Conjunctive use is a catchphrase for coordinated use of surface water and groundwater— literally going with the flow to maximize sufficient yield.
California does not have a statewide groundwater management system, and groundwater and surface water have been traditionally treated as separate resources. Now, with water demand frequently outpacing supply, water leaders are often coordinating the use of both. More long-term, California water managers are now including conjunctive use as part of their strategies for future water management. Conjunctive use centers on flexibility, and its application includes both active and passive forms.
As more people build homes in fire-prone areas, and as climate change and other factors increase the frequency of fires, there is a growing risk to life and property throughout the West — and a lesser known risk to the region’s already endangered water supply. At least 65 percent of the public water supply in the Western U.S. comes from fire-prone areas.
The announcement finalizes prioritization of 458 basins, identifying 56 that are required to create groundwater sustainability plans under the Sustainable Groundwater Management Act. For most basins, the results are a confirmation of prioritizations established in 2015. Fifty-nine basins remain under review with final prioritization expected in late spring.
At the Groundwater Resources Association’s Western Groundwater Congress, a panel of experts discussed emerging issues as agencies work to develop their plans to comply with the Sustainable Groundwater Management Act, which became law in California in 2014.
There’s every reason to expect that 2019 will be far better, largely because of Measure W, which was passed by voters in November. The initiative imposes a Los Angeles County parcel tax that will generate $300 million per year to reduce pollution from runoff and capture storm water to add to the water supply.
In the universe of California water, Tim Quinn is a professor emeritus. Quinn has seen — and been a key player in — a lot of major California water issues since he began his water career 40 years ago as a young economist with the Rand Corporation, then later as deputy general manager with the Metropolitan Water District of Southern California, and finally as executive director of the Association of California Water Agencies. In December, the 66-year-old will retire from ACWA.
The California Water Commission announced Friday that the Sites Reservoir project was eligible for $1 billion in Proposition 1 funds, up from $933 million the commission had said it might receive last month. … The commission also signaled more support for a small groundwater storage proposed by the Sacramento Regional County Sanitation District.
This 24-page booklet traces the development of the landmark Water Forum Agreement, signed in April 2000 by 40 Sacramento region water purveyors, public officials, community group leaders, environmentalists and business representatives. The publication also offers insight on lessons learned by Water Forum participants.
Although some water districts have coordinated use of surface water and groundwater for years ,conjunctive use has become the catchphrase when it comes to developing additional water supply for the 21st century. This article focuses on conjunctive use. It includes background information explaining how conjunctive use works, discusses the potential storage capacity, provides an overview of the hurdles that must be overcome to develop a successful project, and profiles several projects.
This issue of Western Water examines the continuing practice of smart water use in the urban sector and its many facets, from improved consumer appliances to improved agency planning to the improvements in water recycling and desalination. Many in the water community say conserving water is not merely a response to drought conditions, but a permanent ethic in an era in which every drop of water is a valuable commodity not to be wasted.
Statewide, groundwater provides about 30 percent of California’s water supply, with some regions more dependent on it than others. In drier years, groundwater provides a higher percentage of the water supply. Groundwater is less known than surface water but no less important. Its potential for helping to meet the state’s growing water demand has spurred greater attention toward gaining a better understanding of its overall value. This issue of Western Water examines groundwater storage and its increasing importance in California’s future water policy.
This printed issue of Western Water features a roundtable discussion with Anthony Saracino, a water resources consultant; Martha Davis, executive manager of policy development with the Inland Empire Utilities Agency and senior policy advisor to the Delta Stewardship Council; Stuart Leavenworth, editorial page editor of The Sacramento Bee and Ellen Hanak, co-director of research and senior fellow at the Public Policy Institute of California.
This printed issue of Western Water looks at California groundwater and whether its sustainability can be assured by local, regional and state management. For more background information on groundwater please refer to the Foundation’s Layperson’s Guide to Groundwater.
This 25-minute documentary-style DVD, developed in partnership with the California Department of Water Resources, provides an excellent overview of climate change and how it is already affecting California. The DVD also explains what scientists anticipate in the future related to sea level rise and precipitation/runoff changes and explores the efforts that are underway to plan and adapt to climate.
Many Californians don’t realize that when they turn on the faucet, the water that flows out could come from a source close to home or one hundreds of miles away. Most people take their water for granted; not thinking about the elaborate systems and testing that go into delivering clean, plentiful water to households throughout the state. Where drinking water comes from, how it’s treated, and what people can do to protect its quality are highlighted in this 2007 PBS documentary narrated by actress Wendie Malick.
A 30-minute version of the 2007 PBS documentary Drinking Water: Quenching the Public Thirst. This DVD is ideal for showing at community forums and speaking engagements to help the public understand the complex issues surrounding the elaborate systems and testing that go into delivering clean, plentiful water to households throughout the state.
This 7-minute DVD is designed to teach children in grades 5-12 about where storm water goes – and why it is so important to clean up trash, use pesticides and fertilizers wisely, and prevent other chemicals from going down the storm drain. The video’s teenage actors explain the water cycle and the difference between sewer drains and storm drains, how storm drain water is not treated prior to running into a river or other waterway. The teens also offer a list of BMPs – best management practices that homeowners can do to prevent storm water pollution.
This 11-minute video simplifies the often-misunderstood concept of conjunctive use – coordinating surface water and groundwater supplies, which are often managed as separate resources. It explains in an easy-to-understand manner the relationship between groundwater and surface water, outlines different forms of conjunctive use, and identifies issues of concern that must be resolved for each project. Includes extensive computer graphics that illustrate these concepts.
The 28-page Layperson’s Guide to Groundwater is an in-depth, easy-to-understand publication that provides background and perspective on groundwater. The guide explains what groundwater is – not an underground network of rivers and lakes! – and the history of its use in California.
The 24-page Layperson’s Guide to Integrated Regional Water Management (IRWM) is an in-depth, easy-to-understand publication that provides background information on the principles of IRWM, its funding history and how it differs from the traditional water management approach.
The 20-page Layperson’s Guide to Water Marketing provides background information on water rights, types of transfers and critical policy issues surrounding this topic. First published in 1996, the 2000 version offers expanded information on groundwater banking and conjunctive use … Colorado River transfers, CALFED’s Water Transfer Program and the role of private companies in California’s developing water market.
Order in bulk (25 or more copies of the same guide) for a reduced fee. Contact the Foundation, 916-444-6240, for details.
The 28-page Layperson’s Guide to Water Rights Law, recognized as the most thorough explanation of California water rights law available to non-lawyers, traces the authority for water flowing in a stream or reservoir, from a faucet or into an irrigation ditch through the complex web of California water rights.