Center for Biological Diversity vs. Lincoln County Water District

Nevada Appellate Courts | January 25th, 2024

This case examines whether the State Engineer has the authority to redesignate multiple existing hydrographic basins as one "superbasin" based on a shared source of water

This case examines whether the State Engineer has the authority to redesignate multiple existing hydrographic basins as one "superbasin" based on a shared source of water for purposes of the water's administration and management. We also look at whether the State Engineer complied with due process in creating the superbasin at issue here.

Central and West Basin Water Replenishment District, etc. v. Charles E. Adams, et al

Superior Court of California, County of Los Angeles | December 23rd, 2013

Note from “An Evaluation of California’s Adjudicated Groundwater Basins” by Langridge et al: "Third Amendment Judgment to the Central Basin adjudication ... allo

Note from “An Evaluation of California’s Adjudicated Groundwater Basins” by Langridge et al: "Third Amendment Judgment to the Central Basin adjudication ... allowed parties holding water rights to store water in the Central Basin for later recovery; DWR was replaced with a new Watermaster consisting of three separate arms with different functions: Administrative Body, Water Rights Panel, and a Storage Panel."

Central Kings Groundwater Sustainability Agency Groundwater Sustainability Plan

Central Kings Groundwater Sustainability Agency (CKGSA) | December 11th, 2019

Central Kings Groundwater Sustainability Agency Groundwater Sustainability Plan (Revised)

Central Kings Groundwater Sustainability Agency (CKGSA) | July 13th, 2022

Characterization of Groundwater Recharge and Flow in California's San Joaquin Valley From InSAR-Observed Surface Deformation

American Geophysical Union (AGU) | March 4th, 2021

Surface deformation in California's Central Valley (CV) has long been linked to changes in groundwater storage. Recent advances in remote sensing have enabled the mappin

Surface deformation in California's Central Valley (CV) has long been linked to changes in groundwater storage. Recent advances in remote sensing have enabled the mapping of CV deformation and associated changes in groundwater resources at increasingly higher spatiotemporal resolution. Here, we use interferometric synthetic aperture radar (InSAR) from the Sentinel-1 missions, augmented by continuous Global Positioning System (cGPS) positioning, to characterize the surface deformation of the San Joaquin Valley (SJV, southern two-thirds of the CV) for consecutive dry (2016) and wet (2017) water years. We separate trends and seasonal oscillations in deformation time series and interpret them in the context of surface and groundwater hydrology. We find that subsidence rates in 2016 (mean −42.0 mm/yr; peak −345 mm/yr) are twice that in 2017 (mean −20.4 mm/yr; peak −177 mm/yr), consistent with increased groundwater pumping in 2016 to offset the loss of surface-water deliveries. Locations of greatest subsidence migrated outwards from the valley axis in the wetter 2017 water year, possibly reflecting a surplus of surface-water supplies in the lowest portions of the SJV. Patterns in the amplitude of seasonal deformation and the timing of peak seasonal uplift reveal entry points and potential pathways for groundwater recharge into the SJV and subsequent groundwater flow within the aquifer. This study provides novel insight into the SJV aquifer system that can be used to constrain groundwater flow and subsidence models, which has relevance to groundwater management in the context of California's 2014 Sustainable Groundwater Management Act (SGMA).

Chino Basin Municipal Water District v. City of Chino et al

Superior Court of California, County of San Bernardino | August 25th, 2014

From "An Evaluation of California's Adjudicated Groundwater Basins" by Langridge et al: "Chino Basin is one of the largest groundwater basins in Southern California. It a

From "An Evaluation of California's Adjudicated Groundwater Basins" by Langridge et al: "Chino Basin is one of the largest groundwater basins in Southern California. It abuts Los Angeles County, Orange County, and Riverside County. Over the past few decades, the basin has experienced rapid growth. The southern area was once notable for containing the heaviest concentration of dairy farms in the United States. There is significant subsidence in areas of the basin due to overpumping. While it is often described as a basin with ongoing conflict, there were also significant collaborative efforts to address basin problems during and after the adjudication process. Three different stakeholder groups—overlying agricultural, overlying non-agricultural, and appropriators—negotiated a management plan prior to adjudication, and it was adopted in a 1978 stipulated judgment. Stakeholders agreed on water rights for each group of users. There were multiple additional amendments over the last twenty years adopted in a 2012 restated judgment." Click here for the Chino basin Department of Water Resources Adjudicated Basin Reporting page.

Chowchilla Subbasin Sustainable Groundwater Management Act (SGMA) Groundwater Sustainablity Plan

Chowchilla Subbasin GSP Advisory Committee | January 1st, 2020

City of Barstow, et al v. City of Adelanto, el al (Mojave Basin Area cases)

Superior Court of California, County of Riverside | December 5th, 2002

From An Evaluation of California’s Adjudicated Groundwater Basins, Langridge et al, UC Davis (2016): "The Mojave Basin adjudication was initiated by a lawsuit filed

From An Evaluation of California’s Adjudicated Groundwater Basins, Langridge et al, UC Davis (2016): "The Mojave Basin adjudication was initiated by a lawsuit filed May 30, 1990, by the City of Barstow and the Southern California Water Company. The complaint alleged that the cumulative increase in water use in the upper part of the Mojave Basin caused or threatened to cause a reduction in the natural flow of water to the central part of the Mojave Basin. Water users included downstream agriculture (many alfalfa farms), aquaculture, recreational lakes, homeowner associations, and upstream burgeoning municipalities. In the center of the basin is the smaller, low-income town of Barstow, which was concerned about its water supply. A 1993 Stipulated Judgment set forth a proposed physical solution that did not apportion production rights on the basis of preexisting legal water rights, and parties representing over 80 percent of verified water production in the basin agreed to its terms. However, some farmers with overlying rights chose not to stipulate to the judgment. On appeal, the court stated that in considering a stipulated physical solution involving equitable apportionment, the water rights of parties that did not join the stipulation must also be considered. The adjudication set out a complex system to reduce production a producer’s free production allowance (FPA) over time, but withdrawals remain significant in three out of the five subareas. The judgment also contained unique provisions for assuring that the water needs of endangered and other species and their habitat would be protected. One outcome of the adjudication was that many farmers in the western Alto Subarea sold or leased their base annual production (BAP) rights or leased their FPA to municipalities, and population in the Alto Subarea almost doubled. The Barstow Marine Corps Logistics Base east of Barstow is a federal Superfund site."

City of San Bernardino vs. Fontana Water Co. et al.

Superior Court of California, County of San Bernardino | January 28th, 1924

Critical Aquifer Overdraft Accelerates Degradation of Groundwater Quality in California's Central Valley During Drought

American Geophysical Union (AGU) | September 1st, 2021

It has been established that wells are at risk to run dry when groundwater levels decline during drought, but associated impacts to water quality are poorly understood. 

It has been established that wells are at risk to run dry when groundwater levels decline during drought, but associated impacts to water quality are poorly understood. This study examined 30 yr of data from California's Central Valley to find dramatic groundwater-level declines during drought were associated with worsening groundwater quality. This likely happens because increased pumping during drought can draw shallow, contaminated groundwater to depths commonly tapped by public drinking water wells. This is the first study of its kind to show direct linkages between drought and groundwater quality at such a broad spatial scale