The Arkstorm
ARkStorm
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Contents
Description
- The Central Valley experiences hypothetical flooding 300 miles long and 20 or more miles wide.
- Serious flooding also occurs in Orange County, Los Angeles County, San Diego, the San Francisco Bay area, and other coastal communities.
- Windspeeds in some places reach 125 miles per hour, hurricane-force winds.
- Across wider areas of the state, winds reach 60 miles per hour.
- Hundreds of landslides damage roads, highways, and homes.
- Property damage exceeds $300 billion, most from flooding.
- Demand surge (an increase in labor rates and other repair costs after major natural disasters) could increase property losses by 20 percent.
- Agricultural losses and other costs to repair lifelines, dewater (drain) flooded islands, and repair damage from landslides, brings the total direct property loss to nearly $400 billion, of which $20 to $30 billion would be recoverable through public and commercial insurance.
- Power, water, sewer, and other lifelines experience damage that takes weeks or months to restore.
- Flooding evacuation could involve 1.5 million residents in the inland region and delta counties.
- Business interruption costs reach $325 billion in addition to the $400 billion required for property repair costs, meaning that an ARkStorm could cost a total of $725 billion, nearly 3 times the amount of damage predicted by the California ShakeOut authors for a severe Southern California earthquake, an event with roughly the same annual occurrence probability.[1]
References
- Porter, Keith; et al. (2011). "Overview of the ARkStorm scenario". USGS Open-File Report 2010-1312.
External links
- USGS Multi-Hazards Demonstration Project: ARkStorm: West Coast Storm Scenario (including video)
- USGS Newsroom: ARkStorm: California’s other "Big One"
- Weather Underground - The ARkStorm: California's coming great deluge
- High Country News: The other Big One, Judith Lewis
- Water Education Foundation, Mar-Apr 2011: Plausible and Inevitable: The ARkStorm Scenario, by Gary Pitzer
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