Category

Featured
blue whale feeding
31
Oct

Blue Whales Consume Microplastic Particles by the Billion

The age of humans, termed the Anthropocene, might just as well be considered the age of plastic. The dangerously durable material, made ubiquitous in products and packaging through the late 20th century, has inundated our planet’s environment. Today, miniscule plastic pieces are present in deep-ocean sediment, high-mountain snow and just about every place in between. Plastic waste has also entered the marine food web, and according to new research, baleen whales are ingesting staggering quantities.  Blue whales off the California coast...
Read More
13
Oct

Sharing Science Across Barriers

Growing up on Chicago’s South Side, an urban landscape of metal and concrete, Miguel Mendez had limited access to open spaces, and always dreamed of traveling. Yet there in the city, he got his first introduction to environmentalism. “In some of the places I lived in Chicago, environmental activists are fighting air pollution and the limitation on parks,” Mendez says. Many of those groups have been there for years, and as he grew up, Mendez internalized the importance of preserving...
Read More
12
Oct

The Long Haul to Restore San Joaquin Spring-Run Chinook

When a team of fish biologists was tasked with restoring spring-run Chinook salmon in the San Joaquin River in 2006, none of them quite knew where to begin. The thirsty farms that crowd the river on both sides had taken almost all the water out of it most years since the mid-1900s, leaving a nearly 60-mile long stretch below Friant Dam near Fresno completely dry. The riverbed had been parched for so long that someone even built a house in...
Read More
12
Oct

Rocky Road to a Fresh Enough Delta

Nothing reveals just how much the upper Estuary’s seesaw of tides and freshwater flows is micro-managed than prolonged drought, and the resulting fiddling with barriers, gates, and water quality standards to prevent the ocean tides and salinity from intruding too far upstream. Come summer, managers begin to talk fearfully of “losing control of the Delta” and the dreaded outcome: salt water too near the export pumps that supply tap water for millions of Californians. The ominous language is also reflected...
Read More
12
Oct

Science in Short: The Hullabaloo About HABS

Dead fish belly up in Lake Merritt and San Francisco Bay this past August sent scientists like Keith Bouma-Gregson scrambling to pinpoint the cause. A harmful bloom of marine algae had taken up residence in the Bay, and while many of the fish died from the resulting lack of oxygen in the water, toxins produced by the algae could have played some role, says Bouma-Gregson, a biologist with the US Geological Survey and regional expert on HABs. The Delta is no stranger to HABs,...
Read More
12
Oct

Key Facility’s Fuzzy Future

There are 14 marine laboratories in California. Just one of them is on San Francisco Bay: the Estuary and Ocean Science Center (EOS), on the rugged eastern shore of the Tiburon Peninsula in Marin County. EOS has trained generations of leading figures in estuary science and management. It possesses a site and facilities that no possible alternative could match. The research community swears by it. And in two years it might close. In the 1970s, after decades as a U.S....
Read More
12
Oct

South Bay Fish Fight

Two decades after the South Bay’s main water supplier agreed to restore aquatic habitat in the streams that flow from its reservoirs, fish in the region remain in dire straits, and local river advocates say it’s the Santa Clara Valley Water District’s fault. The agency, which serves the taps and toilets of 1.9 million Santa Clara County residents, has made some improvements on fish habitat along miles of stream and increased the amount of water it releases from its reservoirs....
Read More
12
Oct

Resurrecting the Carmel River Floodplain

When the storm hit, it was lucky that my parents had a habit of leaving one car on each side of the Carmel River as they commuted from Big Sur into Monterey each day. The 1995 El Niño rainfall had pushed the Carmel River into hundreds of homes, and destroyed the Highway 1 bridge that connected Big Sur with the rest of the world. Most Big Sur residents were trapped during the week it took the Federal Emergency Management Agency...
Read More
12
Oct

Drought Strains Stormwater Monitoring Endeavors

When it rains, it pours. This old saw passes for an apt description of the new precipitation regime that climate change has wrought for the Bay Area: larger winter storms, but fewer of them. The implications of this shift for ecosystems, infrastucture, and water storage are widespread, and often highly visible. But behind the scenes, it is also complicating efforts to monitor pollution inputs to the San Francisco Bay and other local water bodies from stormwater runoff. The Regional Monitoring...
Read More
29
Sep

Of Mice and Marshes: Surveying Salties to Save Them

It’s five in the morning, and Don Edwards San Francisco Bay National Wildlife Refuge remains in the tight velvet grip of night. All is peaceful and quiet, despite the fact that the toll plaza of the Dumbarton Bridge is less than a quarter-mile away. By 5:15, car dome lights and slamming doors have transformed this lonely spot at the watery edge of Newark into a hub of activity. People are taking last sips of coffee, strapping headlamps to their foreheads,...
Read More
30
Aug

Drought Plan Means Full Lake, Empty River

In the mountains and foothills of California, an enduring drought has depleted the state’s major reserves of water. There is virtually no snowpack, and most of the state’s large reservoirs are less than 40 percent full. But in the central Sierra Nevada, a trio of artificial lakes remain flush with cold mountain water. The largest of them, Hetch Hetchy Reservoir, from which millions of Bay Area residents receive water, is more than 80 percent full. This remarkable plentitude is the...
Read More
30
Aug

The Tunnel Plan: Thoughts a Month Later

It’s now five weeks since Governor Newsom’s Delta tunnel plan was unveiled in a Draft Environmental Impact Statement. Time enough for the main ideas to sink in; time enough for familiar players to strike their familiar positions; and time enough for some of us to burrow deep into its tables, figures, and appendices. To recap briefly: water taken from new intakes near Hood on the Sacramento River would enter a tunnel and flow 45 miles underground before being lifted again...
Read More
19
Jun

Finding Her Way to Fish: Denise Colombano

The path into a career is not always a straightforward one. “I hated school. I mean, hated school,” says Denise Colombano, a postdoctoral fellow and Delta Science Fellow working on fisheries research at UC Berkeley. Today, Colombano feels that it is important to talk about her story as a way of encouraging inclusiveness and opportunity within her field — and in the sciences in general.  “I actually flunked ninth grade, and was attending a continuation school, when my science teacher...
Read More
Top Photo: Sailboats crossing under Delta drawbridge. Photo: Caltrans
16
Jun

The Grande Dames of the Delta

The moveable bridges that cross the rivers and sloughs in the Sacramento-San Joaquin Delta were built in the first half of the 20th century, and most are operated by control panels as old as the bridges themselves. A day spent touring these strong-boned grande dames on backwater levee roads or zigzagging across the Sacramento River on scenic State Route 160 is time well spent. But that’s leisure time, and for the tens of thousands of commuters who use the heavily...
Read More
16
Jun

Reorienting to Salmon Recovery

The days when salmon and steelhead teemed in California’s coastal watersheds faded away last century. Today, many populations of the fish are gone or dwindling, the river systems where they spawn drained by diversions or too warm for native fish to survive. Warming trends and drought are squeezing water resources tighter. Nearly all efforts to revive the state’s ailing salmonids have failed, often stalemated by political tensions, and it takes hatcheries and truck transport of juveniles to saltwater to maintain...
Read More
Adrienne Ernst among the Phragmites. Photo: Michael Adamson
16
Jun

Living with a Novel Landscape: Suisun Evolves

Morning at Suisun Marsh is a living watercolor with a soundtrack. Miles of tule and pickleweed populate the foreground, split by canals glinting silver from the sun. In May, the hills undulate across the northern boundary in classic California gold. A red-tailed hawk’s iconic hoarse screech punctuates the insectine buzz as it takes off from a powerline. At 7:40 AM, it’s already 72 degrees and there’s no trace of a breeze. I’ve come to visit the Marsh from downtown Oakland...
Read More
Baldocchi at the end of one of the levees breached to restore tidal action at Dutch Slough. Photo: Janet Byron
16
Jun

Sniffing the Delta for Greenhouse Gases

Dutch Slough in Oakley, on the southern edge of the Sacramento-San Joaquin Delta, is less than a mile from where biometeorologist Dennis D. Baldocchi (above) grew up on his parents’ orchard and fished with pals in nearby Marsh Creek. In October 2021, the California Department of Water Resources breached the levees here, restoring nutrient-rich tidal flows to degraded ranchland. Early in the 20th century, Baldocchi’s father grew dry beans and sugar beets on the peat soils of the Delta’s Liberty...
Read More
Greenbacks
16
Jun

Greenbacks for Blueprint

For the first time in decades, California’s federal estuary management and water quality programs are getting a big bump in bankroll. Priority actions in the newly updated Estuary Blueprint, a 25-action consensus plan for improving the health of San Francisco Bay and the Delta, are poised to take advantage of a new influx of federal money. “We’re fortunate with timing,” says San Francisco Estuary Partnership (SFEP) environmental planner Darcie Luce. Completed this spring, the 2022 Blueprint includes some well-thought-out actions...
Read More
13
Jun

Bagman for Bay Mussels

Martin Trinh practically bounces along the dock at the Coyote Point Yacht Club on a breezy, sunny spring morning. He’s carrying a case full of instruments and scopes out an open slip at the end of the pier. Soon he’s lowering a probe into the water, alongside kelp clinging to the underside of the dock. Another trip back to his Prius, still sporting South Carolina license plates, and he’s got a white plastic dish pan and a scrub brush. He...
Read More
13
Jun

Flow Deal: Peace Treaty or Trojan Horse?

Promising up to 825,000 acre-feet a year of new water to protect endangered fish and thousands of acres of habitat improvements, the Newsom administration and others hailed the March announcement of a proposed voluntary agreement on Bay-Delta flows as the beginning of the end of California’s water wars, and a boon to the Bay-Delta ecosystem.  “We think this has the promise to give us more benefit for ecosystems because we would be combining both flow and habitat assets,” says California...
Read More
1 2 3 9

About Us

The San Francisco Bay-Delta is named in the federal Clean Water Act as one of 28 “estuaries of national significance." For over 20 years, the San Francisco Estuary Partnership has worked together with local communities and federal and state agencies to improve the health of California’s most urbanized estuary.

San Francisco Estuary Partnership 1515 Clay Street, Suite 1400 Oakland, CA 94612 (510) 622-2304

Association of Bay Area Governments