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Central Valley Hydrologic Model version 2 (CVHM2): Small Watershed Climate Data (Recharge, Runoff) 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 California, water years 1896-2020". The data were modified by: (1) extracting the data from the data source for the relevant model domain and times, and (2) rescaling the 270-meter BCMv8 grid to the small watersheds that contribute boundary flow to the CVHM2 model for the hydrologic variables recharge and runoff. The three data pieces... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Central Valley, Climate, Hydrology, Potential Evapotranspiration, All tags... Precipitation, United States, Water Budget, climatologyMeteorologyAtmosphere, environment, farming, geoscientificInformation, Fewer tags Field measurements for characterizing salmon spawning habitat in two restored reaches of the lower Merced River, California To support an investigation of the effectiveness of a large-scale river restoration project, several types of field data were collected from two gravel-bed reaches of the regulated lower Merced River in California's Central Valley, primarily in the fall of 2016. These data sets were intended to characterize salmon spawning habitat and identify factors influencing spawning site selection. This parent data release includes links to child pages for the following data sets: 1) Bulk samples of streambed sediment used to characterize the subsurface grain size distribution. 2) Pebble counts used to characterize the sediment grain size distribution of the bed surface. 3) Force gage measurements used to parameterize a... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Central Valley, Ecology, Geomorphology, Gravel friction angle, All tags... Habitat, Merced River, River, River restoration, Salmon, Sediment, Streambed hydraulic conductivity, USGS Science Data Catalog (SDC), Water Resources, Wildlife Biology, flow modeling, spawning, Fewer tags Surveys of channel bed topography from two restored reaches of the lower Merced River, California Surveys of channel and floodplain topography were used to characterize the morphology of two reaches of the lower Merced River in California's Central Valley and to parameterize a hydraulic model. These data were collected to support research intended to evaluate the extent to which large-scale restoration projects provided improved salmon spawning habitat. A related goal of this study was to improve our understanding of the geomorphic factors influencing spawning site selection by salmon. At the Merced River Ranch field site, river channel and floodplain topography was measured using a combination of real-time kinematic (RTK) GPS for wadable parts of the channel, an echo sounder for deep pools, and photogrammetry... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Central Valley, Elevation, Habitat, Merced River, All tags... River, River restoration, Salmon, Topography, channel morphology, flow modeling, Fewer tags Central Valley Hydrologic Model version 2 (CVHM2): Municipal Pumping This digital dataset contains the municipal pumping dataset used to develop the Multi Node Well (MNW2) Package in the updated Central Valley Hydrologic Model (CVHM2). It includes well locations, well properties, and pumping rates for Municipal Pumping. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Central Valley, Groundwater, Groundwater Pumping, Municipal Pumping, All tags... United States, environment, Fewer tags Assessment of nutrients and water-quality constituents at the Sacramento-San Joaquin River Confluence during a phytoplankton bloom in July 2017 This report documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll. Data-collection were conducted over one day in July 2017 when continuous monitoring stations detected elevated chlorophyll concentration and decreasing nitrate concentrations. Categories: Data; Tags: California, Central Valley, Environmental Health, Geochemistry, Sacramento River, All tags... Sacramento-San Joaquin Delta, USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, Yolo Bypass, biogeochemistry, biota, delta, drinking water use, environment, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, visualization methods, water quality, water quality, Fewer tags Assessment of nutrients and water-quality constituents in the North Delta during Yolo Bypass flooding events in March 2017 The data release contains data for the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta in the Sacramento-San Joaquin River Delta of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, and chlorophyll. Data-collection cruises were conducted over two days in March 2017 during a high flow event when Sacramento Valley flood waters inundate the Yolo Bypass. Categories: Data; Tags: Cache Slough, California, Central Valley, Environmental Health, Geochemistry, All tags... Lower Sacramento, Sacramento River, Sacramento-San Joaquin Delta, USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, Yolo Bypass, biogeochemistry, biota, delta, drinking water use, environment, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, visualization methods, water quality, Fewer tags Crop Water Use in the Central Valley of California using Landsat-derived evapotranspiration Understanding how different crops use water over time is essential for planning and managing water allocation, water rights, and agricultural production. The main objective of this paper is to characterize the spatiotemporal dynamics of crop water use in the Central Valley of California using Landsat-based annual actual evapotranspiration (ETa) from 2008-2018 derived from the Operational Simplified Surface Energy Balance (SSEBop) model. Crop water use for ten crops are characterized at multiple scales. The Mann-Kendall trend analysis revealed a significant increase in area cultivated with almonds and their water use, with an annual rate of change of 16,327 hectares in area and 13,488 ha-m in water use. Conversely,... Tags: Central Valley, Hydrology, Kern County, California, Land Use Change, Remote Sensing, All tags... SSEBop model, USGS Science Data Catalog (SDC), Water Resources, evapotranspiration, landsat, remote sensing, time-series analysis, Fewer tags 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. First posted - August 11, 2022 Revised - January 2023 (version 2.0) Revised - September 2023 (version 3.0) Categories: Data Release - Revised; Tags: California, Central Valley, Crop Coefficients, Land Use, Soil Data, All tags... USGS Science Data Catalog (SDC), United States, environment, Fewer tags Assessing spatial variability of nutrients, phytoplankton and related water-quality constituents in the California Sacramento-San Joaquin Delta at the landscape scale: 2020-2021 High-resolution mapping surveys The dataset documents the spatial and temporal variability of nutrients, phytoplankton, and related water quality parameters at high spatial resolution in the Sacramento-San Joaquin River Delta and Suisun Bay of California, USA. The dataset includes nitrate, ammonium, orthophosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition. Data were collected under different environmental/flow conditions in June, July, August, and October of 2020, and May, July, and October of 2021. The data release consists of a .xml document, and .txt and shapefile documents. Descriptions for each document and file are listed in the... Categories: Data; Tags: Aquatic Biology, California, Central Valley, Ecology, Geochemistry, All tags... Hydrology, Liberty Island, Sacramento River, Sacramento-San Joaquin Delta, Suisun Bay, USGS Science Data Catalog (SDC), United States, Water Quality, Water Resources, biogeochemistry, biota, delta, drinking water use, environment, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, visualization methods, water quality, water quality, Fewer tags Spatial assessment of nutrients and water-quality constituents in Suisun Marsh with the salinity control gate reoperation experiment; a Delta Smelt Resiliency Strategy experiment 2018 This data release documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in Suisun Marsh and Suisun Bay in the San Francisco Estuary of California, USA. The data set includes nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, turbidity, chlorophyll, blue-green algal pigments, and phytoplankton community structure. Data-collection cruises were conducted under three different environmental/flow conditions between July - September 2018 that coincided with conditions prior to, during, and following the Suisun Marsh Salinity Control Gates Summer Action. The action is part of the Delta Smelt Resiliency... Categories: Data; Tags: California, Central Valley, Geochemistry, Sacramento River, Sacramento-San Joaquin Delta, All tags... Salinity, San Francisco Estuary, Suisun Bay, Suisun Marsh, USGS Science Data Catalog (SDC), United States, Water Quality, biogeochemistry, biota, delta, drinking water use, environment, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, residence time, statistical analysis, visualization methods, water isotopes, water quality, water quality, Fewer tags 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 California, water years 1896-2020" that accompanies the USGS Techniques and Methods report titled: "The Basin Characterization Model - A Regional Water Balance Software Package". The BCMv8 data are extracted from the state-wide data for the CVHM2 modeled area for water years 1922 to 2019. Climate data for CVHM2 are presented in two child... Categories: Data Release - Revised; Tags: California, Central Valley, Climate, Hydrology, Potential Evapotranspiration, All tags... Precipitation, Recharge, Runoff, USGS Science Data Catalog (SDC), United States, Water Budget, climatologyMeteorologyAtmosphere, environment, farming, geoscientificInformation, Fewer tags 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 general head boundary was added in CVHM2. Drain flow was not included in CVHM1 for the west side of the San Joaquin Valley, and was added in CVHM2. Tags: California, Central Valley, Model Discretization, Model Layer Thickness, Model Layers, All tags... USGS Science Data Catalog (SDC), United States, environment, Fewer tags Water chemistry data for samples collected at groundwater sites near the Fruitvale oil field, September 2016–February 2017, Kern County, California (ver. 2.0, July 2020) As part of the California State Water Resources Control Board’s Oil and Gas Regional Monitoring Program , the U.S. Geological Survey collected groundwater and quality-control (QC) samples during September 2016–February 2017 from 14 water-production wells located within a one-mile buffer zone of and in the Fruitvale Oil field, Kern County, California. Samples were analyzed for water-quality indicators, major and minor ions, nutrients, trace elements, volatile organic compounds, naturally occurring radioactive material, geochemical and age-dating tracers, dissolved organic carbon, dissolved standard and hydrocarbon gases, and dissolved noble and atmospheric gases. In total, 235 constituents and water-quality indicators... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bakersfield, California, Central Valley, Fruitvale, Fruitvale oil field, All tags... Groundwater, Groundwater, Kern, Kern River, Regional Monitoring Program, USGS Science Data Catalog (SDC), Water quality, aquifer, geochemistry, groundwater, groundwater aquifer, groundwater quality, inlandWaters, none, salinity mapping, water chemistry, Fewer tags Grid Cells and Modeled Groundwater Levels to Characterize Hydrologic Conditions for Public-supply Aquifers in California's Central Valley, 1990-2020 This data release documents grid cells and modeled groundwater levels for hydrologic characterization of aquifer areas used for public drinking-water supply in California’s Central Valley from 1990 to 2020. Observations of spring groundwater level (median depth to groundwater measured from January through April) were calculated for selected wells from the California Department of Water Resources (DWR) periodic groundwater level measurements dataset (DWR, 2021) that had data for >50% of years from 1990 to 2020. Spring groundwater levels for years without data were imputed by multiple linear regression on the top five most correlated records within the same Central Valley subregion (Sacramento Valley, San Joaquin... Tags: California, Central Valley, Hydrology, Sacramento Valley, San Joaquin Basin, All tags... San Joaquin Valley, Tulare Basin, USGS Science Data Catalog (SDC), Water Quality, environment, groundwater, groundwater level, inlandWaters, kriging, Fewer tags Central Valley Hydrologic Model version 2 (CVHM2): Water Banking for water years 1961-2019 (ver. 2.0, Aug 2023) Managed aquifer recharge is a water-management strategy used to meet water demands during dry periods, or periods of high-water demand, when surface-water supplies are low. One method of managed aquifer recharge uses aquifer systems as subsurface reservoirs or ‘water banks’ to effectively and economically store surface water when surplus is available, and then recover the recharged groundwater to meet water demands during droughts. During these water shortages, increased groundwater pumpage can be used to offset shortfalls in surface-water supplies. Thus, surface-water reservoirs and water banks can be used conjunctively to effectively coordinate the use of groundwater and surface water. Data were compiled for ten... Categories: Data, Data Release - Revised; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: California, Central Valley, USGS Science Data Catalog (SDC), United States, environment, All tags... groundwater, water resource management, Fewer tags High-Resolution Measurements to Identify Effects of Aquatic Vegetation on Water Quality and Stratification The dataset documents the spatial and temporal variability of nutrients and related water quality parameters at high spatial resolution in the North Delta of the Sacramento-San Joaquin River Delta of California, USA. The dataset includes surface mapping, depth profile, and discrete data for nitrate, ammonium, phosphate, dissolved organic carbon, temperature, conductivity, dissolved oxygen, and chlorophyll as well as information about phytoplankton community composition. Data-collection cruises were conducted over two time periods in July and October 2018 across two flooded islands with dense submerged aquatic vegetation beds. Little Hastings Tract received an herbicide treatment by the California Department of Boating... Categories: Data; Tags: California, Central Valley, Ecology, French Island, Geochemistry, All tags... Hydrology, Little Hastings Tract, North Delta, Sacramento-San Joaquin Delta, USGS Science Data Catalog (SDC), United States, Water Quality, biogeochemistry, delta, drinking water use, environment, high frequency, high-frequency, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, public supply water use, real-time, statistical analysis, structure, visualization methods, water quality, water quality, Fewer tags Movements, Used Habitats, and Available Habitats Identified using Step Selection Processes for Four Species of Waterfowl in California's Central Valley, 2016-2022 Step selection functions use animal movement patterns to estimate habitats available at each step along a movement track. These data were generated from four species of waterfowl (Anser albifrons [greater white-fronted goose], Anser caerulescens caerulescens [lesser snow goose], Anas platyrhynchos [mallard], Anas acuta [northern pintail]) using the Central Valley of California 2016 to 2022 that were fit with tracking devices collecting GPS data every hour (or subset to hourly locations). Observed movements were used to estimate a 2-mixture log-normal step length distribution for each species. The shorter mean step length mixture generally reflected step lengths consistent with individual immobility and GPS errors.... Categories: Data; Tags: California, Central Valley, Ecology, GPS measurement, USGS Science Data Catalog (SDC), All tags... Wildlife Biology, animal movement, animal tracking, biota, birds, functional response, habitat selection, habitat suitability indices, habitats, relative strength of selection, step selection, Fewer tags Bulk samples of streambed sediment from two restored reaches of the lower Merced River, California Bulk samples of streambed sediment were collected from two reaches of the lower Merced River in California's Central Valley to support research intended to evaluate the extent to which large-scale restoration projects provided improved salmon spawning habitat. A related goal of this study was to improve our understanding of the geomorphic factors influencing spawning site selection by salmon. The bulk samples were acquired during the summer of 2016 at the Merced River Ranch and Robinson Reach field sites using a McNeil sampler [McNeil and Ahnell, 1964]. Before collecting each sample, the surface layer was removed to avoid including surface grains as part of the sample. Surface material was scraped off to a depth... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bulk sample, California, Central Valley, Merced River, River, All tags... Salmon, Sediment, Sediment grain size, spawning, Fewer tags Central Valley Hydrologic Model version 2 (CVHM2): Land Use Properties - Grid Land Use The shapefile in this data release is the updated Central Valley Hydrologic Model (CVHM2) model grid cells with yearly land use from 1921 to 2019. Historical land use data shows the Central Valley land use prior to agricultural development. The rise of agriculture in the Central Valley is visible over time in this data set. Existing land use maps covering the Central Valley were used as sources and were assigned to model grids cells for their observed land use year. This source data was used to estimate land use over time for years where no land use map was available. This was accomplished by comparing land use cells between two years where source data is available. Cells where there is no land use change remain... Tags: California, Central Valley, climatologyMeteorologyAtmosphere, farming, land use and land cover 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, which includes: (1) the status of groundwater resources; (2) how these resources have changed over time, particularly related to subsidence; and (3) tools to assess system responses to stresses from future human uses and climate variability and change. This effort builds on previous investigations, such as the USGS Central Valley... Categories: Data; Tags: California, Central Valley, Corcoran Clay, Sacramento Valley, San Joaquin Basin, All tags... San Joaquin Valley, Tulare Basin, USGS Science Data Catalog (SDC), Water Resources, environment, groundwater and surface-water interaction, groundwater flow modeling, groundwater level, land subsidence, Fewer tags 1 2 3 »