The What, Why, and How of Groundwater Modeling

Abishek Singh, Ph.D., is Vice President of Intera’s Western Region based out of Los Angeles.  His professional experience has focused on research and application experience in groundwater and surface water modeling, planning and decision analysis, risk and uncertainty analyses, optimization techniques, and temporal/spatial statistics. He has expertise in developing, calibrating, and applying hydrologic and data-driven models to support robust water-resources decision-making.

In a recent webinar presented by Intera, Dr. Singh gave a presentation explaining what groundwater models are, uses for groundwater models, how groundwater models work, and provided some case studies.

Click here to read this article at Maven ‘s Notebook.

SGMA IN ACTION: Challenges and opportunities, Environmental justice considerations, and first lawsuits over GSP plans

Critically overdrafted groundwater basins submitted their Groundwater Sustainability Plans (GSPs) in January 2020, and high and medium priority subbasins will be submitting their GSPs in 2022. At the Environmental Law Conference at Yosemite, a panel provided an update on Sustainable Groundwater Management Act implementation, including issues being litigated in first impression lawsuits across the state. Best practices for groundwater allocation and trading, and incorporation of environmental justice concerns into GSPs.  How agencies address CEQA compliance for GSA Project and Management Actions were also discussed.

The panelists:

Eric Averett, general manager of Roseville-Rio Bravo Water Storage District: Since 1991, Eric has been actively involved in evaluating and resolving water supply and quality challenges facing Kern County. Eric Averett serves as president of the Kern River Watershed Coalition. He sits on the board of directors for the Water Association of Kern County and the Association of California Water Agencies.

Camille Pannu, a visiting clinical law professor at the Community and Economic Development Clinic at UC Irvine School of Law: Prior to joining UC Irvine, she served as the inaugural director for the Water Justice Clinic at UC Davis School of Law, the first clinic of its kind in the country. Her practice uses administrative advocacy, strategic research, and transactional legal tools to address the impact of racial and economic inequality on access to clean, safe drinking water in California’s low-income communities.

Tom Lippe, public interest environmental law attorney:  He has been actively involved since 1987 in cases dealing with land use, CEQA, NEPA, surface water, groundwater, coastal protection, and endangered species. Mr. Lippe’s practice has included many cases involving the effects of land-use changes on groundwater resources and the effects of groundwater consumption on streamflow and endangered salmonids. Mr. Lippe is currently litigating two cases challenging groundwater sustainability plans adopted under the Sustainable Groundwater Management Act for the Eastern San Joaquin and Delta-Mendota groundwater basins.

The panel was moderated by Natalie Stork, chief of the Groundwater Management Program at the State Water Resources Control Board, which is responsible for the board’s implementation of SGMA.

Click here to read this article at Maven’s Notebook.

CA WATER COMMISSION: Merced River Watershed Flood MAR Study

Kamyar Guivetchi, Manager of DWR’s Division of Planning has often referred to Flood Managed Aquifer Recharge (or Flood MAR) as a “moon shot” for recharging depleted groundwater basins, but just how much Flood MAR can contribute to groundwater recharge in a watershed is unknown.  However, the Department of Water Resources’ Integrated Watershed Management staff is underway with a pilot study to look at the potential for Flood MAR in the Merced River watershed.

At the October meeting of the California Water Commission, Mr. Guivetchi and David Arrate, Senior Water Resources Engineer with the Department of Water Resources, gave a presentation on the study and shared some of the preliminary results.

Click here to read this article from Maven’s Notebook.

Developing groundwater allocations: Findings and recommendations

From Maven’s Notebook:

As groundwater sustainability agencies prepare their plans to meet the requirements of the Sustainable Groundwater Management Act (SGMA), they will likely utilize a variety of tools to achieve sustainability.  In many subbasins, groundwater overdraft conditions will require GSAs to impose reductions in pumping in order to achieve sustainable conditions in the subbasin. To do this, GSAs will need set a limit or “cap” on the overall amount of groundwater that is removed from the subbasin, assigning portions of this capped amount to groundwater pumpers in the form of a pumping allocation.

Making pumping allocation decisions will be a difficult task for GSAs, as it will require restricting access to groundwater resources upon which the agricultural community, cities and towns, and others depend.  Adding further complexity to the task, SGMA explicitly states that it does not alter water rights, which means groundwater sustainability agencies have to carefully navigate between the confines of water rights and SGMA requirements in developing and implementing their groundwater sustainability plans.

At the 3rd annual Western Groundwater Congress, hosted online by the Groundwater Resources Association of California in September of 2020, Dr. William Blomquist, a Professor of Political Science and more at Indiana University-Purdue University Indianapolis, gave a presentation of ongoing research he is doing with Dr. Christina Babbitt, California Groundwater Manager at the Environmental Defense Fund looking at how other groundwater basins have developed groundwater allocations.

Click here to read this article.

Successful Integration: How SGMA and IRWM Can Utilize Each Other’s Strengths

Guest commentary from Soua Lee, Program Manager of the Kings Basin Water Authority, on behalf of the IRWM Roundtable of Regions, posted at Maven’s Notebook:

How does a region integrate Sustainable Groundwater Management Act (SGMA), a program mandated by State legislation, with Integrated Regional Water Management (IRWM), a voluntary collaborative effort, to implement regional water management solutions?

A question often asked, but with no definitive answer depending on who you ask. This article discusses how IRWM and SGMA share a similar approach that involves comprehensive management on a regional scale and provides examples of where the two programs are working together successfully.

Click here to read this article.

WEBINAR: Successful collaboration between IRWM and SGMA

This webinar discusses the benefits of successful collaboration between groundwater sustainability agencies implementing the Sustainable Groundwater Management Act (SGMA) and Integrated Regional Water Management (IRWM) planning efforts.

The speakers were:

  • David Orth, Principal, New Current Water and Land
  • Rob Swartz, Manager of Tech Services, Regional Water Authority and American River IRWM
  • Angela Islas, Community Development Specialist, Self-Help Enterprises

The panel was moderated by Lance Eckhart, General Manager of the San Gorgonio Pass Water Agency.

GSA SUMMIT: Addressing environment, disadvantaged communities, and domestic wells in the 2022 Groundwater Sustainability Plans

The groundwater sustainability plans that were submitted to the Department of Water Resources in January of 2020 were the first of the groundwater sustainability plans to be completed.  Public review of these plans has revealed some important lessons to be learned to be considered for those preparing the plans that will be due in January of 2022.  At the 3rd Annual Groundwater Sustainability Agency Summit hosted by the Groundwater Resources Association online in June, a panel of NGOs that had completed a review of the plans summarized their findings from the perspective of underrepresented beneficial users and with respect to stakeholder engagement, providing insights and recommendations for the upcoming plans.

Click here to read this article at Maven’s Notebook.

GSA SUMMIT: Setting Sustainable Management Criteria: It’s easy, isn’t it?

The details of how a groundwater sustainability plan will be implemented are defined by the setting of sustainable management criteria (or SMC). With several undesirable results to consider, a range of technical analyses to perform, data gaps yet to be filled, and potentially conflicting stakeholder interests, the process to establish sustainable management criteria is often involved and challenging.

At the Groundwater Resources Association’s 3rd annual GSA Summit, a panel reviewed how the process went for the groundwater sustainability plans that were submitted to the Department of Water Resources earlier this year, focusing on four of the six sustainable management criteria: water levels, water quality, land subsidence, and interconnected surface waters.

Click here to read this article at Maven’s Notebook.

GSA SUMMIT: Lessons learned from the 2020 GSPs: Perspectives from the critically overdrafted basins

The implementation phase of the Sustainable Groundwater Management Act has now begun for the basins designated as critically-overdrafted. Getting to this point has been an unparalleled journey as communities, farmers, water suppliers, and others navigated through uncharted territory to develop local solutions for sustainable groundwater management. At the Groundwater Resources Association Third Annual Groundwater Sustainability Agency Summit held online in June, a panel of managers from four of the critically overdrafted basins reflected on the hard work of developing and adopting a groundwater sustainability plan.

Seated on the panel were Gary Petersen from the Salinas Valley Basin GSA; Eric Osterling from the Mid Kaweah GSA; Deanna Jackson from TriCounty GSA; and Patricia Poire from the Kern Groundwater Authority.  Collectively, these GSAs are having to deal with all six of the undesirable results, from subsidence to groundwater levels to seawater intrusion, and they overly five of the 21 critically overdrafted basins.

Each panelist then discussed the process that they went through in developing their plans, the lessons they learned, and their advice for those developing the plans that will be due in January of 2022.

Click here to read this article.

GSA SUMMIT: Reflections on the 2020 GSP process

At the end of January of this year, the state’s critically overdrafted groundwater basins submitted their adopted groundwater sustainability plans (or GSPs), meeting an important deadline in the Sustainable Groundwater Management Act; the remaining basins subject to SGMA will be submitting their plans in January of 2022.  The Department of Water Resources will now have two years to review the plans to determine their adequacy.

At the Third Annual GSA Summit, Craig Altare, chief of the Groundwater Sustainability Plan section at the Department of Water Resources’ Sustainable Groundwater Management Office or SGMO, reflected on the GSPs and how the implementation of SGMA is playing out.

Click here to read this article at Maven’s Notebook.

 

 

GROUNDWATER 101: The basics

Dr. Thomas Harter provides a basic understanding of groundwater – what it is, how much groundwater is out there, how fast groundwater moves, and where it comes from and where it goes

Groundwater is an important part of California’s – and the nation’s water supply.   Nationwide, groundwater makes up on average 26% of the water supply.  In California, that number is significantly higher – groundwater provides nearly 40% of the water used by California’s farms and cities, and significantly more in dry years.  But what is groundwater?  In this post based on the first segment of the UC Davis shortcourse on groundwater, Dr. Thomas Harter, who is the Robert M. Hagan Endowed Chair for Water Resources Management and Policy at the University of California, Davis as well as Professor and Cooperative Extension Specialist in the Department of Land, Air, and Water Resources (among many other things), provides a basic understanding of groundwater – what it is, how much groundwater is out there, how fast groundwater moves, and where it comes from and where it goes.

Click here to read this article.