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Banner May 22, 2014

Your Online Water Encyclopedia

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Overview February 3, 2014

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Aquapedia background February 3, 2014

David A. Gaines

David A. Gaines (1947-1988) is known for founding the Mono Lake Committee in 1978 with the goal of preserving its ecosystem and leading a grassroots effort to “Save Mono Lake.” The result would be an environmental cause célèbre. As a synopsis of the Mono Lake litigation, in 1979 a lawsuit was filed against the Los Angeles Department of Water and Power (DWP) to stop diversions to Southern California — citing the public trust values at Mono Lake.

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  • Mono Lake Committee
Aquapedia background February 11, 2014 Interested in applying for the next California or Colorado River Water Leader cohorts? IN MEMORIAM: William R. Gianelli

William R. “Bill” Gianelli

William R. “Bill” Gianelli (1919-2020) was a civil engineer who served not only as director of the California Department of Water Resources (DWR) from 1967-1973 during Gov. Ronald Reagan’s administration, but worked as a civil servant under Govs. Earl Warren, Goodwin Knight and Edmund G. “Pat” Brown during all phases of the California State Water Project (SWP): its design, planning and construction.

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Aquapedia background February 11, 2014

Thomas J. “Tom” Graff

Thomas J. “Tom” Graff (1944-2009) opened up the California office of the Environmental Defense Fund in 1971 and was its regional director for more than 35 years.

Throughout his life, he was committed to the environment and the mentorship of environmental leaders. He was revered as an influential environmental lawyer on the state and federal water circuits and public forums and used strategic acumen to build partnerships to solve water problems with long-lasting solutions.

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Grey Water set up
Aquapedia background February 3, 2014 Layperson's Guide to California Water

Grey Water

Grey water, also spelled as gray water, is water that already has been used domestically, commercially and industrially. This includes the leftover, untreated water generated from washing machines, bathtubs and bathroom sinks.

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Groundwater pump in a Northern California farm field.
Aquapedia background February 3, 2014 California Groundwater Map Layperson's Guide to Groundwater

Groundwater

If California were flat, its groundwater would be enough to flood the entire state 8 feet deep. The enormous cache of underground water helped the state become the nation’s top agricultural producer. Groundwater also provides a critical hedge against drought to sustain California’s overall water supply.

In years of average precipitation, about 40 percent of the state’s water supply comes from underground. During a drought, the amount can approach 60 percent.

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Aquapedia background February 3, 2014

Groundwater Adjudication

When multiple parties withdraw water from the same aquifer, groundwater pumpers can ask the court to adjudicate, or hear arguments for and against, to better define the rights that various entities have to use groundwater resources. This is known as  groundwater adjudication. [See also California water rights and Groundwater Law.]

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An aerial view of a groundwater bank
Aquapedia background February 3, 2014

Groundwater Banking

Groundwater banking is a process of diverting floodwaters or other surface water into an aquifer where it can be stored until it is needed later. In a twist of fate, the space made available by emptying some aquifers opened the door for the banking activities used so extensively today.

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Aquapedia background August 15, 2016

Groundwater Basin

Aquifer or system of aquifers that has reasonably well-defined boundaries.

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Aquapedia background February 4, 2014

Groundwater Law

California, like most arid Western states, has a complex system of surface water rights that accounts for nearly all of the water in rivers and streams.

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Aquapedia background February 4, 2014

Groundwater Legislation

California has considered, but not implemented, a comprehensive groundwater strategy many times over the last century.

One hundred years ago, the California Conservation Commission considered adding  groundwater regulation into the Water Commission Act of 1913.  After hearings were held, it was decided to leave groundwater rights out of the Water Code.

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Aquapedia background February 4, 2014 California Groundwater Map Layperson's Guide to Groundwater Sustainable Groundwater Management Act (SGMA)

Groundwater Management

Groundwater pump in California's Central ValleyGroundwater management is recognized as critical to supporting the long-term viability of California’s aquifers and protecting the nearby surface waters that are connected to groundwater.

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barrel half-buried in the ground, posing a threat to groundwater.
Aquapedia background February 11, 2014 California Groundwater Map Layperson's Guide to Groundwater

Groundwater Pollutants

The natural quality of groundwater in California depends on the surrounding geology and on the source of water that recharges the aquifer.

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Aquapedia background July 20, 2017 California Groundwater Map Layperson's Guide to Groundwater

Groundwater Replenishment

Groundwater replenishment happens through direct recharge and in-lieu recharge. Water used for direct recharge most often comes from flood flows, water conservation, recycled water, desalination and water transfers.

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Aquapedia background February 4, 2014

Groundwater Treatment

The treatment of groundwater— the primary source of drinking water and irrigation water in many parts of the United States — varies from community to community, and even from well to well within a city depending on what contaminants the water contains.

In California, one-half of the state’s population drinks water drawn from underground sources [the remainder is provided by surface water].

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