Movie summary- NOVA killer landslides PDF

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Dominique Gallicchio October. 14, 2019 NOVA Killer Landslides Movie Summary:

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Landslideso Landslides can strike more than once. o Landslides occur in every U.S. state. o Some are slow, others are rapid. o Landslides are hard to predict. o Shallow ones involve the top layer soil, on top of rock. o Lidar reveals the scars left behind by past landslides

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10:30am March 22nd, it had been raining for months, a slope slips, a landslide startso The landslide made a terrible sound. o A hillside turned to liquid mud wiping out 49 homes, dammed a river, crossed a highway and kept going. o One square mile buried under 15 to 75 feet of mud, houses were destroyed, anything in its way was picked up or moved. o It was 138 seconds and happened in two phases. o This slope has slid many times in the past and could slide again in the future.

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This wasn’t the biggest landslide, the biggest is centuries old and twice the size as this most recent slide. o Challenge: figuring out how long and how frequent the landslides are in that area. o This slope has a pattern of failing, quiet, and failing again about a decade later. o The slope is a known actor.

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Rescueo There are trained rescuers in the area, but no one was prepared for all the devastation. o Air support. Searches for survivors/bodies using a thermal camera. o No live people, no heat signatures of dead or alive people were found.

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Distal end of the landslideo Everything debris (houses included) were all moved to the far side of the valley. o One home was found hundreds of feet from where it stood. o A woman was buried but managed to push up through the mud and debris. o A young boy was found, his family was buried, when the landslide hit, he was on the second floor. o This landslide was very devastating.

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The 600ft slope slide for a mile, further than the slope had ever slid before. o The head scarp has been retreating back.

Dominique Gallicchio October. 14, 2019

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o It came down in two pieces o The lower half spread out into the valley floor. o The head scarp dropped halfway down the scarp. Afghanistan landslideo Two slides happened o People didn’t have the necessary equipment o Survivors couldn’t find their homes. Understanding why landslides happeno Glacial till- layer beneath lose sand and gravel on top. o How much water the ground can hold until it breaks. Recreating a landslideo Study how a landslide works. o How much rain is too much water? o Add water to soil until it turns to liquid. o Then cracks start to form, and they measure things like the creep and failure. Effects of landslideso Roads are blocked o Villages are cut off from the world. What can you do? o Educate people o Raise awareness o Scientist can monitor certain areas, they can use equipment like crack meters to predict a landslide....