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COASTAL GEOHAZARDS PRECIPITATION INFLUENCED MASSIVE SLOPE FAILURES AND THE CREATION OF THE CRITICAL SLOPE MONITORING RISK INDEXESNormal access

Authors: J. Metzger and S. Borron
Event name: SAGEEP 2019 - 32nd Annual Symposium on the Application of Geophysics to Engineering and Environmental Problems
Session: Case Studies in Use of Geophysics to Evaluate Geohazards and Infrastructure
Publication date: 18 March 2019
Organisations: EEGS, EAGE
Language: English
Info: Extended abstract, PDF ( 1.45Mb )
Price: € 20

Summary:
Events along the Western Seaboard of the United States in late 2016 and early 2017 resulted in numerous rock-fall and landslide events. These were a result of water intrusion at the ridgelines and along already active slope instabilities. Resulting landslides created geohazard events at several locations and resulted in significant economic impacts to local communities and commercial losses in the millions. Critical Slope Monitoring (CSM) systems were deployed at 4 locations, and their immediate impact included the support of ongoing safety, operations, and remediation activities. In the course of these efforts to support operational staff at active failing sites, two CSM indexes created from the data of GbSAR instruments, and the analysis, documentation, and alert processes were established by our monitoring team. The indexes are the first of their kind to be acknowledged, field tested on active deployments, and resulted in advanced warning of imminent failures as well as rock-fall warnings and work distribution categorizations.


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