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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
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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
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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
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Optical sensors measuring fluorescence of non-biological sources (e.g., dissolved organic matter, wastewater, hydrocarbons, fluorescent dyes, etc.; hereafter referred to as fDOM) are increasingly used in water quality studies because they provide proxy measurements for a variety of contaminants and constituents of concern including metals, wastewater effluent, and DOM (measured in the lab as dissolved organic carbon, (DOC)) concentrations. Similarly, sensors measuring biological (algal) fluorescence (hereafter referred to as chlorophyll (fChl) and phycocyanin (fPC), have gained popularity to measure phytoplankton concentration, biomass, and even primary productivity. As additional sensors are coupled with ongoing...
Categories: Data,
Data Release - Revised;
Tags: California,
California Water Science Center,
EXO YSI,
Organic Matter Research Laboratory,
Sacramento, All tags...
USGS Science Data Catalog (SDC),
Water Quality,
continuous monitoring,
environment,
fChl,
fDOM,
fPC,
fluorescence,
high frequency,
optical sensor,
organic matter,
standard solution,
water quality, Fewer tags
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Note: this data release has been superseded by version 2.0, available here: https://doi.org/10.5066/P91LJNAU Optical sensors measuring fluorescent dissolved organic matter (fDOM) are increasingly being used in water quality studies because they provide proxy measurements for dissolved organic matter concentrations (DOC). Similarly, chlorophyll-a (chl-a) fluorescence sensors have gained popularity as a means to measure phytoplankton concentration, biomass, and even primary productivity using various approaches. As additional sensors are grouped for in situ monitoring, field calibration checks are becoming quite time consuming for even the basic set of sensors (i.e. pH, specific conductivity, turbidity) that require...
Categories: Data;
Tags: California,
California Water Science Center,
EXO YSI,
Organic Matter Research Laboratory,
Sacramento, All tags...
USGS Science Data Catalog (SDC),
Water Quality,
continuous monitoring,
environment,
fChl,
fDOM,
fluorescence,
high frequency,
optical sensor,
organic matter,
standard solution,
water quality, Fewer tags
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