A recent study about fossil water from Lawrence Livermore National Laboratory suggests that drinking wells that pump fossil water can’t rely on the source being naturally replenished. Situations may even worsen during drought seasons. These might be signs of the diminishing fossil waters in California.
Increasingly strong storms are responsible for more than a third of the nation’s flood costs, swelling the tab by billions of dollars a year as climate change continues to fuel more extreme weather, according to new research at Stanford University.
A team of researchers have developed a framework to evaluate complex connections between water and energy, and options for adaptations in response to an evolving climate.
Increased precipitation resulting partially from climate change has caused an additional $2.5 billion a year in U.S. flood damage, according to a new study that pinpoints the effect of changing weather on the cost of natural disasters.
When the Helix Water District received contractor estimates as high as $3.5 million to upgrade the R.M. Levy Water Treatment Plant’s ozone power supply units and generators, it decided to perform the upgrade in-house.
With Suez Water Technologies provided engineering and equipment, Helix employees incorporated new technology and innovative installation practices. The proof of concept pilot project proved the feasibility of the new approach, and a full retrofit is now planned. The estimated upgrade costs to complete the full project is $1.1 million – an approximately 70% cost savings. The upgrade will extend the life of the power supply units and generators at least 15 years.
“The ozone project is our latest example of cost-effective local government,” said Brian Olney, Helix Water District director of water quality and system operations. “In early 2020, Helix staff also standardized the design, hardware, and software of the motor control centers in the district’s 25 pump stations, and that project also saved our customers money, and created long-term operating, maintenance and purchasing efficiencies.”
The ozone generator at Helix Water District’s R.M. Levy Water Treatment Plant in Lakeside. Photo: Helix Water District
The water treatment process at the R.M. Levy Water Treatment plant begins with the removal of dirt and other material suspended in the water. Ozone is then used to inactivate or destroy any organisms in the water. Ozone offers important advantages over chlorine:
Helix Water District’s ozone project team (pre-pandemic) in front of the rebuilt power supply unit. Photo: Helix Water District
Ozone is naturally unstable at normal atmospheric conditions, which is why Helix needs ozone generators to produce it on site. The high voltage generators break down oxygen molecules (O2) and form ozone (O3). The ozone molecules are then diffused in a contact chamber and bubble up through the water to destroy any organisms present.
After ozonation, Helix Water District filters the water and adds a dose of chloramines — chlorine and ammonia — to maintain water quality throughout its 737 miles of water distribution pipelines. The treatment process is managed by a team of highly trained plant operators who conduct 200 water quality tests per day. Chemists and biologists test water samples from both the plant and the distribution system as well.
Sweetwater Authority began a controlled transfer of water between its two reservoirs Monday to bolster a low water level in one of them. Water that leaves Loveland Reservoir south of Alpine will be transferred over the next several weeks through the Sweetwater River channel and captured at Sweetwater Reservoir where it can be treated and distributed to authority customers at a lower cost than importing water. Loveland Reservoir is more than 70% full, while Sweetwater Reservoir’s level is at 20% of capacity.
Chula Vista, Calif. – In order to secure additional water sources for our customers, Sweetwater Authority initiated a controlled transfer of water from its two reservoirs on Monday, January 11, 2021.
On Thursday afternoon, the Eastern Tule Groundwater Sustainability Agency’s Authority Board of Directors hosted a meeting over Zoom, and as part of the agenda the ETGSA approved a contribution to Water Blueprint for the San Joaquin Valley to identify water supplies in the amount of $22,000.
WBSJV has been working to identify the water supplies that might be available to achieve water sustainability in the San Joaquin Valley, including the Tule Subbasin. The ETGSA represents irrigation districts and farmers in southern Tulare County and is part of the Tule Subbasin.
Buried in San Diego County’s lagoons are centuries worth of carbon, cached in muddy stockpiles that scientists say could help combat climate change. Recently, scientists with the conservation organization Wildcoast and Scripps Institution of Oceanography started studying how much carbon coastal wetlands can capture, and how to restore these environments to boost that capacity.
The Water News Network is San Diego County’s source for water news and information.
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