sea level rise – Enviro Updates

SuzanneMay 1, 2023May 1, 2023Transportationequity, Highway 37, sea level rise, wetlands

Op-Ed: A right way and a wrong way to fix Highway 37

Victoria Brandon, PRESS DEMOCRAT

Everyone agrees that Highway 37 needs fixing.

For nearly a decade, the environmental community has debated plans to restructure Highway 37 between Vallejo and Marin County. Usually, environmental engagement on highway projects focuses on ways to reduce negative impacts, but in this case there is an opportunity for a genuinely positive outcome.

Replacement of the current road with a built-for-resilience elevated causeway would not only protect the highway from flooding, it would reconnect the San Pablo Bay National Wildlife Refuge and other tidal wetlands to San Francisco Bay waters.

Wetlands sequester carbon dioxide, encourage biodiversity by increasing ecologically vital habitat and play a crucial role in meeting the state’s 30 by 30 goals — preserving 30% of land and coastal waters by 2030.

Elevating the highway would also increase the climate resilience of North Bay communities by buffering high-tide events and reducing nearby flooding and by allowing more sediment to flow into San Pablo Bay, which will help protect marshes and communities against sea level rise.

Everyone agrees that Highway 37 needs fixing. Not only does heavy commute traffic and the absence of a transit alternative create daily gridlock, portions of the road become impassable when bay waters are high, and climate change is only going to make that situation worse.

Sierra Club Redwood Chapter activists were therefore disappointed when instead of moving forward with an elevated causeway that its own studies have identified as the preferred alternative, Caltrans proposed an interim fix — an outdated conventional highway-widening project that will reduce traffic congestion and flood risk at best temporarily.

SuzanneSeptember 18, 2022September 21, 2022Climate Change & Energy, Habitats, Transportation, Wildlifebike lanes, bike/pedestrian bridge, flooding, habitat restoration, Highway 37, marsh migration, San Pablo Bay, sea level rise, wetlands

Hwy. 37 could be under water by 2050. Here’s how Caltrans plans to keep traffic flowing

Colin Atagi, NORTH BAY BUSINESS JOURNAL

The favored plan also proposes the route have a 60 mph speed limit, as well as two lanes in each direction with bicycle and pedestrian paths. The plan is in its early stages and officials haven’t identified a cost or funding source.

Caltrans, in order to keep traffic flowing decades from now, intends to build an elevated road along Highway 37 to combat rising water levels, which are expected to eventually inundate the North Bay arterial.

The proposed project essentially stretches across the existing route along San Pablo Bay and through Marin, Sonoma, Napa and Solano counties.

It preserves travel patterns, allows landward marsh migration and is resilient to sea level rises, officials said in explaining its benefits.

SuzanneAugust 24, 2022August 27, 2022Climate Change & Energy, TransportationHighway 37, sea level rise, wetlands

Sea level rise threatens Highway 37; leaders prepare billion dollar plan to stop it

Chase Hunter, NORTH BAY BUSINESS JOURNAL

Highway 37 serves as a key artery of Bay Area traffic from Marin County to Vallejo, but its low-lying place in former wetlands makes it susceptible to flooding and sea level rise over coming decades.

Leaders in transportation will need to address two issues at once to ensure the long-term sustainability of the key corridor: the creation of flood-resistant, sea-level impervious infrastructure and the environmental restoration of the wetlands.

“You can’t do the environmental restoration and address sea level rise without doing the transportation project. And you can’t do the transportation improvement projects without addressing sea level rise,” said Suzanne Smith, the executive director of the Sonoma County Transportation Authority.

SuzanneAugust 11, 2022August 15, 2022Land Use, Transportationflooding, habitat restoration, Highway 37, levees, sea level rise, tidal ecosystem, tidal flow, wetlands migration, wetlands restoration

Wetlands advocates work to raise Highway 37

Dan Ashley & Tom Didion, ABC7 NEWS

There’s a vocal debate over building a better Bay Area, by building a better highway. At stake is not just traffic, but potentially vast stretches of restored wetlands.

When Kendall Webster gazes across the levees and farmland in southern Sonoma County, she can envision the tidal marshes that once flushed water back and forth from meandering waterways to San Pablo Bay.

“And so this whole flatland here was a mosaic of tidal wetlands,” she explains.

It’s a vast expanse of wetlands that the Sonoma Land Trust and their partners are working to restore.

“And you know, California is investing in climate, the way no other state in the country is right now. So we think that this is the natural infrastructure project that the state should be highlighting,” Webster maintains.

To make that vision a reality, the Trust has joined with Save the Bay and more than a dozen environmental and land management groups, urging Cal/Trans and the state to remove the one barrier that could open up natural marshland across the entire North Bay.

SuzanneApril 30, 2022May 3, 2022Climate Change & Energy, Habitats, Wildlifecoastal wetlands, salt marsh, San Francisco Bay, San Pablo Bay, sea level rise

Op-Ed: Expand and restore Bay wetlands to fight climate change

Carin High and Arthur Feinstein, THE MERCURY NEWS

Report must spur us to look at actions we can take to reduce emissions and prepare our communities to adapt

The latest report from the Intergovernmental Panel on Climate Change (IPCC) from the world’s scientific community leaves no doubt that we must take urgent action on climate change while we still have a chance to prevent the most destructive impacts to the globe’s communities and ecosystems. This report must spur every one of us to look at actions we can take in our region to rapidly reduce emissions and prepare our communities to adapt.

More than issuing a wake-up call, this report offers concrete actions that we can take and emphasizes the valuable role of nature-based solutions that reduce climate change risks, while providing numerous benefits to both our communities and the planet.

One of the most effective nature-based solutions is the expansion and restoration of coastal wetlands. Wetlands not only provide valuable habitat for fish and birds, acting as the base of the marine ecosystem, but wetlands have also been shown to be one of nature’s most efficient plant communities for capturing carbon from the atmosphere, trapping organic carbon quicker and better than forests, thus reducing carbon in the atmosphere.

Coastal wetlands also help to buffer our communities from sea level rise, acting as a sponge to capture flood waters before they reach our homes and businesses. In short, wetlands, if protected, expanded and restored, are one of the most valuable ecosystem tools for reducing the impact of climate change.

SuzanneJanuary 25, 2022Climate Change & Energy, TransportationHighway 37, sea level rise

Highway 37, a major Bay Area corridor, could be fully underwater as soon as 2040

Joshua Bote, SFGATE

Route 37 PEL Meeting Jan 25 2022 (Caltrans)

California State Route 37, the major throughway that bridges the divide between Highway 101 and Interstate 80 and serves thousands of drivers daily in the North Bay, is in dire straits.

A recent dispatch from the California Department of Transportation warns that nearly the entire route — spanning Novato to Vallejo — could be “permanently submerged” as soon as 2040 by increasing weather crises and rising sea levels caused by climate change.

Its proximity to the San Pablo Bay makes this route especially vulnerable. The marshlands in the bay, while vital for preventing flooding, are in a precarious state, with a 285-foot-wide levee only being breached in 2015, after the area had been drained and used as farmland for decades. The marshlands in that area still require decades to fully establish.

If left unchanged, the effects will be severe, Caltrans warns. Alternate roads will be clogged up, worsening traffic on other Bay Area highways. Caltrans also warns that “economic loss and reduced opportunity” for Solano County residents could be major impacts.

Already, the impacts of rising sea levels are evident on the highway, with closures popping up more and more in recent years.

Caltrans and affected Bay Area counties have worked over the past decade to shore up Highway 37, with multiple studies conducted and crews working to raise pavement on the highway. Another one, called the Planning and Environmental Linkages (PEL) study, is set to begin this month and is expected to be the most comprehensive look into the corridor.

SuzanneNovember 8, 2021November 16, 2021Climate Change & Energy, Land Use, Waterpermeable surfaces, sea level rise, stormwater, swales, wetlands restoration

Reimagining coastal cities as sponges to help protect them from the ravages of climate change

Elena Shao, INSIDE CLIMATE NEWS

Infrastructure experts in the San Francisco Bay Area have begun replacing impermeable roads and stormwater drains with water gardens and restored marshlands.

As an environmental officer in Samoa, Violet Wulf-Saena worked with the Lano and Saoluafata Indigenous peoples to restore coastline mangrove ecosystems that could slow incoming waves and protect communities from storm and flood damage.

Two decades later, in California’s San Francisco Bay Area, she’s the director of a nonprofit called Climate Resilient Communities that works on the same issue: restoring marshlands and wetlands to better protect vulnerable neighborhoods in low-lying areas from sea level rise.

Some areas of the Pacific Islands, where Wulf-Saena grew up, are projected by conservative estimates to see the sea level rise 10 inches by mid-century. By then, East Palo Alto, about 30 miles south of San Francisco, where Wulf-Saena works now, may also be frequently underwater during high tide events.

“Nature is the best protection to sea level rise, and if we restore these ecosystems we can mimic a lot of that protection,” she said. “It can be like a sponge.”

Most aspects of the built environment in the modern city are designed to drain away water as quickly as possible. Rain slides off of roofs, over concrete and asphalt and down into sewers, where it’s then redirected to the sea, lakes or rivers. The traditional approach to large water events like floods and storm surges has been to engineer the water out of the way, using seawalls, levees and flood barriers.

This means that cities like San Francisco could face billions of dollars in flood and storm damage as climate change worsens and overwhelms that infrastructure, all without capturing and reusing a lot of that water, which could ease some of California’s periods of drought.

Now, infrastructure experts are pushing for urban spaces to be reimagined as sponges—not just by restoring marshlands, but also with more parks and gardens soaking up stormwater, pebbles underneath surfaces acting as natural filtering systems and a more porous type of concrete absorbing water and slowing it down.

SuzanneJuly 16, 2021July 28, 2021Climate Change & Energy, TransportationHighway 37, sea level rise

Higher tides will threaten Bay Area roads. Highway 37 shows the challenge ahead

John King, SAN FRANCISCO CHRONICLE

It is by no means the only one. All along San Francisco Bay, low-lying roadways and rail lines face the potential of being flooded as sea levels rise and the bay expands.

“This is a much bigger thing than most people realize,” said Randy Rentschler, director of legislation for the Metropolitan Transportation Commission. “The whole area is a transportation network at risk.”

That risk is the result of generations viewing the shoreline’s shallow tidelands and mudflats as easy places to build the infrastructure required by a growing region, including highways and railroad tracks lines. The assumption was that the bay was locked in place — portions could be filled in, but it would never grow.

That assumption didn’t take into account larger changes in the climate triggered by global temperatures that have climbed steadily since 1980 and show no signs of leveling off.

As a result, a study last year by state and regional agencies said the combination of higher tides and rough storms in coming decades could upend travel in all nine Bay Area counties.

SuzanneMarch 16, 2021March 26, 2021Climate Change & Energy, Sonoma Coastequitable solutions, sea level rise

The coming tide: North Bay cities grapple with sea level rise

Cole Hersey, THE NORTH BAY BOHEMIAN

The air was still in early January when my father and I took his kayak onto the waters of San Rafael’s Canal neighborhood. Thin layers of oil floated on the water. Occasionally a plastic bottle or tennis ball bobbed by.

The sky was overcast, a drab blue-gray that nearly matched the color of the three-story apartment complex protruding out into the waters. Though it was cloudy, it was unseasonably warm and humid. It didn’t feel like a normal January day in San Rafael.

As we paddled between ducks, watching people walk around Pickleweed Park along the edge of the water, I imagined what this place might look like in 30 years. It was easy to see how a small rise in the sea could impact this community. All it would take is one big storm.

In the 1870s, tidelands in Marin County were auctioned off to developers. Over the course of more than a century, many of those plots were filled in to create space for new city infrastructure and other developments.

This scenario was not uncommon in the Bay Area. According to Baykeeper, a nonprofit focused on protecting the San Francisco Bay from pollution, 90 percent of all Bay Area wetlands have been “lost or seriously degraded” after being dyked and used for developments. However, due to rising oceans, the dykeing of wetlands now seriously threatens many wild and urban spaces across the region.

San Rafael’s Canal neighborhood is one such place; a small, yet populous, neighborhood located east of downtown where most households are low-income, and 85 percent of residents are Latinx. Built as a navigable waterway in the early 1900s, it is now mostly used for kayakers and other recreational boaters.

It is here where conservationists, community advocates and civil servants are working together to find solutions to the growing issue of sea level rise. And while this is a global issue, there is “little to no federal guidance” for addressing climate issues, the Brookings Institute recently noted. This lack of centralized guidance has left cities and states to lead the way when it comes to adapting to climate change.

SuzanneJanuary 20, 2021January 30, 2021Climate Change & Energy, Habitats, Water, Wildlifehabitat restoration, marsh migration, salt marsh, San Pablo Bay, sea level rise, Sonoma Creek, wetlands

A struggling California marsh gets an overhaul to prepare for rising seas

Alastair Bland, AUDUBON MAGAZINE

The restoration of the Sonoma Creek in the San Francisco Bay Area not only corrects problems of the past, but also looks to the future.

The sun shines meekly through a veil of morning fog and wildfire smoke while several figures in orange vests, hard hats, and face masks move slowly through a marsh on the north shore of San Francisco Bay. Wielding brooms, they jab lightly at the vegetation, ruffling the tufts of native pickleweed. As biological monitors, their job is to flush out small animals—especially the endangered salt marsh harvest mouse—and usher them from the path of a rumbling excavator, which is about to dig a deep groove in the slick mud.

It’s early October at the mouth of Sonoma Creek, where an unusual conservation project that broke ground five years ago is nearing the finish line. Audubon California and partner agencies are turning what was once a 400-acre stagnant backwater into a thriving wetland ecosystem that will serve as a refuge from rising seas for decades to come.

This revitalization of Sonoma Creek marsh is more a story of creation than one of restoration. The place is a product of the Gold Rush era, when torrents of unearthed sediment choked the Sacramento River system and later settled downstream. While hawks, grebes, and plovers made use of the area, which is managed today as part of the San Pablo Bay National Wildlife Refuge, the marsh wasn’t exactly a haven. The unnatural mud buildup was too rapid, preventing the formation of the channel systems that typically run through wetlands like arteries and allow a healthy water exchange with adjacent bays and estuaries. “If this was a natural marsh, it would look like a lung—it would breathe,” says Andrea Jones, director of bird conservation at Audubon California.
Continue reading “A struggling California marsh gets an overhaul to prepare for rising seas”

Environmental Center of Sonoma County

Tag: sea level rise