San Joaquin Valley Conveyance Study

California Department of Water Resources (DWR) | November 24th, 2025

This San Joaquin Valley Conveyance Study analyzes water conveyance needs in the San Joaquin Valley (Figure ES-1). The purpose of this study is to: •Describe the impa

This San Joaquin Valley Conveyance Study analyzes water conveyance needs in the San Joaquin Valley (Figure ES-1). The purpose of this study is to: •Describe the impacts of subsidence on San Joaquin Valley conveyance facilities. •Evaluate the need for improved or expanded conveyance facilities throughout the San Joaquin Valley.  

Satellite-based monitoring of groundwater depletion in California’s Central Valley

Nature Portfolio (Springer Nature) | November 5th, 2019

Range change data, obtained from Synthetic Aperture Radar satellites, form the basis for estimates of aquifer volume change in california’s central Valley. th

Range change data, obtained from Synthetic Aperture Radar satellites, form the basis for estimates of aquifer volume change in california’s central Valley. the estimation algorithm incorporates a function penalizing changes far from known well locations, linking the aquifer volume changes to agricultural, industrial, and municipal pumping within the tulare basin. We show that the range changes are compatible with the hypothesis that the source of aquifer volume changes are variations in effective pressure around documented wells. Specifically, inclusion of the well distance penalty does not degrade the fit to the observations, inversions with and without it both give variance reductions of 99.6%. The patterns of aquifer volume change vary significantly from the drought year, between October 2015 and October 2016, to a wet year in 2017, and into 2018, a year with near average rainfall. The 2.3 million acre-feet of estimated volume reduction, a lower bound on the amount of water extracted from the basin between October 2015 and 2016, agrees with independent estimates of 1.8 and 2.3 million acre- feet. The aquifer volume reduction is also compatible with a loss of 3.1 km3 (2.5 million acre-feet) in groundwater volume derived from Gravity Recovery and Climate Experiment (GRACE) satellite data.

Second Amended Delano-Earlimart Irrigation District Groundwater Sustainability Plan 2024

Delano-Earlimart Irrigation District Groundwater Sustainability Agency (DEID GSA) | July 1st, 2024

In January of 2020, the DEID GSA submitted its Groundwater Sustainability Plan (GSP) to the California Department of Water Resources (DWR). The GSP provided technical doc

In January of 2020, the DEID GSA submitted its Groundwater Sustainability Plan (GSP) to the California Department of Water Resources (DWR). The GSP provided technical documentation of the DEID Management Area’s existing sustainability, along with addressing the needs of the Earlimart Public Utility District and Richgrove Community Services District. The GSP outlined specific management actions that will be taken in accordance with the Sustainable Groundwater Management Act. DWR’s review of the Tule Subbasin, as a whole, resulted in an incomplete determination, to which the GSAs in the Tule Subbasin had 180 days to respond. The GSA’s in the Tule Subbasin provided revised GSPs on July 27, 2022, which DWR also determined were inadequate, causing the Tule Subbasin to transition to the oversight of the State Water Resources Control Board (SWRCB). The draft GSP found below includes updates to specifically address comments received from the SWRCB and their staff in anticipation of the Tule Subbasin probationary hearing on September 17, 2024. Comments on the 2nd amended GSP can be submitted to info@deid.org and will be accepted through August 18, 2024. Due to size, this file has been divided. Part 1, Part 2, Part 3, Part 4, Part 5, Part 6

Second Supplement to State Water Resources Board Bulletin No. 11, San Joaquin County Investigation, Basic Data, Calaveras Unit, 1955-56

California Department of Water Resources (DWR) | April 20th, 1957

Shasta Dam Fish Passage Evaluation – Pilot Implementation Plan – U.S. Bureau of Reclamation

U.S. Bureau of Reclamation (USBR) | September 1st, 2015

Short-lived pause in Central California subsidence after heavy winter precipitation of 2017

American Association for the Advancement of Science (AAAS) | August 29th, 2018

The Tulare Basin in Central California is a site of intensive agricultural activity and extraction of groundwater, with pronounced ground subsidence and degradation of wa

The Tulare Basin in Central California is a site of intensive agricultural activity and extraction of groundwater, with pronounced ground subsidence and degradation of water resources over the past century. Spatially extensive observations of ground displacements from satellite-based remote sensing allow us to infer the response of the aquifer system to changes in usage and to marked recharge events such as the heavy winter rainfall in 2017. Radar imagery from the Sentinel-1a/b satellites (November 2014 to October 2017) illuminates secular and seasonal trends modulated by changes in withdrawal rates and the magnitude of winter precipitation. Despite the increased precipitation in early 2017 that led to a marked decrease, or in some areas, reversal, of subsidence rates, subsidence returned to rates observed during the drought within a matter of months.

Short‐lived pause in Central California subsidence after heavy winter precipitation of 2017

American Association for the Advancement of Science (AAAS) | August 29th, 2018

The Tulare Basin in Central California is a site of intensive agricultural activity and extraction of groundwater, with pronounced ground subsidence and degrada

The Tulare Basin in Central California is a site of intensive agricultural activity and extraction of groundwater, with pronounced ground subsidence and degradation of water resources over the past century. Spatially extensive observations of ground displacements from satellite-based remote sensing allow us to infer the response of the aquifer system to changes in usage and to marked recharge events such as the heavy winter rainfall in 2017. Radar imagery from the Sentinel-1a/b satellites (November 2014 to October 2017) illuminates secular and seasonal trends modulated by changes in withdrawal rates and the magnitude of winter precipitation. Despite the increased precipitation in early 2017 that led to a marked decrease, or in some areas, reversal, of subsidence rates, subsidence returned to rates observed during the drought within a matter of months.

Simulations of Ground-Water Flow and Particle Pathline Analysis in the Zone of Contribution of a Public-Supply Well in Modesto, Eastern San Joaquin Valley, California

U.S. Geological Survey (USGS) | July 1st, 2008

So, You Want a Farm in Westlands Water District

University of California | August 2nd, 1976

Social Disparities in Nitrate-Contaminated Drinking Water in California’s San Joaquin Valley

National Institutes of Health (NIH) | September 1st, 2011