Examples of Managed Flow Regimes – Possible Models for the Delta?

Maven's Notebook – Dr. Clifford Dahm began by noting that his presentation will present possible models for the Delta, drawing on some of the work he’s done over the last 15 years relating to the issue of flows and setting flow criteria in systems that have a high degree of human impact and human management. Dr. Dahm gave five short vignettes to spotlight the work being done to set flow Read More…

Clean Water Plan for Long-Suffering San Joaquin Valley Towns Derailed

News Deeply – Fresh Sierra mountain snowmelt would make a better drink of water for rural Tulare County folk who currently rely on wells tainted by fertilizers, leaky septic systems and decades-old pesticide residues. Nobody argues with that here in California’s San Joaquin Valley. The problem is obtaining even a tiny fraction of the average 1.7 million acre-feet of Kings River Read More…

Panel Discussion: The science of natural functional flows to the Delta

Maven's Notebook – “Some would argue that more storage in the system would actually benefit native species and our ability to provide environmental flows,” began moderator Chris Enright. “It could be that would allow us to harvest wet year flows. So, additional storage allows us to do that. It allows us, perhaps, to have water for drier years. One thing we also know in this system Read More…

Making Sense of Impact Reports on California’s Delta Tunnels Project

News Deeply – On June 23, the United States Fish and Wildlife Service declared that California’s plan to build two massive underground tunnels to transport water from the Delta to Southern California, known as California WaterFix, would not adversely impact the Delta’s already threatened fish species, such as the Delta smelt and Chinook salmon. While the service’s announcement Read More…

California drought: Water district looking to buy land to construct…

The Mercury News – In a significant step toward construction of the Bay Area’s first major new reservoir in nearly two decades, Silicon Valley’s largest water provider has begun negotiations to buy more than 12,000 acres of rural ranch land — an area nearly half the size of San Francisco. The Santa Clara Valley Water District is hoping to build an $800 million reservoir in southern Read More…

Sea temperature changes contributing to droughts

Phys Org – Fluctuations in sea surface temperature are a factor in causing persistent droughts in North America and around the Mediterranean, new research suggests. A team from the universities of Exeter, Montpellier and Wageningen analysed data from 1957-2002 and found sea surface temperatures in the North Pacific and North Atlantic became increasingly variable, and extremes lasted for Read More…

What Do We Mean by “Natural Functional Delta Inflow” in a…

Maven's Notebook – “The issue here for the day is really what do we mean by natural functional flows,” began Chris Enright, Senior Water Resources Engineer for the Delta Science Program (now retired). “What’s a natural hydrograph in regulated rivers, and the science of natural functional inflows to the Delta? So right off the bat, we have a contradiction; natural and functional. Read More…

‘It’s going to be a fight’

The Stockton Record – Some call it political theater. Others call it a serious threat. Whatever the prognosticators say, the latest effort by south San Joaquin Valley Republicans to wring more water out of the Delta is undeniably ambitious. A bill that cleared the House of Representatives last week requires the Delta to be governed by 20-year-old water quality standards that scientists Read More…

These farmers say they may not pay for Delta tunnels pushed by Gov.…

The Sacramento Bee – The governor’s proposed Delta tunnels ran into a roomful of skeptics Monday – an influential group of San Joaquin Valley farmers who remain unconvinced the controversial project will deliver the water they need at a price they’re prepared to swallow. Three weeks after the tunnels received a crucial green light from federal environmental regulators, the $17.1 Read More…

California Is Poised for Big Gains in Recycled Water Use

News Deeply – The State's Recently released survey about California’s use of recycled water was disappointing for recycled water use advocates, but it doesn’t tell the full story. The survey, by the State Water Resources Control Board and Department of Water Resources, found that recycled water use has increased by 44,500 acre-feet since 2009. California used 713,653 acre-feet of Read More…