You are now in Conservation Corner Features category.

Beeblossom (Gaura) shrubs are a good low water use landscaping choice based on its Plant Factors rating. Photo: Water Authority

Knowing Your Plants’ Water Needs

/in , /by

Landscaping professionals use a resource called the Water Use Classification of Landscape Species (WUCOLS) to classify plants according to their water needs.  

It might sound really complex, but it’s really useful because it breaks down the water requirements for each type of plant into four categories: Very Low, Low, Moderate, and High. These water requirements are also called Plant Factors, and they are an important tool for transitioning to a more water-efficient landscape. 

Water Requirements by Plant Factors 

To come up with a Plant Factor for a given plant, that plant’s  water use is compared to cool season grass in a given climate zone.  

Why is that? Turf is among the thirstiest of all types of plants. When you replace turf areas with climate-appropriate plants with lower water requirements, and irrigate them with more efficient systems, you can realize a tremendous amount of water savings. There is no need to turn your landscaping into a dry, brittle moonscape to do it.  

Here are the Plant Factors, or PF, categories:  

Plant Factor categories from high to low water use. Graphic: Water Authority

Plant Factor categories from high to low water use. Graphic: Water Authority

High: These plants need from 60 to 100 percent of the water needed for a grass lawn (PF of 0.6 – 1.) 

Moderate: Plants need 30 to 60 percent of the water needed for a grass lawn (PF of 0.3 – 0.6) 

Low: Plants need 10 to 30 percent of the water needed for a grass lawn (PF of 0.1 – 0.3) 

Very Low: Plants need 10 percent or less of the water needed for a grass lawn (PF of less than 0.1) 

Group Plants by PF to Irrigate More Efficiently 

In the Water Authority’s Sustainable Landscaping guidebook, plant selections are color-coded to identify their water needs under this system. That approach provides an easy way to group plants by their water requirements in your landscape, so you can irrigate more efficiently.  

This article was inspired by the 71-page Sustainable Landscapes Program guidebook available at SustainableLandscapesSD.org. The Water Authority and its partners also offer other great resources for landscaping upgrades, including free WaterSmart classes at WaterSmartSD.org.   

 

 

  

Here’s How The Largest Dam Removal Project In The U.S. Would Work

/in , /by /Water Deeply (New York)by Tara Lohan

No one is popping the champagne corks just yet, but the process to remove four hydroelectric dams on the Klamath River just took a big step forward. On June 28, the Klamath River Renewal Corporation released the Definite Plan for the Lower Klamath Project, a 2,300-page detailed analysis of how the reservoirs would be drawn down, the dams removed, the materials disposed of and the formerly inundated land restored.

Full Story
San Vicente Aqueduct

1954: Final Pipe Installed for Pipeline 2, San Vicente Aqueduct

/in , /by

Thanks to an intensive lobbying effort and consensus building by the San Diego County Water Authority’s first chairman, Fred Heilbron, the San Vicente Aqueduct’s second pipeline was constructed between 1951 and 1954.

The effort paid off when the second pipeline, parallel to and the same size as the first, began delivering water to the San Diego region. But even the doubling of capacity was insufficient to supply the growing population. The Water Authority had grown to 18 member agencies, and was four times the service area it had when it was originally formed ten years earlier in 1944.

Planning immediately began for a third pipeline, Pipeline 3.

OPINION: Newsom Most Likely To Stand Up For Our Region In Water Fight

/in , /by /The Modesto Bee

California’s governor is important not just here, but across the nation and even around the world, so it matters whom we choose to lead our great state. At the risk of sounding irredeemably self-centered, it matters even more here in the Northern San Joaquin Valley. That’s because our region of 1 million is under attack by the State Water Resources Control Board. The next governor must not only understand our battle, but be willing to rein in an out-of-control state agency or at least alter the conversation.

Full Story

OPINION: Deconstructing The Opposition To The California Water Fix

/in , /by /Fox and Hounds

Here we go again.  There’s nothing better than California water politics to prove the sagacity of French writer Alphonse Karr’s immortal quip: “plus ça change, plus c’est la même chose” (“The more things change, the more it’s the same thing.”) Last week the Metropolitan Water District (MWD) Board voted for a second time to finance the Delta tunnels, aka the California WaterFix.  (Applying an abundance of caution, the Board decided to re-vote to preclude the impacts of a number of unsubstantiated allegations from WaterFix opponents such as purported Brown Act violations and other sundry sins, crimes and misdemeanors).

Full Story

OPINION: Why A Regional Power Grid Brings Energy Security

/in , /by /The San Diego Union-Tribuneby Allan Zaremberg

Reliable energy infrastructure is a hallmark of a modern world, and affordable power is vital for economic development and social cohesion. Ensuring that electricity is both affordable and reliable are ultimately the responsibility of our state government leaders when they set the ground rules for how electricity is generated and how it is transmitted around the grid.

Full Story

OPINION: Why Energy Policy Must Include Environmental Justice

/in , /by /The San Diego Union-Tribuneby Carolina Martinez and Diana Vazquez

In 2010, San Diegans won a huge victory in decommissioning the South Bay Power Plant. The natural-gas fired plant raised concerns about poor air quality and asthma in the surrounding Latino/a community of Chula Vista for too long. It occupied precious San Diego Bayfront land, and perpetuated our state’s dependence on fossil fuels at a time when we needed to turn towards renewable energy.

Full Story

Orange County Officials Give Early Approval To Huntington Beach Desalination Plant Contract

/in , /by /The Orange County Registerby Martin Wisckol

Concerns over the cost and environmental impacts of desalinated water were overridden by the desire to fortify water supplies when the Orange County Water District board voted 6-2 Wednesday to approve non-binding contract terms with Poseidon, which has spent 20 years on the desalination plant proposal for Huntington Beach. The plan for the $1 billion plant and water distribution infrastructure would increase the monthly bill for the average residential customer receiving the water by an estimated $3 to $6. It would help ensure the area has water during droughts when supplies from Northern California and the Colorado River are curtailed.

Full Story

LA County Voters To Decide On New Stormwater Tax In November

/in , /by /89.3 KPCC (Pasadena)by Sharon McNary

The Los Angeles County Board of Supervisors voted 4-1 Tuesday to place the measure on the Nov. 6 ballot. If two-thirds of voters in the Los Angeles County Flood Control District agree, property owners would be charged a new tax of 2.5 cents for every square foot of land shedding water. That includes roofs, patios, driveways and other hard surfaces.

Full Story

Fresno, Clovis Plan To Mix Recycled Sewer Water For Drinking

/in , /by /Valley Public Radio (Clovis)by Marc Benjamin

If you’ve been to Disneyland, Cambria, many parts of Los Angeles, then you most likely had a swig of highly treated recycled water. Recycled water meaning, yes, it was once in a sewage treatment plant. For many years this recycled water has helped Orange County meet the needs of its growing population and reduce the toll on its declining aquifers. Soon, the same kind of water may be coming to Clovis and Fresno’s drinking water.

Full Story