Rapid Safety Analysis of Yosemite Rockfall Consequences


Alex Wierbinski's picture

By Alex Wierbinski - Posted on 02 July 2018

  

 

GEOLOGY NEWS

Yosemite Rockfalls

Rapid Safety Analysis of Potential Rockfall Consequences

Rapid 3D analysis of rockfalls in Yosemite,
Geological Society of America, June 28, 2018.

Everything in Motion

"Although the cliffs of Yosemite Valley may appear static, rockfalls from these cliffs are common, with a rockfall occurring every four to five days on average."

Big Moves

"On 27 and 28 September 2017, eight large rockfalls occurred from the southeast face of El Capitan. These rockfalls resulted in one fatality and two serious injuries, and spurred a complicated rescue and temporary closure of the main road exiting Yosemite Valley."

Analysis

"Using new "structure-from-motion" photogrammetry techniques in conjunction with baseline laser-scanning data, scientists from the NPS, the U.S. Geological Survey, and the University of Lausanne, Switzerland rapidly analyzed these rockfalls. By comparing 3-dimensional (3D) models of the cliff before, during, and after the rockfalls, the researchers were able to pinpoint the exact locations, dimensions, and volumes of the rockfalls, along with the spatial and temporal pattern of their progression up the cliff."

Decision Making Tool

"Structural assessments enabled by the 3D data indicated low potential for imminent rockfall that could reach the road. By having the necessary baseline data in place prior to the El Capitan rockfalls, these analyses and assessments were carried out within hours of the rockfalls occurring, allowing park managers to make difficult decisions quickly."

 

Recent Rockfall News

Massive Rockfall off El Capitan analyzed above

Geology News 2017: YEAR IN YOSEMITE ROCKFALLS

June 2, 2018, Two Climbers Die on El Capitan

 

 

Mountain Safety News

Geology News

 

 

 

 

June 2018 News of Man & Nature

 

 

 

 

More
Nature News

 

Climate Destruction News

 

Trees

Bee News

Bear News

Spider Forum

Bird News

Small Mammals

Frogs and Reptiles

Butterfly News

 

Health and Fitness

Mountain Safety

Mosquito News

Female Trail

High Sierra History

 

Astro-Phys, Space, & Science News

High Sierra Geology News

Fish, Oceans, & Water News

Anthropocene

 

All High Sierra News

 

 

TOP

 

geology news Yosemite rockfall analysis

 

Powered by Drupal, an open source content management system

Search

Latest News: RSS FEED

Syndicate content

Support Tahoe to Whitney

The Tahoe to Whitney Trail Guide and Magazine are walked, written, funded, and supported by my efforts, with the help of kindred spirits and my sister.

We offer valuable Trail Guide, Skills, Weather, News and Analysis.

My goal is to get you out to see your natural and social potential. Help me keep this unique resource accessible and expanding towards its potential. We've a lot of miles to cover ahead...

I NEED HELP!
If you feel these efforts are valuable, I'm cordially inviting you to support them, here:

 

 

I am currently working towards publishing the completed guide between Tahoe & Yosemite as an e-book, while converting this "blog" to a fine magazine format. You will like the results! Help Tahoe to Whitney reach its potential!

 

Why Support Tahoe to Whitney?
Mission Statement