Category Archives: coastal hazards

Despite speculation, scientists see no Fukushima radiation risk in albacore

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Japan’s nuclear disaster released hundreds of millions of gallons of radioactive water in 2011, sparking rampant speculation that a contaminated plume would reach the waters of North America’s West Coast.

Three years later, such speculation is alive and well on the Internet. But scientists in Oregon and California have collected samples of tuna, a fish known to migrate back and forth across the Pacific, analyzed them for radioactive isotopes, Cesium-134 in particular, from Fukushima – and found levels so low they are barely detectable.

Delvan Neville labels albacore samplesDelvan Neville, a PhD candidate in Radiation Health Physics at Oregon State University, has tested dozens of samples of albacore tuna for radioactivity. The U.S. Food and Drug Administration’s intervention levels for cesium 134 and cesium 137 is 1200 becquerels per kilogram. The highest levels he’s seen in his albacore, of both cesium 134 and cesium 137 combined, is 1 becquerel per kilogram – a level so low that his device couldn’t pick it up until he concentrated the samples.

“That’s more than 1,000 times lower than the point where the FDA would even think about whether they need to let people eat that food still,” he said.

Neville, along with OSU fisheries graduate Jason Phillips, is working with Dr. Lorenzo Cianelli, a marine biologist with OSU’s College of Earth, Ocean and Atmospheric Sciences , to learn more about the migration patterns of Pacific albacore. Their initial work was funded in part by Oregon Sea Grant and NOAA.

It was only the timing of their research – coinciding with the 2011 Tohoku earthquake and subsequent nuclear disaster – that led the scientists to consider radiation as a possible marker for learning which waters fish caught off the US Pacific coast might have traveled.

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Highest-risk town faces up to tsunami threat

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Modeling tsunami wavesSEASIDE – Scientists agree that the “big one” — an earthquake reaching  magnitude 9.0 or higher — has a 10 to 15 percent chance of striking somewhere off the U.S. west coast in the Cascadia Subduction Zone within the next 50 years. Fifteen to 20 minutes later, a tsunami will move in and drown many coastal communities.

Geologists consider the town of Seaside – much of which sits at sea level –  “the highest-risk community on the Oregon coast,” said Yumei Wang, a geotechnical engineer at the Oregon Department of Geology and Mineral Industries.

Little wonder that earthquake and tsunami preparedness is one of the Seaside School District’s main selling points for bond measure 4-168, which would fund a new $128.8 million K-12 campus to be built in the wooded hills east of Seaside Heights Elementary School. In the event of a natural catastrophe, the building housing the schools would double as an emergency shelter for the community.

These two concerns — a new learning environment for schools above the 80-foot tsunami inundation zone and the need for a refuge from a Japanese-style disaster — are the basis for SAFE (Support a Future for Education), a political action committee formed to generate support for the bond.

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Groups sought to monitor marine debris on Oregon coast

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The Oregon Marine Debris Team is seeking volunteer groups to participate in a community grants program which will support monitoring for marine debris. Up to 10 local groups (either existing organizations or teams that unite for this effort) will be awarded $500 to assist them in regularly monitoring and submitting reports on marine debris that washes up at selected sites on the Oregon coast.

The project is part of an ongoing research program of the National Oceanic and Atmospheric Administration (NOAA). Participating groups, using NOAA protocols, will be expected to gather data at regular monthly intervals on the types and amounts of marine debris reaching the shore at 10 small monitoring sites from the mouth of the Columbia River south to near the California border.  Once they’ve collected the information, volunteers will be expected to upload it to a website for NOAA analysis.

The team hopes to have one monitoring site within each of 10 regions, spanning the length of the coast; preference will be given to proposals for more remote areas with less human traffic and where it is less likely that litter will be picked up between monitoring sessions.

For information about how to submit a proposal, visit the OMDT blog.

No prior experience is necessary. Training and support will be provided by the OMDT, a partnership among four non-profit organizations—Surfrider, SOLVE, Washed Ashore and the CoastWatch program of the Oregon Shores Conservation Coalition—with the cooperation of Oregon Sea Grant.

 

 

Tsunami debris curriculum teaches about marine invaders

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Workers clean live species from Japanese dock washed up on Agate Beach, 2012A new curriculum from Oregon Sea Grant uses lessons from the 2011 Japanese tsunami – and subsequent arrival of large docks and other artifacts of the disaster on US shores – to teach about science, engineering – and the risks posed by foreign species hitching a ride on floating debris.

Developed by Sea Grant’s Watershed and Invasive Species Education (WISE) program, the curriculum was tested at several workshops this year where teachers had a chance to experience activities focused on getting students and teachers excited about STEM (Science Technology Engineering and Math) learning. Along with teaching about marine invaders, the activities looked at the power of tsunami waves, and how engineering can make shorefront communities more resilient to such disasters.

The entire curriculum is available, free, from Oregon Sea Grant’s Website.

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Two new curricula available from Oregon Sea Grant

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Tsunami evacuation signOregon Sea Grant has recently published two new curricula. Both are available online.

Tsunami STEM Curriculum–uses Ocean Science Systems as pathways to stimulate STEM (Science, Technology, Engineering, and Math) learning to guide students in decision making. Students immerse into STEM through understanding the causes and consequences of a natural disaster such as a tsunami or bioinvasion, learn about their risks, and explore choices and consequences of responses to and preparation for tsunami hazards. http://seagrant.oregonstate.edu/sgpubs/e-13-003

You’re Excluded! An Activity Exploring Technology Changes in the Trawl Industry–includes objectives, method, materials needed, information on trawl fishing, pictures of nets, procedures, activity options, and discussion questions. It also includes instructions on incorporating engineering designs standards for kindergarten through high school. http://seagrant.oregonstate.edu/sgpubs/e-13-002-trawl-industry-curriculum

TERRA: Scientists and Engineers Plan for the Big One

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Terra Magazine cover“The last great earthquake to strike the Pacific Northwest occurred on January 26, 1700, at about 9 p.m. Parts of the coastline dropped three to six feet in an instant. It set off landslides throughout the Oregon Coast Range. Some of them are still moving. If you could hear soil, rocks and trees creep inch-by-inch downhill, some of those sounds would echo that massive jolt. At sea, it generated tsunamis that reshaped the Northwest coastline, traveled across the Pacific and swept through bays and coastal communities in Japan. …”

The latest issue of Terra, Oregon State University’s research magazine, delves into the ways in which OSU scientists and engineers are helping the state prepare for the next big Cascadia Subduction Zone earthquake, which a growing number of researchers calculate could happen within the next 50-100 years. Learn how such a powerful near-short “megathrust” quake could affect the state and region, and what’s being done to plan for, and mitigate against, such disasters.

The spring edition also looks at how people like Oregon Sea Grant’s Tim Miller-Morgan care for the fish and other aquatic animals that make up more than 80 percent of the animals used in the university’s research labs and the public exhibits at the Hatfield Marine Science Center. The past few decades have witnessed great changes in how institutions like OSU treat the animals in their care; as Miller-Morgan puts it, ““Now we understand that we shouldn’t look at these animals as disposable. We brought them into captivity, and we have an obligation to keep them as long as we can, as close to their natural lifespan as possible — or even longer.”

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Live fish, crabs, survive post-tsunami trip aboard Japanese boat

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Oplegnathus-fasciatus-WDFW-photox250Scientists at Oregon State University’s Hatfield Marine Science Center are examining a handful of Japanese fish that may have survived a nearly two-year trip aboard a small fishing boat torn off the Japanese coast by the 2011 tsunami.

The fish – Oplegnathus fasciatus, known as Barred knifejaw or Striped beakperch – were found in the bottom of a Japanese boat that washed ashore at Long Beach, WA on March 22. The vessel is one of a growing number of large items cast to sea by the Japanese tsunami that have made their way across the ocean to Pacific Northwest shores.

Sam Chan, Oregon Sea Grant’s invasive species specialist, said the fish species normally are found only as far east as Hawaii. Scientists aren’t yet sure whether the fish traveled all the way from Japan, or if they somehow got onboard the derelict vessel as it crossed the ocean. “Either way, it’s an interesting case of organisms ‘rafting’ across the ocean,” Chan said.

OSU’s Jessica Miller, a marine fisheries ecologist with the HMSC-based Coastal Oregon Marine Experiment Station, as four of the fish and is examining their stomach contents and otoliths (specialized bones found in the ears of fish and other species) for insight into what the fish had been eating and the environmental conditions they encountered during their transit. The fifth fish is on display at the Seaside Aquarium.

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Japan Times: Washed-up dock stirs awareness in Oregon

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NEWPORT  – When a massive dock drifted across the Pacific Ocean from Japan to the U.S. West Coast after the Great East Japan Earthquake, it brought along more than the invasive “wakame” kelp and mussels that were attached to it. The city of Newport, Oregon, where the docked beached itself last June, noticed the high interest it was generating and put it to good use.

Oregon Sea Grant’s Mark Farley, manager of the Visitor Center at OSU’s Hatfield Marine Science Center, describes how a piece of a 20-meter, 100-ton concrete and metal dock, ripped from its moorings in Misawa, Japan by the devasting 2011 earthquake and tsunami and deposited over a year later on the Oregon coast, is serving as a tool to educate visitors and coastal residents about our own risks of disaster.

Read the complete story in the KYODO/Japan Times

Tsunami dock piece to be dedicated March 10

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Cleaning the tsunami dock (Photo: OSU Hatfield Marine Science Center)NEWPORT – A new tsunami awareness exhibit, featuring a piece of the massive Japanese dock that washed ashore at Agate beach last year, will be dedicated at OSU’s Hatfield Marine Science Center in a public ceremony and grand opening on Sunday, March 10.

The public ceremony, which runs from 2-4 pm,  marks the two-year anniversary of the devastating earthquake and tsunami that hit northern Japan. Sponsors include Oregon Sea Grant, the HMSC and the City of Newport.

The dock was among the first – and largest – fragments of debris to wash up on Pacific Northwest shores more than a year after the magnitude 9.03 undersea megathrust earthquake off the coast of Japan on March 11, 2011. The dock’s arrival on Agate Beach last June, sparked concern over the potential spread of non-native plants and marine animals, thousands of which were found alive and clinging to the dock.

Teams of state Parks and Recreation workers, scientists and volunteers scoured the dock’s surface and scorched it with blow-torches to destroy the organisms – and also collected specimens for identification and analysis by researchers at the HMSC.

The dock, roughly the size of a railroad boxcar and weighing tons, was sawn into pieces for disposal, and one section was saved to be placed at the Hatfield Center as a memorial to the Japanese disaster – and to aid in educating visitors about the risks of similar tsunamis generated by subduction zone quakes off the Oregon coast.  On initial delivery, however, the concrete-and-steel segment was discovered to be too big for its site, and was hauled to the Port of Newport docks to be recut to fit the space.

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Oregon Sea Grant publishes booklet on drinking-water systems in coastal Oregon

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The following publication is available as a free download from Oregon Sea Grant.

The print version may be purchased from Oregon Sea Grant’s e-commerce store.

Planning for Resilience in Oregon’s Coastal Drinking Water Systems

On Oregon’s rugged coast, large-scale infrastructure for public utilities is virtually nonexistent, meaning that drinking water must be obtained through small systems, domestic wells, or springs. While a portion of Oregon’s coastal population utilizes a domestic or private source, the vast majority of residents rely on small public systems for their drinking water. Unfortunately, risks associated with small drinking-water systems are not widely documented nor well understood.

Planning for Resilience in Oregon’s Coastal Drinking Water Systems is the result of case studies of 13 drinking-water sytems in coastal Oregon. It examines risks to these systems including infrastructure issues, contamination, climate change, earthquakes, and tsunamis, and explores actions to increase resilience, such as planning, backup supply, source water protection, infrastructure improvements, and communication. The publication will be of value to coastal water system managers, city planners, and coastal residents interested in water supply issues.