Hydrologic technicians deploying a flow sensor on a shoal in San Francisco Bay to investigate phytoplankton production and nutrient transformations.
A view from the office: USGS scientists heading out to deploy sensors for sediment nutrient storage and release in Rodeo Lagoon.
USGS laboratory technician filtering for chlorophyll-a.
Scientists aboard research vessel Aiken conduct water-quality mapping in support of wastewater-derived nutrients project.
The Biogeochemistry (BGC) Group uses an interdisciplinary approach to address surface water quality issues and food web dynamics throughout California, particularly in the Sacramento-San Joaquin Delta and San Francisco Bay.
Study areas include:
- Drivers of phytoplankton community composition and abundance and harmful algal bloom-related toxins
- Long-term continuous monitoring of numerous water quality constituents, phytoplankton, phytoplankton community structure, dissolved organic carbon and nitrogen as well as other constituents important to aquatic systems
- Changes in wastewater-derived nutrients and effects on phytoplankton community structure
- Effects of flow and water residence time on nutrient cycling and phytoplankton
- The impacts of invasive aquatic vegetation on water quality, water residence time, and native phytoplankton
- Assessing the role of wetlands in the Delta with respect to such topics as mercury, nutrients, drinking water quality and phytoplankton production
- Assessing the potential of tidal wetlands to mitigate land subsidence and sequester carbon
- Supporting improved water quality management through development of new sensors, analyses and techniques such as direct residence time measurements, custom sensor technologies, wide-area high-speed mapping surveys, remote sensing calibration and validation and other related activities
The BGC Group specializes in the application of in-situ optical sensors that monitor short- and long-term water quality trends. These sensors measure a host of biogeochemical parameters and capture continuous temporal trends – including those that may go undetected through traditional discrete sampling. The BGC Group also employs novel high-resolution boat-based mapping surveys, conducting intensive sampling for a diverse variety of biogeochemical parameters throughout the Bay-Delta.
These studies and data will help resource managers assess response to management actions and predict how the Bay-Delta will respond to future changes. The high frequency, real-time data can act as an early warning system for unanticipated, short-lived, or rapidly changing conditions, such as those due to spills, harmful algal blooms, and altered water-quality resulting from storms or levee breaches. The BGC group additionally specialize in the creation of novel data dissemination techniques in effort to ease open data acquisition, ultimately aiming to advance Bay-Delta science.
Additional Biogeochemistry Group staff include:
- Malanyon Adams
- Dulci Avouris
- Tom Bergamaschi
- Tim Baxter
- Heidi Bockisch
- Bryan Bonham
- Jake Brinkman
- Dylan Burau
- Jordy Conneely
- Ayelet Delascagigas
- Patrick Dellwo
- Nicholas Framsted
- Tommy (Hieu) Ly
- Andrea Jaegge
- Nathan Jumps
- Colin Keating
- Anne Le
- Ariana Maestas
- Kat Mai Cone
- Schuyler Nardelli
- Erica Nejad
- Diana Oros
- Emily Richardson
- Tara Schraga
- Jesse Schroeder
- Jennifer Soto-Perez
- Corrine Sanford
- Crystal Sturgeon
- Maura Uebner
Below are other science projects associated with this project.
Nitrogen Dynamics Along the Sacramento River and Links to Phytoplankton Dynamics: Resolving Spatial and Temporal Variability Using In-Situ, High-Frequency Measurements and Other Tools
Interactions Between Physical Processes and Suspended Sediment Quality in Relation to Spawning Migrations of Delta Smelt
Causes and Relevance of Phytoplankton Blooms in the Northern Sacramento-San Joaquin Delta
Low Intensity Chemical Dosing (LICD)
Effects of Aquatic Vegetation on Water Quality and Residence Time in the Bay-Delta
Transport of dissolved organic matter by river networks from mountains to the sea: a re-examination of the role of flow across temporal and spatial scales
Below are multimedia items associated with this project.
Below are publications associated with this project.
Potential for negative emissions of greenhouse gases (CO2, CH4 and N2O) through coastal peatland re-establishment: Novel insights from high frequency flux data at meter and kilometer scales
Using paired in situ high frequency nitrate measurements to better understand controls on nitrate concentrations and estimate nitrification rates in a wastewater-impacted river
Irrigation as a fuel pump to freshwater ecosystems
An introduction to high-frequency nutrient and biogeochemical monitoring for the Sacramento–San Joaquin Delta, northern California
Synthesis of data from high-frequency nutrient and associated biogeochemical monitoring for the Sacramento–San Joaquin Delta, northern California
Clearing the waters: Evaluating the need for site-specific field fluorescence corrections based on turbidity measurements
A river-scale Lagrangian experiment examining controls on phytoplankton dynamics in the presence and absence of treated wastewater effluent high in ammonium
Effects of solid-liquid separation and storage on monensin attenuation in dairy waste management systems
Using continuous underway isotope measurements to map water residence time in hydrodynamically complex tidal environments
Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model
Assessing wildlife benefits and carbon storage from restored and natural coastal marshes in the Nisqually River Delta: Determining marsh net ecosystem carbon balance
Optical properties of dissolved organic matter (DOM): Effects of biological and photolytic degradation
Below are data or web applications associated with this project.
Below are news stories associated with this project.
Below are partners associated with this project.
The Biogeochemistry (BGC) Group uses an interdisciplinary approach to address surface water quality issues and food web dynamics throughout California, particularly in the Sacramento-San Joaquin Delta and San Francisco Bay.
Study areas include:
- Drivers of phytoplankton community composition and abundance and harmful algal bloom-related toxins
- Long-term continuous monitoring of numerous water quality constituents, phytoplankton, phytoplankton community structure, dissolved organic carbon and nitrogen as well as other constituents important to aquatic systems
- Changes in wastewater-derived nutrients and effects on phytoplankton community structure
- Effects of flow and water residence time on nutrient cycling and phytoplankton
- The impacts of invasive aquatic vegetation on water quality, water residence time, and native phytoplankton
- Assessing the role of wetlands in the Delta with respect to such topics as mercury, nutrients, drinking water quality and phytoplankton production
- Assessing the potential of tidal wetlands to mitigate land subsidence and sequester carbon
- Supporting improved water quality management through development of new sensors, analyses and techniques such as direct residence time measurements, custom sensor technologies, wide-area high-speed mapping surveys, remote sensing calibration and validation and other related activities
The BGC Group specializes in the application of in-situ optical sensors that monitor short- and long-term water quality trends. These sensors measure a host of biogeochemical parameters and capture continuous temporal trends – including those that may go undetected through traditional discrete sampling. The BGC Group also employs novel high-resolution boat-based mapping surveys, conducting intensive sampling for a diverse variety of biogeochemical parameters throughout the Bay-Delta.
These studies and data will help resource managers assess response to management actions and predict how the Bay-Delta will respond to future changes. The high frequency, real-time data can act as an early warning system for unanticipated, short-lived, or rapidly changing conditions, such as those due to spills, harmful algal blooms, and altered water-quality resulting from storms or levee breaches. The BGC group additionally specialize in the creation of novel data dissemination techniques in effort to ease open data acquisition, ultimately aiming to advance Bay-Delta science.
Additional Biogeochemistry Group staff include:
- Malanyon Adams
- Dulci Avouris
- Tom Bergamaschi
- Tim Baxter
- Heidi Bockisch
- Bryan Bonham
- Jake Brinkman
- Dylan Burau
- Jordy Conneely
- Ayelet Delascagigas
- Patrick Dellwo
- Nicholas Framsted
- Tommy (Hieu) Ly
- Andrea Jaegge
- Nathan Jumps
- Colin Keating
- Anne Le
- Ariana Maestas
- Kat Mai Cone
- Schuyler Nardelli
- Erica Nejad
- Diana Oros
- Emily Richardson
- Tara Schraga
- Jesse Schroeder
- Jennifer Soto-Perez
- Corrine Sanford
- Crystal Sturgeon
- Maura Uebner
Below are other science projects associated with this project.
Nitrogen Dynamics Along the Sacramento River and Links to Phytoplankton Dynamics: Resolving Spatial and Temporal Variability Using In-Situ, High-Frequency Measurements and Other Tools
Interactions Between Physical Processes and Suspended Sediment Quality in Relation to Spawning Migrations of Delta Smelt
Causes and Relevance of Phytoplankton Blooms in the Northern Sacramento-San Joaquin Delta
Low Intensity Chemical Dosing (LICD)
Effects of Aquatic Vegetation on Water Quality and Residence Time in the Bay-Delta
Transport of dissolved organic matter by river networks from mountains to the sea: a re-examination of the role of flow across temporal and spatial scales
Below are multimedia items associated with this project.
Below are publications associated with this project.
Potential for negative emissions of greenhouse gases (CO2, CH4 and N2O) through coastal peatland re-establishment: Novel insights from high frequency flux data at meter and kilometer scales
Using paired in situ high frequency nitrate measurements to better understand controls on nitrate concentrations and estimate nitrification rates in a wastewater-impacted river
Irrigation as a fuel pump to freshwater ecosystems
An introduction to high-frequency nutrient and biogeochemical monitoring for the Sacramento–San Joaquin Delta, northern California
Synthesis of data from high-frequency nutrient and associated biogeochemical monitoring for the Sacramento–San Joaquin Delta, northern California
Clearing the waters: Evaluating the need for site-specific field fluorescence corrections based on turbidity measurements
A river-scale Lagrangian experiment examining controls on phytoplankton dynamics in the presence and absence of treated wastewater effluent high in ammonium
Effects of solid-liquid separation and storage on monensin attenuation in dairy waste management systems
Using continuous underway isotope measurements to map water residence time in hydrodynamically complex tidal environments
Forecasting tidal marsh elevation and habitat change through fusion of Earth observations and a process model
Assessing wildlife benefits and carbon storage from restored and natural coastal marshes in the Nisqually River Delta: Determining marsh net ecosystem carbon balance
Optical properties of dissolved organic matter (DOM): Effects of biological and photolytic degradation
Below are data or web applications associated with this project.
Below are news stories associated with this project.
Below are partners associated with this project.