Tag Archive for: Climate Change

How Climate Change Spurs Megadroughts

On an afternoon in late June, the San Luis Reservoir – a nine-mile lake about an hour southeast of San Jose, California – shimmered in 102-degree heat. A dusty, winding trail led down into flatlands newly created by the shrinking waterline. Seven deer, including a pair of fawns, grazed on tall grasses that, in wetter times, would have been at least partially underwater. On a distant ridge, wind turbines turned languidly.

That day, the reservoir, California’s sixth-largest and a source of water for millions of people, was just 40% full. Minerals deposited by the receding waters had turned the reservoir’s lower banks white, like the rings on a bathtub. Discarded clothing, empty bottles, and a lone shoe sat scattered across the newly exposed, parched ground. An interactive graphic in the visitor’s center reported that this year’s snowpack – which provides the water that travels from the Sacramento River Delta into the reservoir itself – was zero percent of the yearly average.

Most Californians View State’s Water Shortage as Extremely Serious, Poll Finds

Most Californians agree the state’s drought situation is very serious, but only a minority of voters say they and their families have been significantly affected by the current water shortage, according to a new poll.

The survey of more than 9,000 voters statewide found that 71% said the state’s water shortage is “extremely serious,” while 23% described it as somewhat serious.

Western States Plan Projects as Water Supply Dwindles

As Mexico and the seven western states that rely on water from the Colorado River Basin struggle to contend with current repercussions of a more than two-decade drought—including federally imposed cuts to water supply in the coming year—they must also plan for a drier future exacerbated by the effects of climate change.

Climate Change Projected to Increase Atmospheric River Flood Damages in the United States

A research team at Scripps Institution of Oceanography at UC San Diego has found that flood damages triggered by atmospheric river storms may triple from $1 billion a year to over $3 billion a year by the end of the century unless action is taken to reduce global greenhouse gas emissions.

Weather Whiplash: Summer Lurches From Drought to Flood

Parts of northern Texas, mired in a drought labeled as extreme and exceptional, are flooding under torrential rain. In a drought.

Sound familiar? It should. The Dallas region is just the latest drought-suffering-but-flooded locale during a summer of extreme weather whiplash, likely goosed by human-caused climate change, scientists say. Parts of the world are lurching from drought to deluge.

World Water Week is an annual event focusing on water issues hosted by the Stockholm International Water Institute. It focuses on exploring new ways of managing water and addressing challenges facing agriculture, technology, biodiversity, and climate change. Graphic: Stockholm International Water Institute World Water Week 2022

World Water Week 2022: Partnership Video Illustrates Value of Groundwater

A new video illustrating the role and the value of groundwater has been released by the Vallecitos Water District.

“The Value of Water: Groundwater” was produced for World Water Week 2022 through a collaboration with the Vallecitos Water District, the California Department of Water Resources, and the U.S. Environmental Protection Agency WaterSense.

World Water Week is from August 23 through September 1. World Water Week is an annual event focusing on water issues hosted by the Stockholm International Water Institute. It focuses on exploring new ways of managing water and addressing challenges facing agriculture, technology, biodiversity, and climate change. This year’s theme is “seeing the unseen, and the value of water.”

Vallecitos Public Information Representative Alicia Yerman, who produced the video, said the goal was to depict the 2022 World Water Week theme. DWR provided photography, and both DWR and EPA WaterSense experts advised on the video and reviewed it for accuracy.

Groundwater is a vital resource

“California’s groundwater basins are a critical part of the state’s water supply, especially during a severe drought like the one we’re currently experiencing,” said Paul Gosselin, Deputy Director of the Sustainable Groundwater Management office at the California DWR. “However, since groundwater is out of sight, it tends to be out of mind for most people. We appreciate Vallecitos Water District’s efforts to educate the public about this vital resource during World Water Week.”

Use water wisely

“It’s so important for people to understand where their water comes from because it helps motivate them to value and use it wisely,” said Veronica Blette, EPA WaterSense program manager.  “This new Vallecitos Water District video highlighting the hidden treasure of groundwater and other videos they have produced do a great job of showing why water is important and how people can preserve and protect it.”

 World Water Week 2022 video   

Groundwater helps sustain California’s ecosystems, supports agriculture, fuels the economy, and reduces the impacts of drought and changing climate. Groundwater accounts for 40% of the state’s total annual water supply in normal years and almost 60% in drought years. DWR developed California’s Groundwater Live featuring the latest groundwater information, live statistics, and a series of interactive dashboards accessed through its website.

In 2019, VWD began using video to document the district’s workforce and infrastructure improvements on its social media platforms. The water district has also engaged the public with discussions of critically important water management issues. It has won multiple awards for its work. The Vallecitos Water District also offers live video of its board meetings and other public discussions on its YouTube channel.

(Editor’s note: The Vallecitos Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)

Opinion: California Faces Existential Threat of a Megaflood

California had been a state for scarcely a decade and was home to fewer than 500,000 people when it was hammered in the winter of 1861-62 by the most powerful series of rainstorms in recorded history.

“This event, which was characterized by weeks-long sequences of winter storms, produced widespread catastrophic flooding across virtually all of California’s lowlands — transforming the interior Sacramento and San Joaquin valleys into a temporary but vast inland sea nearly 300 miles in length and inundating much of the now densely populated coastal plain in present-day Los Angeles and Orange counties.”

No Firm New Deadline for Colorado River Basin States’ Conservation Plans

Federal officials aren’t ready to give states along the Colorado River a new deadline for water conservation goals.

The seven states that rely on the river blew past an August 16 deadline without a plan to conserve 2 to 4 million acre-feet of water. They were given that task by officials with the Bureau of Reclamation and from within the Interior Department. The agency’s models show that amount is what is necessary to keep the river’s biggest reservoirs — lakes Mead and Powell — from reaching critical levels.

Even the strictest drought restrictions allow for watering trees on residential and commercial properties. Photo: Helix Water District landscape trees

Make Landscape Trees a Priority During Drought

As the unprecedented drought continues to affect California and the San Diego region, homeowners can still balance the need to conserve water as efficiently as possible while preserving valuable landscaping, including trees.

Trees can be maintained while following California’s water guidelines. Trees are among the most valuable investment in San Diego County’s landscape – including your own WaterSmart landscaping. No other landscape plant offers more significant benefits to your landscape and the environment. Trees provide much-needed shade and cooling to increasingly hot neighborhoods and cities and are among the most efficient natural ways to remove harmful carbon dioxide fueling global warming.

When mature trees die due to lack of irrigation, they become a dangerous fire hazard. They are expensive to remove. Young replacement trees take many years to provide the benefits of mature trees. Taking care of your trees during drought ensures a tremendous return on this investment.

Long, deep soaks maximize irrigation use

Even when not in an acute drought, trees planted in a Mediterranean climate often need some additional water. Mimic the way Mother Nature provides water for the most effective irrigation.

Healthy tree roots reach three to four feet deep at the outer edge of a tree’s branches, where rainfall would naturally run off leaves. This area at the edge of the tree canopy is called the drip line.

Prolonged, slow soaking

When it does rain, Mother Nature’s rainfall is primarily steady, slow, and spread out. Follow this method to deliver a prolonged, slow soaking. Trees prefer infrequent deep watering. During drought, slow watering every two or three weeks for more established trees is sufficient. Avoid runoff with multiple cycles to allow water to soak deeply. Irrigate early in the morning to minimize evaporation.

Keep in mind turf competes with your trees for water. Even if you want to retain some lawn, it’s smart to remove the lawn immediately around your trees and replace it with WaterSmart landscaping.

Protecting trees from climate change

Carefully selected trees are the most valuable addition to your sustainable landscaping. Photo: Helix Water District landscape trees

Carefully selected trees are the most valuable addition to your sustainable landscaping. Photo: Helix Water District

Drought is a reality in the San Diego region as average temperatures increase. As summer months become hotter, soils dry out. Trees must be deep watered to supply their roots and preserve their health.

San Diego forestry and landscaping professionals are working with the San Diego County Water Authority and its 24 member agencies to help protect our region’s trees while also conserving water. Find more resources and learn more at drought.katestrees.org.

________________________________________________________

WaterSmart Living-Logo-San Diego County Water Authority

(Editor’s Note: The San Diego County Water Authority and its 24 member agencies offer programs, resources, and incentives to improve water-use efficiency for residential, commercial, and agricultural users. WaterSmart choices are a way of life in the region. Stay WaterSmart San Diego! For more water-use efficiency resources, go to WaterSmart.SD.org. The Helix Water District is one of the San Diego County Water Authority’s 24 member agencies that deliver water across the metropolitan San Diego region.)

California Heat Waves In 30 Years Could Be Longer, Hotter and More Frequent, Research Shows

A new report shows what temperatures in the United States could look like in 30 years — and the outlook isn’t good.

The report, from the First Street Foundation, a climate-focused research organization, found that temperatures will likely rise everywhere due to climate change, though the way that is expected to play out varies in different parts of the U.S.