Elizabeth Jachens
Elizabeth Jachens is a hydrologist with the U.S. Geological Survey in the California Water Science Center in the Groundwater Availability and Use Assessments project.
Elizabeth graduated with her Ph.D. in Water Resources Engineering from Oregon State University in March of 2020. Her research focused on the use of recession analysis to characterize watershed responses to drought. She earned an M.S. in Water Resources Engineering and a Graduate Certificate in Water Conflict Management and Transformation, both from Oregon State University in 2019. Elizabeth graduated with a B.S. in Civil Engineering with a minor in math from California State University, Chico in 2015.
Science and Products
Geonarrative "Colorado River Basin's Millenium Drought--A Few Dry Decades or a New Normal?
USGS Scientists have created a new geonarrative with graphics, animations, and text providing information about whether the Basin could be managed for drought conditions (relatively short-term dry conditions) or for aridification (a much longer period of dry conditions). This geonarrative describes ways that USGS can provide information that informs decision making for those situations in the...
Water Availability of the Salton Sea Watershed
Throughout history, the Salton Sea has formed and dried up due to flooding from the Colorado River. It was most recently formed in 1905 when the Colorado River broke through an irrigation canal and flowed uncontrolled into the Salton Sea watershed. The Salton Sea is a terminal lake (it has no outlets). It is also a transboundary watershed, with area in both the state of California and Mexico’s...
Filter Total Items: 16
Lower Salinas Valley Hydrologic Models: Input Inflow Data Lower Salinas Valley Hydrologic Models: Input Inflow Data
This dataset provides time series for the ungaged watershed inflows and associated inflow points for the Lower Salinas Valley Hydrologic Models (SVHM), including the Salinas Valley Integrated Hydrologic Model (SVIHM) and the Salinas Valley Operational Model (SVOM). Monthly outflows from watersheds that do not have gages that surround the Salinas River Valley are used in the Lower Salinas...
Paso Robles Hydrologic Model: Future Climate Data Paso Robles Hydrologic Model: Future Climate Data
This digital dataset contains the gridded future climate data for the same modeled extent as the Paso Robles Groundwater Basin Model (GEOSCIENCE and Todd Groundwater, 2015). The monthly climate data for the Paso Robles Hydrologic Model are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios (Henson and others, 2024). SCRBS considers one baseline climate...
Salinas Valley Hydrologic System: Land Use Data Salinas Valley Hydrologic System: Land Use Data
This digital dataset contains the land use data used for both the Salinas Valley Hydrologic Models (SVHM): the Salinas Valley Watershed Model (SVWM), the Salinas Valley Integrated Hydrologic Model (SVIHM), and Salinas Valley Operational Model (SVOM)). Land use data were compiled from available state, local, and federal datasets. Available multi-year composite land use data were...
Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF) Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF)
This model archive contains the datasets, procedures, and necessary program code used to describe the Salinas Valley Watershed Model (SVWM). The SVWM simulates the daily historical water balance and hydrologic conditions for the Salinas Valley study area including the many un-gaged tributary subdrainages in the rugged and mountainous upland areas surrounding flat-lying valley lowlands...
Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA
This data release provides borehole location and lithology information from selected boreholes in the East Mesa and surrounding areas of Imperial County, California. The area of focus includes parts of the Imperial, Ogilby, and Amos Valley groundwater basins. The purpose of the study is to estimate the future Total Dissolved Solids (TDS) concentration in groundwater pumped by the LCWPS...
Carmel River Basin Hydrologic Models: Future Climate Data Carmel River Basin Hydrologic Models: Future Climate Data
This digital dataset contains the gridded future climate data used for the Carmel River Basin Hydrologic Model. The daily climate data for the Carmel River Basin Hydrologic Model Hydrologic Model are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios (Henson and others, 2024). SCRBS considers one baseline climate scenario that represents recent historical...
Lower Salinas Valley Hydrologic Models: Future Climate Data Lower Salinas Valley Hydrologic Models: Future Climate Data
This digital dataset contains the gridded future climate data used for the Lower Salinas Valley Hydrologic Models. The monthly climate data for Lower Salinas Valley Hydrologic Models are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios [Henson and others, 2024). SCRBS considers one baseline climate scenario that represents recent historical climate...
Salinas and Carmel Rivers Basin Study (SCRBS): Future Climate Salinas and Carmel Rivers Basin Study (SCRBS): Future Climate
This digital dataset contains the baseline and future climate data used as the basis for analysis of current and future water supplies and demands in the Salinas and Carmel Rivers Basin Study (SCRBS). SCRBS uses a suite of integrated hydrologic models to explore impacts of future climate and socioeconomic scenarios on water supplies and demands in the basins. SCRBS considers one baseline...
Lower Salinas Valley Hydrologic Models: Agricultural and Municipal Water Supply and Groundwater Data (ver. 2.1, August 2024) Lower Salinas Valley Hydrologic Models: Agricultural and Municipal Water Supply and Groundwater Data (ver. 2.1, August 2024)
This digital dataset contains the datasets related to agricultural and municipal water supply and groundwater in the Lower Salinas Valley Hydrologic Models (LSVHM), including the Salinas Valley Operational Model (SVOM) and the Salinas Valley Integrated Hydrologic Model (SVIHM). Groundwater inflow and outflow data include reported groundwater pumpage and groundwater elevations obtained...
Lower Salinas Valley Hydrologic Models: Climate Data Lower Salinas Valley Hydrologic Models: Climate Data
This digital dataset contains the climate data used for the Lower Salinas Valley Hydrologic Models (Salinas Valley Integrated Hydrologic Model (SVIHM) and Salinas Valley Operational Model (SVOM)). The monthly climate data for the Lower Salinas Valley Hydrologic Models are based on the regional climate data for the Salinas Valley Hydrologic System [Hevesi and others, 2022]. To develop the...
Salinas Valley Operational Model: Input Operational Data (ver. 2.0, September 2023) Salinas Valley Operational Model: Input Operational Data (ver. 2.0, September 2023)
This digital dataset contains the surface water operational data used for the Salinas Valley Operational Model (SVOM) including the timeseries data and the operational rules. While much of the input data is shared between the Salinas Valley Operational Model (SVOM) and the Salinas Valley Integrated Hydrologic Model (SVIHM), the SVOM has additional input data specific to the purpose and...
Salinas Valley Hydrologic System: Regional Climate Data (ver 2.0, February 2025) Salinas Valley Hydrologic System: Regional Climate Data (ver 2.0, February 2025)
This digital dataset contains the climate data used for the Salinas Valley Hydrologic System, including the Salinas Valley Watershed Model (SVWM) and the Lower Salinas Valley Hydrologic Models (Salinas Valley Integrated Hydrologic Model (SVIHM) and Salinas Valley Operational Model (SVOM)). The climate data include spatially distributed daily precipitation, maximum and minimum air...
Application of Hydrologic Simulation Program—FORTRAN (HSPF) as part of an integrated hydrologic model for the Salinas Valley, California Application of Hydrologic Simulation Program—FORTRAN (HSPF) as part of an integrated hydrologic model for the Salinas Valley, California
The U.S. Geological Survey (USGS), in cooperation with the Monterey County Water Resources Agency, conducted studies to help evaluate the surface-water and groundwater resources of the Salinas Valley study area, consisting of the entire Salinas River watershed and several smaller, adjacent coastal watersheds draining into Monterey Bay. The Salinas Valley study area is a highly productive...
Authors
Joseph A. Hevesi, Wesley R. Henson, Randall T. Hanson, Elizabeth Rae Jachens, Sandra Bond, Marisa Melody Earll, Deidre Herbert
Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California
The area surrounding the Salinas Valley groundwater basin in Monterey and San Luis Obispo Counties of California is a highly productive agricultural area, contributes significantly to the local economy, and provides a substantial portion of vegetables and other agricultural commodities to the Nation. This region of California provides about half of the Nation’s lettuce, celery, broccoli...
Authors
Wesley R. Henson, Randy Hanson, Scott E. Boyce, Joseph A. Hevesi, Elizabeth Rae Jachens
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 A. Traum, Scott E. Boyce, Whitney A. Seymour, Elizabeth Rae Jachens, Justin T. Brandt, Michelle Sneed, Sandra Bond, Marina Marcelli
Science and Products
Geonarrative "Colorado River Basin's Millenium Drought--A Few Dry Decades or a New Normal?
USGS Scientists have created a new geonarrative with graphics, animations, and text providing information about whether the Basin could be managed for drought conditions (relatively short-term dry conditions) or for aridification (a much longer period of dry conditions). This geonarrative describes ways that USGS can provide information that informs decision making for those situations in the...
Water Availability of the Salton Sea Watershed
Throughout history, the Salton Sea has formed and dried up due to flooding from the Colorado River. It was most recently formed in 1905 when the Colorado River broke through an irrigation canal and flowed uncontrolled into the Salton Sea watershed. The Salton Sea is a terminal lake (it has no outlets). It is also a transboundary watershed, with area in both the state of California and Mexico’s...
Filter Total Items: 16
Lower Salinas Valley Hydrologic Models: Input Inflow Data Lower Salinas Valley Hydrologic Models: Input Inflow Data
This dataset provides time series for the ungaged watershed inflows and associated inflow points for the Lower Salinas Valley Hydrologic Models (SVHM), including the Salinas Valley Integrated Hydrologic Model (SVIHM) and the Salinas Valley Operational Model (SVOM). Monthly outflows from watersheds that do not have gages that surround the Salinas River Valley are used in the Lower Salinas...
Paso Robles Hydrologic Model: Future Climate Data Paso Robles Hydrologic Model: Future Climate Data
This digital dataset contains the gridded future climate data for the same modeled extent as the Paso Robles Groundwater Basin Model (GEOSCIENCE and Todd Groundwater, 2015). The monthly climate data for the Paso Robles Hydrologic Model are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios (Henson and others, 2024). SCRBS considers one baseline climate...
Salinas Valley Hydrologic System: Land Use Data Salinas Valley Hydrologic System: Land Use Data
This digital dataset contains the land use data used for both the Salinas Valley Hydrologic Models (SVHM): the Salinas Valley Watershed Model (SVWM), the Salinas Valley Integrated Hydrologic Model (SVIHM), and Salinas Valley Operational Model (SVOM)). Land use data were compiled from available state, local, and federal datasets. Available multi-year composite land use data were...
Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF) Salinas Valley Watershed Model: Application of Hydrologic Simulation Program-FORTRAN (HSPF)
This model archive contains the datasets, procedures, and necessary program code used to describe the Salinas Valley Watershed Model (SVWM). The SVWM simulates the daily historical water balance and hydrologic conditions for the Salinas Valley study area including the many un-gaged tributary subdrainages in the rugged and mountainous upland areas surrounding flat-lying valley lowlands...
Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA Select Borehole Data for the East Mesa area and vicinity, Imperial County, CA
This data release provides borehole location and lithology information from selected boreholes in the East Mesa and surrounding areas of Imperial County, California. The area of focus includes parts of the Imperial, Ogilby, and Amos Valley groundwater basins. The purpose of the study is to estimate the future Total Dissolved Solids (TDS) concentration in groundwater pumped by the LCWPS...
Carmel River Basin Hydrologic Models: Future Climate Data Carmel River Basin Hydrologic Models: Future Climate Data
This digital dataset contains the gridded future climate data used for the Carmel River Basin Hydrologic Model. The daily climate data for the Carmel River Basin Hydrologic Model Hydrologic Model are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios (Henson and others, 2024). SCRBS considers one baseline climate scenario that represents recent historical...
Lower Salinas Valley Hydrologic Models: Future Climate Data Lower Salinas Valley Hydrologic Models: Future Climate Data
This digital dataset contains the gridded future climate data used for the Lower Salinas Valley Hydrologic Models. The monthly climate data for Lower Salinas Valley Hydrologic Models are based on the Salinas and Carmel River Basins Study (SCRBS) future climate scenarios [Henson and others, 2024). SCRBS considers one baseline climate scenario that represents recent historical climate...
Salinas and Carmel Rivers Basin Study (SCRBS): Future Climate Salinas and Carmel Rivers Basin Study (SCRBS): Future Climate
This digital dataset contains the baseline and future climate data used as the basis for analysis of current and future water supplies and demands in the Salinas and Carmel Rivers Basin Study (SCRBS). SCRBS uses a suite of integrated hydrologic models to explore impacts of future climate and socioeconomic scenarios on water supplies and demands in the basins. SCRBS considers one baseline...
Lower Salinas Valley Hydrologic Models: Agricultural and Municipal Water Supply and Groundwater Data (ver. 2.1, August 2024) Lower Salinas Valley Hydrologic Models: Agricultural and Municipal Water Supply and Groundwater Data (ver. 2.1, August 2024)
This digital dataset contains the datasets related to agricultural and municipal water supply and groundwater in the Lower Salinas Valley Hydrologic Models (LSVHM), including the Salinas Valley Operational Model (SVOM) and the Salinas Valley Integrated Hydrologic Model (SVIHM). Groundwater inflow and outflow data include reported groundwater pumpage and groundwater elevations obtained...
Lower Salinas Valley Hydrologic Models: Climate Data Lower Salinas Valley Hydrologic Models: Climate Data
This digital dataset contains the climate data used for the Lower Salinas Valley Hydrologic Models (Salinas Valley Integrated Hydrologic Model (SVIHM) and Salinas Valley Operational Model (SVOM)). The monthly climate data for the Lower Salinas Valley Hydrologic Models are based on the regional climate data for the Salinas Valley Hydrologic System [Hevesi and others, 2022]. To develop the...
Salinas Valley Operational Model: Input Operational Data (ver. 2.0, September 2023) Salinas Valley Operational Model: Input Operational Data (ver. 2.0, September 2023)
This digital dataset contains the surface water operational data used for the Salinas Valley Operational Model (SVOM) including the timeseries data and the operational rules. While much of the input data is shared between the Salinas Valley Operational Model (SVOM) and the Salinas Valley Integrated Hydrologic Model (SVIHM), the SVOM has additional input data specific to the purpose and...
Salinas Valley Hydrologic System: Regional Climate Data (ver 2.0, February 2025) Salinas Valley Hydrologic System: Regional Climate Data (ver 2.0, February 2025)
This digital dataset contains the climate data used for the Salinas Valley Hydrologic System, including the Salinas Valley Watershed Model (SVWM) and the Lower Salinas Valley Hydrologic Models (Salinas Valley Integrated Hydrologic Model (SVIHM) and Salinas Valley Operational Model (SVOM)). The climate data include spatially distributed daily precipitation, maximum and minimum air...
Application of Hydrologic Simulation Program—FORTRAN (HSPF) as part of an integrated hydrologic model for the Salinas Valley, California Application of Hydrologic Simulation Program—FORTRAN (HSPF) as part of an integrated hydrologic model for the Salinas Valley, California
The U.S. Geological Survey (USGS), in cooperation with the Monterey County Water Resources Agency, conducted studies to help evaluate the surface-water and groundwater resources of the Salinas Valley study area, consisting of the entire Salinas River watershed and several smaller, adjacent coastal watersheds draining into Monterey Bay. The Salinas Valley study area is a highly productive...
Authors
Joseph A. Hevesi, Wesley R. Henson, Randall T. Hanson, Elizabeth Rae Jachens, Sandra Bond, Marisa Melody Earll, Deidre Herbert
Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California Salinas Valley integrated hydrologic and reservoir operations models, Monterey and San Luis Obispo Counties, California
The area surrounding the Salinas Valley groundwater basin in Monterey and San Luis Obispo Counties of California is a highly productive agricultural area, contributes significantly to the local economy, and provides a substantial portion of vegetables and other agricultural commodities to the Nation. This region of California provides about half of the Nation’s lettuce, celery, broccoli...
Authors
Wesley R. Henson, Randy Hanson, Scott E. Boyce, Joseph A. Hevesi, Elizabeth Rae Jachens
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 A. Traum, Scott E. Boyce, Whitney A. Seymour, Elizabeth Rae Jachens, Justin T. Brandt, Michelle Sneed, Sandra Bond, Marina Marcelli