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Updated tsunami hazard maps for Orange County will aid in planning evacuations should such a wave threaten local communities, the California Geological Survey said.
The map is an update of the previous version, which was published in 2009. In Newport Beach, the tsunami hazard zone was increased slightly in the latest map to help facilitate evacuation responses. Hazard zones include the area between the Balboa Peninsula and Pacific Coast Highway, as well as Newport’s Back Bay.
Meanwhile in Bolsa Chica and Huntington Beach, the tsunami hazard zone shrunk after new data showed that levees and ponds can help protect residents.
Steve Hansen
Erosion in Byron Bay appears out of control and may have the potential to threaten the welfare of the town.
Solutions proposed over the years have included building a rock seawall and importing large amounts of sand from elsewhere.
A Council release from April 2021 indicates plans to restore sand dunes by beach scraping, sand trapping, fence restoration and dune revegetation. It is suggested that these approaches will be implemented ‘once the sand rebuilds’.
The rebuilding of the sand appears to be the core of the problem. This may be impeded by the phenomenon of ‘headland bypassing’, which occurs when sand is transported from one beach to another around an obstacle, such as a headland, and, in the absence of the appropriate conditions in terms of wave direction and strength, fails to deposit sand in the area directly behind the obstacle.
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California Geological Survey releases new tsunami hazard maps for Orange County
A tsunami warning siren can be seen in the faux lighthouse at the Marina Park community center in Newport Beach in 2019.
(File Photo)
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The California Geological Survey announced Thursday a new, interactive tsunami hazard map is online for Orange County that officials say can be helpful in planning evacuations should one of the long, high sea waves threaten local communities.
The map is an update of the previous version, which was published in 2009. In Newport Beach, the tsunami hazard zone was increased slightly in the latest map to help facilitate evacuation responses. Hazard zones include the area between the Balboa Peninsula to Pacific Coast Highway and the Newport Back Bay.
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