Hydropower is the world’s biggest source of renewable energy, generating about 16% of the global electricity supply. And it will continue to play a key role as the world looks to meet net-zero targets, not least of all because, like a battery, it can store massive amounts of energy for later and quickly release it in moments of peak demand.
Hydropower is by far the largest renewable worldwide, producing over twice as much energy as wind, and over four times as much as solar. And pumping water up a hill, aka “pumped storage hydropower”, comprises well over 90% of the world’s total energy storage capacity.
But in spite of hydropower’s outsize impact, we don’t hear much about it in the U.S. While the past few decades have seen wind and solar plummet in price and skyrocket in availability, domestic hydropower generation has remained relatively steady, as the nation has already built hydropower plants in the most geographically ideal locations.
The U.S. Department of Energy today announced $8 million in funding to support projects that will improve the flexibility of the U.S. hydropower fleet and enhance electric grid reliability.
Hydropower is a flexible resource, meaning it can supply electricity immediately or store it to meet real-time demand. By improving flexibility, these projects will strengthen hydropower’s ability to support an evolving electric grid that includes an increasing amount of variable renewable energy sources.
When California suffers a heat wave, it leans heavily on hydropower from the Pacific Northwest to keep the lights on.
But that hydropower may not always be available when it’s most needed, as climate change is shifting the ground on which the West’s dams sit. Higher temperatures means snowmelt occurs earlier in the year and leaves less water available for power generation during the depths of summer.
Sprawled like a gigantic swimming pool atop a bluff overlooking Lake Michigan is an asphalt-and-clay pond holding enough water to produce electricity for 1.6 million households.
It’s part of the Ludington Pumped Storage Plant, which uses simple technology: Water is piped from a lower reservoir — the lake, in this case — to an upper one, then released downhill through supersized turbines.
Supporters call these systems “the world’s largest batteries” because they hold vast amounts of potential energy for use when needed for the power grid.
The hydropower industry considers pumped storage the best answer to a question hovering over the transition from fossil fuels to renewable energy to address climate change: where to get power when the sun isn’t shining or the wind isn’t blowing.
(Editor’s Note: The San Diego County Water Authority and the City of San Diego are partnering on the proposed San Vicente Energy Storage Facility project. More information: www.sdcwa.org/projects/san-vicente-pumping-facilities/)
Federal officials say it may be necessary to reduce water deliveries to users on the Colorado River to prevent the shutdown of a huge dam that supplies hydropower to some 5 million customers across the U.S. West.
Officials had hoped snowmelt would buoy Lake Powell on the Arizona-Utah border to ensure its dam could continue to supply power. But snow is already melting, and hotter-than-normal temperatures and prolonged drought are further shrinking the lake.
California’s drought is getting worse — and the drying lakes and reservoirs could severely disrupt the state’s ability to generate electricity ahead of the hot summer months.
California’s energy commission says the state gets 10% of its electricity from power plants at dams along lakes and reservoirs. But when there’s no water, those plants are unable to generate power.
A massive reservoir known as a boating mecca dipped below a critical threshold on Tuesday raising new concerns about a source of power that millions of people in the U.S. West rely on for electricity.
Lake Powell’s fall to below 3,525 feet (1,075 meters) puts it at its lowest level since the lake filled after the federal government dammed the Colorado River at Glen Canyon more than a half century ago — a record marking yet another sobering realization of the impacts of climate change and megadrought.
January 27, 2022 – As partners, the City of San Diego and the San Diego County Water Authority will begin negotiations on a project development agreement with the BHE Kiewit Team to develop Phase 1 of the potential San Vicente Energy Storage Facility Project, which could generate enough energy for about 135,000 households.
The proposed project is subject to a full environmental review and regulatory approvals. If the Water Authority and City of San Diego decide to proceed after completing environmental review, the San Vicente Energy Storage Facility would provide up to 500 megawatts of long-duration stored energy upon completion to help meet peak electrical demands throughout Southern California and help meet California’s renewable energy goals.
As the Colorado River shrinks at the hands of a two-decades-long drought, there’s a lot on the line. The water supply for 40 million people, agriculture, wildlife and hydropower generation are all hanging in the balance as the region grapples with a dwindling river.
The federal agency most involved with the Colorado River and water in the West is the Bureau of Reclamation. The agency’s measurements and actions can lead headlines throughout the region — including the shortage declaration that raised national alarm last August.
The Water News Network is San Diego County’s source for water news and information.
