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Sea level is projected to rise at least 16 inches along the California coast by 2050, with a 55-inch rise predicted by 2100. The primary impacts from sea level rise are increases in flooding and erosion. Sea level rise will expand the area vulnerable to flooding during major storms, as well as in the rare but catastrophic event of a major tsunami.
The term 100-year flood is used as a standard for planning, insurance, and environmental analysis. People, infrastructure, and property are already located in areas vulnerable to flooding from a 100-year event. Sea level rise will cause more frequent—and more damaging—floods to those already at risk and will increase the size of the coastal floodplain, placing new areas at risk to flooding.
2012 Humboldt Bay King Tides Photo Album Launched!
Our Humboldt Bay King Tides Photo Initiative has launched an online photo album featuring over 130 of the best 2012 King Tides photos taken by more than 50 volunteer and staff photographers!
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Written by Molly Samuel, KQED
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2/1/13
Parts of New York and New Jersey are still reeling from Superstorm Sandy, an event that brought climate change and the threat of sea-level rise front-and-center. It's a looming problem for all coastal cities, and one that San Francisco has been pondering since long before Sandy struck.
Along San Francisco’s western shore, the Ocean Beach Master Plan is a kind of test case for sea-rise planning. It calls for big changes, including a strategy known as managed retreat.
A taste of what's to come
You don’t need a crystal ball to see how encroaching seas will affect San Francisco.
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Phase I: Shoreline Inventory, Mapping, and Vulnerability Assessment
A report to the State Coastal Conservancy by Aldaron laird, Brian Powell, and Jeff Anderson.
Click below to download the report:
Humboldt Bay Shoreline Inventory, Mapping and SLR Vulnerability Assessment (PDF, 45 MB)
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Our new Humboldt Bay King Tides Photo Initiative has launched an online photo album featuring over 130 of the best 2012 King Tides photos taken by more than 50 volunteer and staff photographers!
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Read more...
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Written by Paul Rogers, San Jose Mercury News
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12/12/12
If you head down the beach this week, or wander along the edges of San Francisco Bay, you may just be witnessing California's future.
The ocean is getting closer.
This week, California will experience the highest tides of the year, peaking on Thursday morning in a condition known as "king tides." Beaches will temporarily disappear. Water will lap high on docks at marinas.
The gravitational tug of the moon and sun, not climate change, is responsible for the extreme tides. But volunteers with cameras across the state are using the event to document what California could look like in the coming decades as the warming earth continues to raise sea levels.
When people see the high tides this week, scientists hope many will make that connection.
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Written by Kevin Forestieri, HSU Lumberjack
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11/28/12
This year America watched sea levels rise and the ocean flood cities across the east coast in late October. Humboldt County faces a similar threat.
Mid-November to early December is when flood risk is the highest. A storm during the high tides of that time can overtake the dikes around Humboldt Bay, flood the area and cost the county millions of dollars to recover.
The California Coastal Conservancy proposed a $250,000 grant last month for a Humboldt County regional group to make preparations for future floods. The regional group includes the Humboldt Bay Harbor District, Eureka and Arcata. The money will be used to research flood risks and bolster the dike system around Humboldt Bay.
Dan Berman, director of conservation at the Humboldt Bay Harbor, Recreation and Conservation District, said the grant money is necessary to prepare for the future. The Coastline of Humboldt Bay is protected by dikes that are old, and have a history of failure.
“When high tide and storms hit us, we’re protected by earthen dikes that were built 107 years ago,” Berman said.
Aldaron Laird, founder of Trinity Associates, said the earthen dikes were not made with flood safety in mind.
“It’s not that they weren’t engineered well; they weren’t engineered at all,” Laird said. “They just used a dredge to excavate a ditch, then just piled it into a wall.”
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Sea Level Rise
