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Filters Date Range Past year (6) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (1) OGC WFS Layer (1) OGC WMS Layer (1) OGC WMS Service (1) Contacts Jacob A Fleck Shaun M Baesman U.S. Geological Survey U.S. Geological Survey - ScienceBase Brian Bergamaschi More... Categories Data (6) Tag Types Theme (7) Tags (with Scheme=ISO 19115 Topic Category) environment (6) biota (1) View Results as: JSON ATOM CSV

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 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 Tidal hydrologic and constitutent loads from First Mallard Water Quality Station in the Rush Ranch Marsh Complex of the San Francisco Bay Estuarine Research Reserve (SFBNERR) 2016-2018 The data herein report continuous field measurements and specific discrete sampling events associated with water quality and carbon consitutents – both dissolved and particulate forms. These data were coupled with atmospheric flux measurements during the 2017-18 water year to estimate the net storage of fixed carbon within the marsh on an areal basis. Direct and indirect measurement showed 47 to 59% of fixed carbon is stored on site, and most loss is through dissolved inorganic carbon (DIC) export. Comparing this with other tidal wetlands in the U.S. showed similar rates of loss, and a global meta-analysis showed that lateral loss is a proportionally larger term in coastal wetland carbon budgets, relative to other... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, USGS Science Data Catalog (SDC), Water Resources, atmospheric properties, carbon cycling, All tags... environment, wetlands, 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 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 Harmonizing wetland soil organic carbon datasets to improve spatial representation of 2011 soil carbon stocks in the conterminous United States These datasets represent a revised national scale estimate of wetland soil carbon stock assessments by improving representation of soil organic carbon densities. This assessment is based on a three-step approach to harmonize survey and point-based data for predicting soil organic carbon density from percent organic carbon alone (or percent organic matter, with conversion), when reliable dry bulk density information is not available. Given issues with survey-level extrapolation of soil pedons into discontinuous hydric soils, quantile, segmented data analysis provides a more accurate spatially explicit soil organic carbon density product. These modeled data leverage spatial and statistical distributions of soil organic... Tags: CONUS, Soil Sciences, USGS Science Data Catalog (SDC), biota, bulk density, All tags... hydric soil, inland, soil chemistry, soil horizons, soil organic carbon, tidal, wetland, 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