year. Most are snowmobilers, skiers, and snowboarders.

Avalanche

Слайд 3Reasons of avalanches
Disastrous avalanches occur when massive slabs of snow

break loose from a mountainside and shatter like broken glass

as they race downhill. These moving masses can reach speeds of 80 miles (130 kilometers) per hour within about five seconds. Victims caught in these events seldom escape.

Reasons of avalanches Disastrous avalanches occur when massive slabs of snow break loose from a mountainside and shatter

Слайд 4 Storminess, temperature, wind, slope steepness and orientation (the direction it

faces), terrain, vegetation, and general snowpack conditions are all factors

that influence whether and how a slope avalanches. Different combinations of these factors create low, moderate, considerable, and high avalanche hazards.

Storminess, temperature, wind, slope steepness and orientation (the direction it faces), terrain, vegetation, and general snowpack conditions

Слайд 5 Once the avalanche stops, it settles like concrete. Bodily movement

is nearly impossible. If caught in an avalanche wait—and hope—for

a rescue. After two hours, very few people survive.

How to save yourself?

Once the avalanche stops, it settles like concrete. Bodily movement is nearly impossible. If caught in an

Слайд 6Notable avalanches
During World War I, an estimated 40,000 to 80,000

soldiers died as a result of avalanches during the mountain

campaign in the Alps at the Austrian-Italian front, many of which were caused by artillery fire
A large avalanche in Montroc, France, in 1999, 300,000 cubic metres of snow slid on a 30° slope, achieving a speed of 100 km/h (60 mph). It killed 12 people in their chalets under 100,000 tons of snow, 5 meters (15 ft) deep. The mayor of Chamonix was convicted of second-degree murder for not evacuating the area, but received a suspended sentence.