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Discrete sample surface-water data for the Sacramento-San Joaquin River Delta The goal of this study was to develop a suite of inter-related water quality monitoring approaches capable of modeling and estimating the spatial and temporal gradients of particulate and dissolved total mercury (THg) concentration, and particulate and dissolved methyl mercury (MeHg), concentration, in surface waters across the Sacramento / San Joaquin River Delta (SSJRD). This suite of monitoring approaches included: a) data collection at fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, b) spatial mapping using boat-mounted flow-through sensors, and c) satellite-based remote sensing. The focus of this specific Child Page is to present all field and laboratory-based data associated with... Categories: Data; Tags: Lower Sacramento, San Francisco Bay, San Joaquin Delta, chemical analysis, datasets, All tags... dissolved metals, environment, field monitoring stations, field sampling, laboratory methods, mercury, mercury analysis, nutrient content (water), oxygen content (water), real-time monitoring and reporting, surface water quality, suspended material (water), water chemistry, water column reflectivity, water pH, water properties, water quality, water sampling, water sampling, water temperature, Fewer tags Flow through system (FTS) and spectral absorption / attenuation sensor (ACS) data from boat mapping transects within the Sacramento-San Joaquin River Delta The goal of this study was to develop a suite of inter-related water quality monitoring approaches capable of modeling and estimating the spatial and temporal gradients of particulate and dissolved total mercury (THg) concentration and particulate and dissolved methyl mercury (MeHg) concentration in surface waters across the Sacramento / San Joaquin River Delta (SSJRD). This suite of monitoring approaches included: a) data collection at fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, b) spatial mapping using boat-mounted, flow-through, sensors and c) satellite-based remote sensing. The focus of this specific Child Page is to present all data collected during the underway boat mapping component... Categories: Data; Tags: California, Lower Sacramento, Sacramento, San Francisco Bay, San Joaquin Delta, All tags... Solano, Yolo, chemical analysis, dissolved organic compounds, environment, environmental proxies, field inventory and monitoring, field sampling, nutrient content (water), optical methods, oxygen content (water), real-time monitoring and reporting, salinity, surface water quality, suspended material (water), transect sampling, water chemistry, water column reflectivity, water pH, water properties, water sampling, water sampling, water temperature, Fewer tags High resolution and discrete temporal and spatial water-quality measurements in support of modeling mercury and methylmercury concentrations in surface waters of the Sacramento-San Joaquin River Delta The Sacramento / San Joaquin River Delta (SSJRD) is contaminated with legacy mercury (Hg) from historical mining and mineral processing activities throughout the watershed, as well as from contemporary atmospheric and industrial inputs. The current project was designed for the purpose of developing high-resolution spatial and temporal models for estimating concentrations of mercury species in surface waters of the SSJRD. The field component of the project brings together three high-resolution platforms for collecting water-quality data (fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, spatial mapping using boat-mounted flow-through sensors, and satellite-based remote sensing) coupled with... Categories: Data; Tags: California, Environmental Health, Geochemistry, Lower Sacramento, Remote Sensing, All tags... Sacramento, San Francisco Bay, San Joaquin Delta, Solano, USGS Science Data Catalog (SDC), Water Quality, Yolo, chemical analysis, environment, environmental proxies, field inventory and monitoring, field monitoring stations, field sampling, mercury, mercury analysis, mercury contamination, optical methods, remote sensing, suspended material (water), transect sampling, water chemistry, water column reflectivity, water properties, water sampling, water sampling, Fewer tags Shallow Sediment Geochemistry in a Mercury-Contaminated Multi-Habitat Floodplain: Cache Creek Settling Basin, Yolo County, California (version 2.0, August 2021) The Cache Creek Settling Basin (CCSB) is a 13.3 km2 leveed basin located at the terminal drainage of the Cache Creek watershed, immediately NE of the town of Woodland (Yolo County), California and approximately 18 km NW of Sacramento, California. The basin was constructed by the U.S. Army Corps of Engineers (completed in 1937 and modified in 1993) for the purpose of trapping suspended sediment transported from the upper Cache Creek watershed during high-flow events, thus preventing sediment from entering the Yolo Bypass, a larger downstream floodwater conveyance and agricultural zone. In addition to trapping suspended sediment, the CCSB also traps sediment-associated mercury (Hg), which is particularly elevated... Categories: Data Release - Revised; Tags: Cache Creek Settling Basin, Sacramento River Watershed, Sacramento–San Joaquin River Delta, Total Maximum Daily Load (TMDL), USGS Science Data Catalog (SDC), All tags... Woodland, CA, Yolo Bypass, Yolo County, aquatic ecosystems, basins, biogeochemistry, floodplains, mercury, methylmercury, watershed management, wetlands, Fewer tags High resolution temporal surface water data from four continuous monitoring stations within the Sacramento-San Joaquin River Delta The goal of this study was to develop a suite of inter-related water quality monitoring approaches capable of modeling and estimating the spatial and temporal gradients of particulate and dissolved total mercury (THg) concentration, and particulate and dissolved methyl mercury (MeHg), concentration, in surface waters across the Sacramento / San Joaquin River Delta (SSJRD). This suite of monitoring approaches included: a) data collection at fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, b) spatial mapping using boat-mounted flow-through sensors, and c) satellite-based remote sensing. The focus of this specific child page is to document the temporal high-resolution (15 minute) in-situ sensor... Categories: Data; Tags: California, San Joaquin Delta, environment, field monitoring stations, surface water (non-marine), All tags... surface water quality, time series datasets, water chemistry, water circulation, water pH, water properties, water quality, water sampling, water temperature, Fewer tags Shallow Sediment Geochemistry in a Mercury-Contaminated Multi-Habitat Floodplain: Cache Creek Settling Basin, Yolo County, California, 2010–17 Note: This data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P9MDXR3M. The Cache Creek Settling Basin (CCSB) is a 13.3 km2 leveed basin located at the terminal drainage of the Cache Creek watershed, immediately NE of the town of Woodland (Yolo County), California and approximately 18 km NW of Sacramento, California. The basin was constructed by the U.S. Army Corps of Engineers (completed in 1937 and modified in 1993) for the purpose of trapping suspended sediment transported from the upper Cache Creek watershed during high-flow events, thus preventing sediment from entering the Yolo Bypass, a larger downstream floodwater conveyance and agricultural zone. In addition to trapping... Tags: Cache Creek Settling Basin, Sacramento River Watershed, Sacramento–San Joaquin River Delta, Total Maximum Daily Load (TMDL), USGS Science Data Catalog (SDC), All tags... Woodland, CA, Yolo Bypass, Yolo County, aquatic ecosystems, basins, biogeochemistry, floodplains, mercury, methylmercury, watershed management, wetlands, Fewer tags Geochemical data for water, sediment, and biota in Lake Combie, California, 2017-2021 This dataset includes field measurements and laboratory analyses of surface water, bottom water (sediment-water interface), surficial (0-2 cm) sediment, pore water (0-2 cm), and biota collected in Lake Combie, California, from September 2017 through August 2021. The study area includes six sites within the reservoir where discrete samples of surface water, bottom water, sediment, and pore water were taken along the length of the reservoir at the following distances from the spillway: 0.07 miles, 0.5 miles, 0.9 miles, 1.2 miles, 1.3 miles, and 1.4 miles. The within-reservoir sites were sampled during September 2017, February 2018, and May 2018, prior to a large sediment removal operation, and again during September... Categories: Data; Tags: California, Geochemistry, Hydrology, Lake Combie, Limnology, All tags... USGS Science Data Catalog (SDC), Upper Bear, Water Quality, Zooplankton, bioaccumulation, biota, chemical analysis, dissolved metals, environment, field sampling, fish, geoscientificInformation, inlandWaters, mercury, mercury analysis, mercury contamination, methyl mercury, methylmercury, optical methods, reservoir, sediment analysis, suspended material (water), water chemistry, water properties, water quality, Fewer tags Spectral data for discrete surface water samples from the Sacramento-San Joaquin River Delta The goal of this study was to develop a suite of inter-related water quality monitoring approaches capable of modeling and estimating the spatial and temporal gradients of particulate and dissolved total mercury (THg) concentration, and particulate and dissolved methyl mercury (MeHg), concentration, in surface waters across the Sacramento / San Joaquin River Delta (SSJRD). This suite of monitoring approaches included: a) data collection at fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, b) spatial mapping using boat-mounted flow-through sensors, and c) satellite-based remote sensing. The focus of this specific Child Page is to present laboratory measured spectral data associated with discrete... Categories: Data; Tags: California, Lower Sacramento, Sacramento, San Francisco Bay, San Joaquin Delta, All tags... San Joaquin Delta, Solano, Yolo, chemical analysis, dissolved metals, environment, environmental proxies, field monitoring stations, field sampling, optical methods, suspended material (water), water chemistry, water column reflectivity, water properties, water sampling, water sampling, Fewer tags Surface-Water Geochemistry of Mercury, Methylmercury, Nutrients, and other Constituents in Clear Lake, Lake County, California, July 2019 Clear Lake is a 180 km2 freshwater lake located in the California Coast Range, approximately 120 km northwest of Sacramento. The lake supports a wide variety of fish and bird species and is a very popular sport-fishing destination. However, fish consumption advisories associated with mercury (Hg) contamination exist for several popular recreational species. The lake is comprised of three main regions including a large open-water region to the northwest (North Arm), a smaller and narrower region to the southeast (South Arm), and the smallest and narrowest region to the east (Oaks Arm). The Sulfur Bank Mercury Mine (SBMM), located on the south shore of the Oaks Arm, was mined by both open-pit and underground methods... Categories: Data; Tags: Aquatic Biology, Clear Lake, Ecology, Environmental Health, Geochemistry, All tags... Lake County, CA, USGS Science Data Catalog (SDC), Water Quality, Water Resources, Wildlife Biology, aquatic ecosystems, bioaccumulation, biogeochemistry, biota, ecosystem management, mercury, methylmercury, wetlands, Fewer tags