Tag Archive for: Climate Change

Can Water Megaprojects Save The US Desert West? (Part 2)

/in , /by /CleanTechnicaby Jennifer Sensiba

In part one of this article, I covered the American West’s water problems, as well as some of the ways they have been solved with big engineering projects so far. Now, with climate change and growth both pushing the limits of water supplies, people are asking for even bigger projects, like a pipeline from the Mississippi River to somewhere in the Colorado River’s basin. Let’s talk about those ideas, even bigger ones, and why none of them might be a good idea.

Arizona state legislators asked Congress to consider a pipeline that dumps Mississippi water into the Green River, but there are alternate possibilities.

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

Trees: Landscaping MVP (Most Valuable Plant)

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New waterwise landscaping represents a significant investment in time and cost. Trees stand out as the most valuable players in your landscape design. No other landscape plant offers greater benefits to your landscape and the environment as a whole.

Trees save energy and clean the air.  They counteract the urban heat island effect and fight climate change. Trees provide property protection and improve property values. Neighbors with more trees even have lower crime rates.

Investing in tree maintenance is vital to keep them healthy. Tree pruning should only be done for a specific reason. First, for corrective or preventative measures.  Second, to remove dead, crowded, or poorly angled branches or to reduce potential hazards. Third, to increase light and air penetration for healthy growth.

Tips from pros on pruning and thinning trees

Trees are the most valuable players in your landscape design, and you can keep them healthy by using proper pruning techniques. Photo: Benjamin Balazs/Pixabay

Trees are the most valuable players in your landscape design, and you can keep them healthy by using proper pruning techniques. Photo: Benjamin Balazs/Pixabay

Routine thinning does not always improve the health of a tree. Removing large amounts of foliage all at once can put stress on a tree’s stored energy reserves, resulting in stunted growth.

Pruning should be performed in the best season for the tree to avoid potential disease and to avoid pruning just after the spring growth flush.

There should be a purpose for each cut, as each cut into a tree can change the growth of the tree for many years to come. Improper or careless pruning can cause damage over the life of the tree. It is important to know where and how to make cuts before beginning the process.

When a tree branch is cut, it compartmentalizes the wound to protect itself. A small cut does less damage than a large cut. Waiting to prune a tree until it is mature can create the need for large cuts, which can threaten the life of the entire tree. Ongoing and regular maintenance is a must.

Call on a certified arborist to maintain your trees in optimal health. Arborists are specialists trained in the art and science of planting, caring for, and maintaining individual trees. They can identify and treat diseases before they spread to other trees. Find qualified professionals at the International Society of Aboriculture and the American Society of Consulting Arborists.

This article is part of a year-long series inspired by the 71-page Sustainable Landscapes Program guidebook. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org. 

As the Climate Warms, Electricity Demand Shows a Regional Shift

/in , /by /pv magazineby Ryan Kennedy

Even though American spent more time at home in 2020 during the Covid-19 pandemic lockdown, retail residential sales of electricity per capita rose by only 1% per person, year-on-year from 2019 to 2020, said the Energy Department’s Energy Information Administration. The agency said that warmer weather in 2020, especially a particularly mild winter, increased electricity usage from air conditioning, but cut U.S. electricity usage for space heating during colder months.

EIA reported that from 1960 to 2010, per capita U.S. electricity use posted a 3% average annual increase. That trend slowed over the past decade due to warmer weather and energy efficiency upgrades. Since 2010, per capita residential electricity use has fallen 5% in the U.S.. That means 2020 represented an uptick in demand relative to the broader trend.

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Pure Water Oceanside Project to Receive $1.7 Million Federal Grant

/in , , /by /Times of San Diego by City News Service Mentioned: San Diego County Water Authority

The Secretary of the Interior will be recommending a $1.7 million grant award for construction of the Pure Water Oceanside project, it was announced Friday.

The funding will be awarded via the Bureau of Reclamation’s WaterSMART: Title XVI WIIN Water Reclamation and Reuse Projects funding opportunity. Oceanside is one of 11 applicants named in the federal appropriations process for this funding.

“We are excited to continue working with the Bureau of Reclamation on Pure Water Oceanside,” said Cari Dale, Oceanside’s water utilities director. “Their continued support along with multiple grant, loan and incentive programs through the EPA, the Department of Water Resources as well as Metropolitan Water District and the San Diego County Water Authority continue to make local water supply development affordable for the city of Oceanside customers.”

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‘Code Red’: UN Scientists Warn of Worsening Global Warming

/in , , /by /AP Newsby Seth Borenstein

Earth is getting so hot that temperatures in about a decade will probably blow past a level of warming that world leaders have sought to prevent, according to a report released Monday that the United Nations called a “code red for humanity.”

“It’s just guaranteed that it’s going to get worse,” said report co-author Linda Mearns, a senior climate scientist at the U.S. National Center for Atmospheric Research. “Nowhere to run, nowhere to hide.”

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Water Cutbacks Coming to Arizona

/in , , /by /Arizona Public Mediaby Christopher Conover

The “bathtub ring” at Lake Mead has become a familiar sight. The water level in the lake is the lowest it has been since the Hoover Dam, which created the lake, was built in the 1930s. Those low levels have been decades in the making.

“Back in around 2000, Lake Mead was pretty close to being full, but over the last 20 years-plus now we’ve just not had good hydrologic conditions. It will take years to recover from that, years of good conditions and unfortunately the climate models and projections don’t predict us getting cooler and they don’t predict us, let’s say, getting wetter,” said Dr. Sharon Megdal, University of Arizona professor and former board member for the Central Arizona Project.

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Study Reveals Effects of Extreme Heat on Tens of Millions of Americans

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The summer of 2020 brought fear of Covid-19, social distancing – and heat-related health problems that affects tens of millions of Americans.

During those months, more than a quarter of the US population suffered from the effects of extreme heat, according to a study released this week. People reported health symptoms like nausea and cramps, as well as a decreased ability to focus, and the effects hit low-income households the hardest.

The study focuses on last summer but given the brutal heatwaves that have hit the US in 2021, especially in western states, it raises the prospect that the impact of extreme heat is highly likely to be worse this year.

Big Battle Looms Over California Water Rights

/in , , /by /CalMattersby Dan Walters

California doesn’t have enough water to meet all demands even in wet years, and when drought strikes the competition becomes, to put it mildly, intense.

State and federal officials who must ration the restricted supply are beset with pleas from farmers, municipal water systems and advocates for the environment.

However, water managers must also contend with a bewildering array of water rights, some of which date to the 19th century, as well as long-standing contractual obligations and laws, both statutes and judicial decrees, on maintaining flows for spawning salmon and other wildlife.

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Drought Hits South American River, Threatening Vast Ecosystem

/in , /by /AP Newsby Victor Caivano and Almudena Calatrava

The Paraná River, one of the main commercial waterways in South America, has reached its lowest level in nearly 80 years due to a prolonged drought in Brazil that scientists attribute to climate change.

At peril is a vast ecosystem that includes potable water for 40 million people, the livelihood of fishing communities and farmers, and the navigability of a major grain export hub.

The National Water Institute of Argentina has defined the low water level of the Paraná River, which goes through Brazil, Paraguay, and Argentina, as “the worst since 1944.”

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General Manager Issues Statement Urging Region to Stay WaterSmart

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Aug. 6, 2021 – San Diego County Water Authority General Manager Sandra L. Kerl today issued a statement in response to deteriorating water supplies across the West, highlighted by state officials taking the powerplant offline at Lake Oroville due to low reservoir levels and regulators restricting farmers’ access to Central Valley rivers.

“These developments are sobering reminders of the serious conditions facing residents, farms and businesses across the West. In support of regions where water supplies are severely strained, I urge San Diegans to do their part by voluntarily reducing use of our most precious natural resource by 15%, as called for by the governor.

“We have collectively done a great job developing new water supplies and reducing water use across the county – and we should remain vigilant in our efficient use of water. Some examples of actions people are taking to do their part include fixing leaks in irrigation systems and plumbing fixtures; irrigating in the morning or evening when temperatures and winds abate; washing only full loads of laundry and dishes; patronizing car washes that recycle water; using hoses with automatic shut-off valves; and using pool covers and garden mulch to reduce evaporation. Water-use efficiency information and incentives are at www.watersmartsd.org.

“By doing our part to stay WaterSmart, we will help California weather this extremely dry year and prepare for the uncertainties of the future.”

— Sandra L. Kerl, General Manager, San Diego County Water Authority

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