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Modern groundwater-quality, depth, and well-construction data for selected wells in the San Joaquin Valley, California, 1993-2015 Groundwater-quality data collected between 1993 and 2015 were compiled from the U.S. Geological Survey (USGS) National Water Information System (NWIS) database for 722 wells in the San Joaquin Valley (SJV). Groundwater-quality data retrieved included lab analyses of complete major ion data (calcium, magnesium, sodium, potassium, chloride, sulfate, nitrate, alkalinity, bicarbonate, carbonate, silica, and TDS) for 613 samples, and an additional 109 samples with measured values of specific conductance. Most of these wells were sampled as part of the California Groundwater Ambient Monitoring and Assessment (GAMA) Program Priority Basin Project or the USGS National Water Quality Assessment (NAWQA) Program. In addition... Categories: Data; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, California, Central Valley, Environment, GAMA, All tags... Geochemistry, Geographic Information Systems (GIS), Groundwater, Hydrogeology, Hydrology, NAWQA, PHREEQC, Public Supply Water Use, San Joaquin Valley, Total Dissolved Solids (TDS), Trends, United States, Water Quality, Fewer tags 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 Historic Depth-to-Water, San Joaquin Valley, California, 1910 Mendenhall and others (1916) published depth-to-water data compiled in 1910 for all known wells in the San Joaquin Valley, California. Data for the 3,429 wells having depth-to-water of greater than zero feet were used to construct an interpolated depth-to-water surface for the entire SJV. This map represents groundwater levels in approximately 1910, prior to extensive development of the groundwater system. A depth-to-water contour map with contour lines of 5, 10, 15, and 25 meters below land surface was then drawn from this raster surface. Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Agriculture, ArcGIS, California, Central Valley, Depth-to-Water, All tags... Groundwater, Historic, Hydrogeology, Hydrology, Public Supply Water Use, San Joaquin Valley, United States, 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 Classification of Waterfowl Habitat, and Quantification of Interannual Space Use and Movement Distance from Primary Roosts to Night Feeding Locations by Waterfowl in California for October - March of 2015 through 2018 Technological advancements in Global Positioning System (GPS) telemetry markers allow almost real-time observation of waterfowl movements and habitat selection. Telemetry data on ducks marked with GPS transmitters can be used to evaluate performance of remote sensing data (for example, dynamic open-water maps produced by Point Blue Conservation Science) for classifying habitats that are flooded and available for waterfowl. Translating dynamic open-water maps to waterfowl-relevant habitat maps provides a major improvement for wildlife researchers and managers to assist in their assessments of the areas and habitats used by waterfowl as hydrologic conditions change, both temporally and spatially. Suitable habitat... Tags: California, Central Valley, Climatology, Ecology, Suisun Marsh, All tags... USGS Science Data Catalog (SDC), Wildlife Biology, biota, birds, habitats, imageryBaseMapsEarthCover, surface water (non-marine), waterfowl, Fewer tags Central Valley Hydrologic Model version 2 (CVHM2): Well Log Database This data release provides updated borehole information to build upon and further refine a three-dimensional (3-D) texture model of valley-fill deposits in the Central Valley created by Faunt and others (2009). This model aids in understanding the aquifer system of the entire valley and will be later utilized in a groundwater flow model. The original database contained approximately 8,500 boreholes and with the addition of new data, the model now contains 14,683 boreholes. The new borehole lithologic data was sourced from the California Department of Water Resources (DWR) Online System of Well Completion Reports (OSWCR) and the California Central Valley Groundwater-Surface Water Simulation Model (C2VSim). This dataset... Categories: Data; Tags: California, Central Valley, groundwater, hydrogeology Phytoplankton Species Composition and Abundance in the Sacramento-San Joaquin River Delta: Microscopic Enumeration of USGS Samples, beginning in 2016 (ver. 1.1, December 2023) This dataset contains taxonomy, density (cells/mL), and biovolume (μm3/mL) data for phytoplankton sampled across the Sacramento San Joaquin River Delta and San Francisco Bay (Bay-Delta) beginning in 2016. Whole water phytoplankton samples were collected intermittently during special projects and during routine visits to service continuous monitoring stations. Samples were preserved with Lugol’s iodine solution (2-5 %) immediately after collection and stored in a cool, dark environment until analysis. Preserved whole water samples are sent to BSA Environmental Services (BSA) in Beachwood, Ohio for microscopic identification and enumeration. A Leica DMLB compound microscope is used for enumerating filtered phytoplankton... Categories: Data; Tags: Aquatic Biology, California, Central Valley, Ecology, Liberty Island, All tags... 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, high frequency, high-resolution, hydrogeology, inlandWaters, nutrient content (water), nutrients, phytoplankton, phytoplankton, public supply water use, statistical analysis, visualization methods, water quality, 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 Wetland Habitat Structure Maps for the Central Valley of California 2013-2017 We produced a time series of maps of habitat structure within wetlands of the Central Valley of California. The structure of open water and tall emergent vegetation, such as Typha spp. and Schoenoplectus spp., is critical for migratory birds. Through field observation and digitization of high resolution imagery we identified the locations of tall emergent vegetation, water, and other land cover. Using a random forest classification, we classified multispectral Landsat 8 imagery 2013-2017. We used images from the fall when most wetlands are flooded and the summer to separate trees and tall emergent vegetation. The final maps show the distribution and extent of tall emergent vegetation within wetlands. Final time... Tags: California, Central Valley, Central Valley of California, Ecology, Emergent Vegetation, All tags... Geography, LANDSAT, LANDSAT 8, Land Use Change, Landscape, Planet, Remote Sensing, Sacramento, San Joaquin, USGS Science Data Catalog (SDC), Wetlands, biota, birds, environment, habitats, image collections, migratory birds, multispectral imaging, remote sensing, satellite imagery, shore birds, wetland ecosystems, 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 Wetland Moist Soil Seed Maps for the Central Valley of California 2007-2017 We produced a series of maps of moist soil seed plants within managed wetlands in the Central Valley of California from 2007-2011 & 2013-2017. Moist soil seed plants, such as swamp timothy (Crypsis schoenoides) and watergrass (Echinochloa crusgallim), are a critical food source for migratory birds. Vegetation maps were created by classifying Landsat imagery from 2007-2011 and 2013-2017. A support vector machine learning classifier was trained using phenology metrics of moist soil seed plants, emergent vegetation, water, and other land cover observed via field surveys and high resolution imagery. Productivity maps of swamp timothy were based on a regression model of seed head weight with Landsat vegetation indices.... Tags: California, Central Valley, Ecology, Environmental Health, Geography, All tags... Information Sciences, Remote Sensing, Sacramento, San Joaquin, USGS Science Data Catalog (SDC), Water Resources, Wildlife Biology, biota, environment, habitats, image collections, multispectral imaging, remote sensing, wetland ecosystems, Fewer tags Wetland Moist Soil Seed Maps for the Central Valley of California 2007-2017: Training and Testing Data We produced a series of maps of moist soil seed plants within managed wetlands in the Central Valley of California from 2007-2011 & 2013-2017. Moist soil seed plants, such as swamp timothy (Crypsis schoenoides) and watergrass (Echinochloa crusgallim), are a critical food source for migratory waterfowl. Through field observation and digitization of high resolution imagery we identified the locations of moist soil seed plants, tall emergent vegetation, water, and other land cover. Using a Support Vector Machine classification, we classified multispectral Landsat imagery from 2007-2011 and 2013-2017. We used images from May through August to create phenology metrics. The final datasets were used to train and test the... Tags: California, Central Valley, Sacramento, San Joaquin, biota, All tags... environment, habitats, image collections, multispectral imaging, remote sensing, wetland ecosystems, 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 Wetland Moist Soil Seed Productivity Maps for the Central Valley of California 2007 - 2017 We produced a series of maps of moist soil seed plants within managed wetlands in the Central Valley of California from 2007-2011 & 2013-2017. Moist soil seed plants, such as swamp timothy (Crypsis schoenoides) and watergrass (Echinochloa crusgallim), are a critical food source for migratory birds. For each of the Moist Soil Seed maps from 2007 to 2017, we mapped productivity of swamp timothy where swamp timothy was mapped according to a multiple regression of the average log seed head weight per Landsat pixel to Landsat derived values for green chlorophyll index (NIR/green - 1), swir1 reflectance, red green simple ratio (red/green) and SSURGO derived percent clay (STprod). For areas mapped as watergrass, we mapped... Tags: California, Central Valley, Sacramento, San Joaquin, biota, All tags... environment, habitats, image collections, multispectral imaging, remote sensing, wetland ecosystems, Fewer tags 1 2 3 4 »