Central Valley Programs
See what USGS scientists are doing to better understand groundwater availability, land subsidence, and other issues related to the Central Valley's aquifer system.
See what USGS scientists are doing to better understand groundwater availability, land subsidence, and other issues related to the Central Valley's aquifer system.
Competition for water resources is growing throughout California, particularly in the Central Valley. Since 1980, the Central Valley's population has nearly doubled to 3.8 million people. Population growth, along with other factors, have created an intense demand for water. USGS Tools and information can be used to help manage the Central Valley aquifer system.
Water Use & Availability
Media
Sources/Usage: Public Domain. View Media Details
Central Valley Groundwater Availability
The depletion of groundwater at a variety of scales and the compounding effects of recent droughts have emphasized the need for an updated status on the availability of the Central Valley's groundwater resources.
Land Subsidence Studies
Land Subsidence in the San Joaquin Valley
Subsidence has been a major concern in the Central Valley since the 1950s. With agriculture and growing populations putting increased demands on the Valley's groundwater supply, subsidence must be monitored closely.
Delta-Mendota Canal: Evaluation of Groundwater Conditions & Land Subsidence
Increased groundwater pumping in the San Joaquin Valley has renewed aquifer compaction, resulting in land subsidence that is causing structural damage, and reduction in the freeboard and flow capacity of the Delta-Mendota Canal.
Related
Filter Total Items: 20
Groundwater-quality data in the Western Central Valley Domestic-Supply Aquifer Study Unit, 2023: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Western Central Valley Domestic-Supply Aquifer Study Unit, 2023: Results from the California GAMA Priority Basin Project
The U.S. Geological Survey collected groundwater samples from 44 wells used for domestic and small system drinking water supplies in the western Central Valley, California in 2023. The wells were sampled for the Western Central Valley domestic-supply aquifer study unit of the State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin...
MODFLOW-OWHM Used to Characterize the Groundwater Flow System of the Central Valley MODFLOW-OWHM Used to Characterize the Groundwater Flow System of the Central Valley
A three-dimensional groundwater flow model of the Central Valley in California was developed to aid water managers in understanding how water moves through the aquifer system, to predict water-supply scenarios, and to address issues related to subsidence. The USGS California Water Science Center made a detailed assessment of groundwater availability of the Central Valley aquifer system...
Relative distance of California's Central Valley from trough to valley edge and supporting data Relative distance of California's Central Valley from trough to valley edge and supporting data
California's Central Valley ranges from the mountain fronts toward a central trough, mainly defined by the San Joaquin and Sacramento Rivers, and the relative distance from trough to valley edges is of interest. This data release provides supplemental data for the USGS Professional Paper 1766, titled Groundwater Availability of the Central Valley Aquifer, California and provides...
Little Dry Creek and Cottonwood Creek Sediment Transport Data, 2012-2018, San Joaquin Watershed in the California Central Valley Little Dry Creek and Cottonwood Creek Sediment Transport Data, 2012-2018, San Joaquin Watershed in the California Central Valley
Two tributary watersheds¬ Cottonwood Creek and Little Dry Creek¬ to the greater San Joaquin watershed, in California’s Central Valley were assessed for sediment and flow dynamics, between water years (Oct. 1 to Sept. 30) 2011 and 2019. The two systems deliver suspended sediment to the San Joaquin River below Friant Dam, California. Because these two creeks are directly down river of...
Central Valley Hydrologic Model version 2 (CVHM2): Well Log Lithology Database and Texture Model Central Valley Hydrologic Model version 2 (CVHM2): Well Log Lithology Database and Texture Model
These data encompass the geologic framework model for the Central Valley Hydrologic Model Version 2 (CVHM2) study. This includes (1) the Well Log Database which contains borehole information and lithology used in creating the geologic framework, (2) Well Logs with Classification Information which explains how percent coarse values were determined for each borehole, and (3) the Three...
Central Valley Hydrologic Model version 2 (CVHM2): Observation Data (Groundwater Level, Streamflow, Subsidence) (ver. 2.2, May 2024) Central Valley Hydrologic Model version 2 (CVHM2): Observation Data (Groundwater Level, Streamflow, Subsidence) (ver. 2.2, May 2024)
This digital dataset includes three sets of observational data (groundwater level, streamflow, subsidence) used to calibrate the updated Central Valley Hydrologic Model (CVHM2). CVHM2 is a tool that can be used to quantify the sustainability of groundwater resources in the Central Valley.
Central Valley Hydrologic Model version 2 (CVHM2): Subsidence Package Central Valley Hydrologic Model version 2 (CVHM2): Subsidence Package
This digital dataset contains datasets used to develop the Subsidence Package in CVHM2. Data includes number of delay interbeds per model cell (Neq), equivalent thickness for a delay interbeds (Beq), and the zones used to define subsidence parameters. Beq and Neq are calculated from the database of well logs, which is provided in the parent dataset. Five zones are used to define...
Central Valley Hydrologic Model version 2 (CVHM2): Groundwater Pumping Central Valley Hydrologic Model version 2 (CVHM2): Groundwater Pumping
This digital dataset contains datasets used to develop the Multi Node Well (MNW2) Package in CVHM2. It includes well locations, well properties for Municipal Pumping, Rural Pumping, Recovery Pumping, and Agricultural Pumping. The data release also includes pumping rates for Municipal Pumping, Rural Pumping, Recovery Pumping. Agricultural Pumping are estimated in CVHM2 by the farm process...
Central Valley Hydrologic Model version 2 (CVHM2): Surface Water Network for Water Years 1922 - 2019 (ver. 2.1, June 2024) Central Valley Hydrologic Model version 2 (CVHM2): Surface Water Network for Water Years 1922 - 2019 (ver. 2.1, June 2024)
This digital dataset contains the monthly inflows and diversions to the surface-water network in the updated Central Valley Hydrologic Model (CVHM2) for water years 1922-2019. The surface-water network simulates the Central Valley’s complex conveyance network through the Streamflow Routing Package (SFR2) and the Farm-Process (FMP4) at 65 inflow locations with 271 stream segments and 13...
Central Valley Hydrologic Model version 2 (CVHM2): Model Setup Files Central Valley Hydrologic Model version 2 (CVHM2): Model Setup Files
The model setup of the updated Central Valley Hydrologic Model (CVHM2) is similar to the original Central Valley Hydrologic Model (CVHM). The differences in the model setup are described here as either model discretization, tidal influence, or drain flow. For model discretization, CVHM2 has 13 layers compared to 10 in CVHM. Tidal data for the San Francisco Bay and its influence on the...
Central Valley Hydrologic Model version 2 (CVHM2): Land Use Properties (ver. 3.0, October 2023) Central Valley Hydrologic Model version 2 (CVHM2): Land Use Properties (ver. 3.0, October 2023)
This digital dataset contains three types of information about the land use properties used in the updated Central Valley Hydrologic Model (CVHM2): land use shapefile showing primary land use type for a model cell through time, soil data using the curve number for each region and zone, and farm process parameter values including crop coefficients and rooting depths.
Central Valley Hydrologic Model version 2 (CVHM2): Climate Data (Precipitation, Evapotranspiration, Recharge, Runoff) from the Basin Characterization Model for water years 1922-2019 (ver. 2.0, June 2023) Central Valley Hydrologic Model version 2 (CVHM2): Climate Data (Precipitation, Evapotranspiration, Recharge, Runoff) from the Basin Characterization Model for water years 1922-2019 (ver. 2.0, June 2023)
This digital dataset consists of monthly climate data from the Basin Characterization Model v8 (BCMv8) for the updated Central Valley Hydrologic Model (CVHM2) for water years 1922 to 2019. The BCMv8 data are available in a separate data release titled "The Basin Characterization Model - A regional water balance software package (BCMv8) data release and model archive for hydrologic...
Central Valley Hydrologic Model version 2 (CVHM2): Decision support tool for groundwater and land subsidence management Central Valley Hydrologic Model version 2 (CVHM2): Decision support tool for groundwater and land subsidence management
The San Joaquin Valley (SJV) of California is one of the world’s most productive agricultural regions. Reliance on groundwater has led to some of the greatest rates of human-induced land subsidence in the world in the 20th century, as well as more recently. The United States Geological Survey (USGS) has recently developed an integrated surface–subsurface hydrologic model, the Central...
Authors
Kirk Nelson, Nigel Quinn, Jonathan Traum
Groundwater sustainability and land subsidence in California’s Central Valley Groundwater sustainability and land subsidence in California’s Central Valley
The Central Valley of California is one of the most prolific agricultural regions in the world. Agriculture is reliant on the conjunctive use of surface-water and groundwater. The lack of available surface-water and land-use changes have led to pumping-induced groundwater-level and storage declines, land subsidence, changes to streamflow and the environment, and the degradation of water...
Authors
Claudia C. Faunt, Jonathan Traum, Scott Boyce, Whitney Seymour, Elizabeth Jachens, Justin Brandt, Michelle Sneed, Sandra Bond, Marina Marcelli
Water availability and land subsidence in the Central Valley, California, USA Water availability and land subsidence in the Central Valley, California, USA
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially, agriculture relies heavily on local groundwater. In the...
Authors
Claudia C. Faunt, Michelle Sneed, Jonathan Traum, Justin Brandt
Water availability and subsidence in California's Central Valley Water availability and subsidence in California's Central Valley
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially, agriculture relies heavily on local groundwater. In the...
Authors
Claudia Faunt, Michelle Sneed, Jonathan Traum, Justin Brandt
Land subsidence along the Delta-Mendota Canal in the northern part of the San Joaquin Valley, California, 2003-10 Land subsidence along the Delta-Mendota Canal in the northern part of the San Joaquin Valley, California, 2003-10
Extensive groundwater withdrawal from the unconsolidated deposits in the San Joaquin Valley caused widespread aquifer-system compaction and resultant land subsidence from 1926 to 1970—locally exceeding 8.5 meters. The importation of surface water beginning in the early 1950s through the Delta-Mendota Canal and in the early 1970s through the California Aqueduct resulted in decreased...
Authors
Michelle Sneed, Justin Brandt, Mike Solt
California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley
Competition for water resources is growing throughout California, particularly in the Central Valley. Since 1980, the Central Valley's population has nearly doubled to 3.8 million people. It is expected to increase to 6 million by 2020. Statewide population growth, anticipated reductions in Colorado River water deliveries, drought, and the ecological crisis in the Sacramento-San Joaquin...
Authors
Claudia C. Faunt, Randall Hanson, Kenneth Belitz, Laurel Rogers
Groundwater availability of the Central Valley Aquifer, California Groundwater availability of the Central Valley Aquifer, California
California's Central Valley covers about 20,000 square miles and is one of the most productive agricultural regions in the world. More than 250 different crops are grown in the Central Valley with an estimated value of $17 billion per year. This irrigated agriculture relies heavily on surface-water diversions and groundwater pumpage. Approximately one-sixth of the Nation's irrigated land...
MODFLOW-2000 ground-water model-user guide to the Subsidence and Aquifer-System Compaction (SUB) Package MODFLOW-2000 ground-water model-user guide to the Subsidence and Aquifer-System Compaction (SUB) Package
This report documents a computer program, the Subsidence and Aquifer-System Compaction (SUB) Package, to simulate aquifer-system compaction and land subsidence using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. The SUB Package simulates elastic (recoverable) compaction and expansion, and inelastic (permanent) compaction of compressible fine...
Authors
Jorn Hoffmann, S. Leake, D. L. Galloway, Alicia Wilson
Land subsidence in the San Joaquin Valley, California, as of 1980 Land subsidence in the San Joaquin Valley, California, as of 1980
No abstract available.
Authors
R. Ireland, J. Poland, F. Riley
Land subsidence in the San Joaquin Valley, California, as of 1980 Land subsidence in the San Joaquin Valley, California, as of 1980
Land subsidence due to ground-water overdraft in the San Joaquin Valley began in the mid-1920 's and continued at alarming rates until surface was imported through major canals and aqueducts in the 1950 's and late 1960's. In areas where surface water replaced withdrawal of ground-water, water levels in the confined system rose sharply and subsidence slowed. In the late 1960 's and early...
Authors
R. Ireland, J. Poland, F. Riley
Land subsidence in the San Joaquin Valley, California, as of 1972 Land subsidence in the San Joaquin Valley, California, as of 1972
No abstract available.
Authors
J. Poland, B. Lofgren, R. Ireland, R.G. Pugh
Groundwater Modeling Comparison Groundwater Modeling Comparison
The Central Valley has four hydrologic regions, from north to south: the Sacramento Valley, the Delta & Eastside Streams, the San Joaquin Basin, and the Tulare Basin. Water flows from Sacramento Valley, Tulare Basin, and the San Joaquin Basin, into the Delta & Eastside Streams through the Central Valley's only natural outlet, the Carquinez Strait, on its way to the Pacific Ocean.
Central Valley Hydrologic Model Version 2 Central Valley Hydrologic Model Version 2
The Central Valley Hydrologic Model version 2 (CVHM2) is an integrated surface–subsurface hydrologic model, representing the major components of the hydrologic system of California’s Central Valley. This new decision support tool is useful for testing water management strategies in California's Central Valley.
Related
Filter Total Items: 20
Groundwater-quality data in the Western Central Valley Domestic-Supply Aquifer Study Unit, 2023: Results from the California GAMA Priority Basin Project Groundwater-quality data in the Western Central Valley Domestic-Supply Aquifer Study Unit, 2023: Results from the California GAMA Priority Basin Project
The U.S. Geological Survey collected groundwater samples from 44 wells used for domestic and small system drinking water supplies in the western Central Valley, California in 2023. The wells were sampled for the Western Central Valley domestic-supply aquifer study unit of the State Water Resources Control Board Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin...
MODFLOW-OWHM Used to Characterize the Groundwater Flow System of the Central Valley MODFLOW-OWHM Used to Characterize the Groundwater Flow System of the Central Valley
A three-dimensional groundwater flow model of the Central Valley in California was developed to aid water managers in understanding how water moves through the aquifer system, to predict water-supply scenarios, and to address issues related to subsidence. The USGS California Water Science Center made a detailed assessment of groundwater availability of the Central Valley aquifer system...
Relative distance of California's Central Valley from trough to valley edge and supporting data Relative distance of California's Central Valley from trough to valley edge and supporting data
California's Central Valley ranges from the mountain fronts toward a central trough, mainly defined by the San Joaquin and Sacramento Rivers, and the relative distance from trough to valley edges is of interest. This data release provides supplemental data for the USGS Professional Paper 1766, titled Groundwater Availability of the Central Valley Aquifer, California and provides...
Little Dry Creek and Cottonwood Creek Sediment Transport Data, 2012-2018, San Joaquin Watershed in the California Central Valley Little Dry Creek and Cottonwood Creek Sediment Transport Data, 2012-2018, San Joaquin Watershed in the California Central Valley
Two tributary watersheds¬ Cottonwood Creek and Little Dry Creek¬ to the greater San Joaquin watershed, in California’s Central Valley were assessed for sediment and flow dynamics, between water years (Oct. 1 to Sept. 30) 2011 and 2019. The two systems deliver suspended sediment to the San Joaquin River below Friant Dam, California. Because these two creeks are directly down river of...
Central Valley Hydrologic Model version 2 (CVHM2): Well Log Lithology Database and Texture Model Central Valley Hydrologic Model version 2 (CVHM2): Well Log Lithology Database and Texture Model
These data encompass the geologic framework model for the Central Valley Hydrologic Model Version 2 (CVHM2) study. This includes (1) the Well Log Database which contains borehole information and lithology used in creating the geologic framework, (2) Well Logs with Classification Information which explains how percent coarse values were determined for each borehole, and (3) the Three...
Central Valley Hydrologic Model version 2 (CVHM2): Observation Data (Groundwater Level, Streamflow, Subsidence) (ver. 2.2, May 2024) Central Valley Hydrologic Model version 2 (CVHM2): Observation Data (Groundwater Level, Streamflow, Subsidence) (ver. 2.2, May 2024)
This digital dataset includes three sets of observational data (groundwater level, streamflow, subsidence) used to calibrate the updated Central Valley Hydrologic Model (CVHM2). CVHM2 is a tool that can be used to quantify the sustainability of groundwater resources in the Central Valley.
Central Valley Hydrologic Model version 2 (CVHM2): Subsidence Package Central Valley Hydrologic Model version 2 (CVHM2): Subsidence Package
This digital dataset contains datasets used to develop the Subsidence Package in CVHM2. Data includes number of delay interbeds per model cell (Neq), equivalent thickness for a delay interbeds (Beq), and the zones used to define subsidence parameters. Beq and Neq are calculated from the database of well logs, which is provided in the parent dataset. Five zones are used to define...
Central Valley Hydrologic Model version 2 (CVHM2): Groundwater Pumping Central Valley Hydrologic Model version 2 (CVHM2): Groundwater Pumping
This digital dataset contains datasets used to develop the Multi Node Well (MNW2) Package in CVHM2. It includes well locations, well properties for Municipal Pumping, Rural Pumping, Recovery Pumping, and Agricultural Pumping. The data release also includes pumping rates for Municipal Pumping, Rural Pumping, Recovery Pumping. Agricultural Pumping are estimated in CVHM2 by the farm process...
Central Valley Hydrologic Model version 2 (CVHM2): Surface Water Network for Water Years 1922 - 2019 (ver. 2.1, June 2024) Central Valley Hydrologic Model version 2 (CVHM2): Surface Water Network for Water Years 1922 - 2019 (ver. 2.1, June 2024)
This digital dataset contains the monthly inflows and diversions to the surface-water network in the updated Central Valley Hydrologic Model (CVHM2) for water years 1922-2019. The surface-water network simulates the Central Valley’s complex conveyance network through the Streamflow Routing Package (SFR2) and the Farm-Process (FMP4) at 65 inflow locations with 271 stream segments and 13...
Central Valley Hydrologic Model version 2 (CVHM2): Model Setup Files Central Valley Hydrologic Model version 2 (CVHM2): Model Setup Files
The model setup of the updated Central Valley Hydrologic Model (CVHM2) is similar to the original Central Valley Hydrologic Model (CVHM). The differences in the model setup are described here as either model discretization, tidal influence, or drain flow. For model discretization, CVHM2 has 13 layers compared to 10 in CVHM. Tidal data for the San Francisco Bay and its influence on the...
Central Valley Hydrologic Model version 2 (CVHM2): Land Use Properties (ver. 3.0, October 2023) Central Valley Hydrologic Model version 2 (CVHM2): Land Use Properties (ver. 3.0, October 2023)
This digital dataset contains three types of information about the land use properties used in the updated Central Valley Hydrologic Model (CVHM2): land use shapefile showing primary land use type for a model cell through time, soil data using the curve number for each region and zone, and farm process parameter values including crop coefficients and rooting depths.
Central Valley Hydrologic Model version 2 (CVHM2): Climate Data (Precipitation, Evapotranspiration, Recharge, Runoff) from the Basin Characterization Model for water years 1922-2019 (ver. 2.0, June 2023) Central Valley Hydrologic Model version 2 (CVHM2): Climate Data (Precipitation, Evapotranspiration, Recharge, Runoff) from the Basin Characterization Model for water years 1922-2019 (ver. 2.0, June 2023)
This digital dataset consists of monthly climate data from the Basin Characterization Model v8 (BCMv8) for the updated Central Valley Hydrologic Model (CVHM2) for water years 1922 to 2019. The BCMv8 data are available in a separate data release titled "The Basin Characterization Model - A regional water balance software package (BCMv8) data release and model archive for hydrologic...
Central Valley Hydrologic Model version 2 (CVHM2): Decision support tool for groundwater and land subsidence management Central Valley Hydrologic Model version 2 (CVHM2): Decision support tool for groundwater and land subsidence management
The San Joaquin Valley (SJV) of California is one of the world’s most productive agricultural regions. Reliance on groundwater has led to some of the greatest rates of human-induced land subsidence in the world in the 20th century, as well as more recently. The United States Geological Survey (USGS) has recently developed an integrated surface–subsurface hydrologic model, the Central...
Authors
Kirk Nelson, Nigel Quinn, Jonathan Traum
Groundwater sustainability and land subsidence in California’s Central Valley Groundwater sustainability and land subsidence in California’s Central Valley
The Central Valley of California is one of the most prolific agricultural regions in the world. Agriculture is reliant on the conjunctive use of surface-water and groundwater. The lack of available surface-water and land-use changes have led to pumping-induced groundwater-level and storage declines, land subsidence, changes to streamflow and the environment, and the degradation of water...
Authors
Claudia C. Faunt, Jonathan Traum, Scott Boyce, Whitney Seymour, Elizabeth Jachens, Justin Brandt, Michelle Sneed, Sandra Bond, Marina Marcelli
Water availability and land subsidence in the Central Valley, California, USA Water availability and land subsidence in the Central Valley, California, USA
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially, agriculture relies heavily on local groundwater. In the...
Authors
Claudia C. Faunt, Michelle Sneed, Jonathan Traum, Justin Brandt
Water availability and subsidence in California's Central Valley Water availability and subsidence in California's Central Valley
The Central Valley in California (USA) covers about 52,000 km2 and is one of the most productive agricultural regions in the world. This agriculture relies heavily on surface-water diversions and groundwater pumpage to meet irrigation water demand. Because the valley is semi-arid and surface-water availability varies substantially, agriculture relies heavily on local groundwater. In the...
Authors
Claudia Faunt, Michelle Sneed, Jonathan Traum, Justin Brandt
Land subsidence along the Delta-Mendota Canal in the northern part of the San Joaquin Valley, California, 2003-10 Land subsidence along the Delta-Mendota Canal in the northern part of the San Joaquin Valley, California, 2003-10
Extensive groundwater withdrawal from the unconsolidated deposits in the San Joaquin Valley caused widespread aquifer-system compaction and resultant land subsidence from 1926 to 1970—locally exceeding 8.5 meters. The importation of surface water beginning in the early 1950s through the Delta-Mendota Canal and in the early 1970s through the California Aqueduct resulted in decreased...
Authors
Michelle Sneed, Justin Brandt, Mike Solt
California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley California's Central Valley Groundwater Study: A Powerful New Tool to Assess Water Resources in California's Central Valley
Competition for water resources is growing throughout California, particularly in the Central Valley. Since 1980, the Central Valley's population has nearly doubled to 3.8 million people. It is expected to increase to 6 million by 2020. Statewide population growth, anticipated reductions in Colorado River water deliveries, drought, and the ecological crisis in the Sacramento-San Joaquin...
Authors
Claudia C. Faunt, Randall Hanson, Kenneth Belitz, Laurel Rogers
Groundwater availability of the Central Valley Aquifer, California Groundwater availability of the Central Valley Aquifer, California
California's Central Valley covers about 20,000 square miles and is one of the most productive agricultural regions in the world. More than 250 different crops are grown in the Central Valley with an estimated value of $17 billion per year. This irrigated agriculture relies heavily on surface-water diversions and groundwater pumpage. Approximately one-sixth of the Nation's irrigated land...
MODFLOW-2000 ground-water model-user guide to the Subsidence and Aquifer-System Compaction (SUB) Package MODFLOW-2000 ground-water model-user guide to the Subsidence and Aquifer-System Compaction (SUB) Package
This report documents a computer program, the Subsidence and Aquifer-System Compaction (SUB) Package, to simulate aquifer-system compaction and land subsidence using the U.S. Geological Survey modular finite-difference ground-water flow model, MODFLOW-2000. The SUB Package simulates elastic (recoverable) compaction and expansion, and inelastic (permanent) compaction of compressible fine...
Authors
Jorn Hoffmann, S. Leake, D. L. Galloway, Alicia Wilson
Land subsidence in the San Joaquin Valley, California, as of 1980 Land subsidence in the San Joaquin Valley, California, as of 1980
No abstract available.
Authors
R. Ireland, J. Poland, F. Riley
Land subsidence in the San Joaquin Valley, California, as of 1980 Land subsidence in the San Joaquin Valley, California, as of 1980
Land subsidence due to ground-water overdraft in the San Joaquin Valley began in the mid-1920 's and continued at alarming rates until surface was imported through major canals and aqueducts in the 1950 's and late 1960's. In areas where surface water replaced withdrawal of ground-water, water levels in the confined system rose sharply and subsidence slowed. In the late 1960 's and early...
Authors
R. Ireland, J. Poland, F. Riley
Land subsidence in the San Joaquin Valley, California, as of 1972 Land subsidence in the San Joaquin Valley, California, as of 1972
No abstract available.
Authors
J. Poland, B. Lofgren, R. Ireland, R.G. Pugh
Groundwater Modeling Comparison Groundwater Modeling Comparison
The Central Valley has four hydrologic regions, from north to south: the Sacramento Valley, the Delta & Eastside Streams, the San Joaquin Basin, and the Tulare Basin. Water flows from Sacramento Valley, Tulare Basin, and the San Joaquin Basin, into the Delta & Eastside Streams through the Central Valley's only natural outlet, the Carquinez Strait, on its way to the Pacific Ocean.
Central Valley Hydrologic Model Version 2 Central Valley Hydrologic Model Version 2
The Central Valley Hydrologic Model version 2 (CVHM2) is an integrated surface–subsurface hydrologic model, representing the major components of the hydrologic system of California’s Central Valley. This new decision support tool is useful for testing water management strategies in California's Central Valley.