Next Generation Water Observing System (NGWOS)
Trinity-San Jacinto River Basin selected as 5th Integrated Water Science Basin
Studies in this Texas basin will focus on the impacts of climate change and sea level variability in urban envirnoments
Willamette River Basin selected as 4th Integrated Water Science Basin
Studies in this Pacific Northwest basin will advance the science used to manage water for the diverse needs of major cities, fertile agriculture, and ecologically important species
How We Model Stream Temperature in the Delaware River Basin
New data visualization explores neural networks, and how the USGS uses them to make physically-realistic predictions with less data
From Snow to Flow
What changing snowmelt means for water availability in the western U.S.
NGWOS Illinois River Basin briefing sheet now available
IRB efforts will focus on nutrients, sediment, harmful algal blooms, water availability, urban flooding, and emerging contaminants
Balancing water availability and quality in the Delaware River Basin
How new USGS science and monitoring can inform water management
The Next Generation Water Observing System (NGWOS) supports water availability assessments, management, and prediction by enhancing water observations in basins that represent major U.S. hydrologic regions. NGWOS provides high-resolution, real-time data on water quantity, quality, and use, as well as advance the development and application of new sensor technologies and remote sensing methods.
Every day, data from the U.S. Geological Survey (USGS) water observing systems drive forecasts of floods and droughts, guide management of reservoirs for water supply and power generation, and inform water management decisions that underpin the prosperity of the Nation. These data have formed the backbone of national observations on current conditions and trends in water quantity and quality for more than a century.
Recognizing that more water observations can support a more resilient water future, Congress provided funding to USGS in Fiscal Year (FY) 2019 to begin piloting a Next Generation Water Observing System (NGWOS). The NGWOS is planned to be piloted in up to 10 medium-sized (~15,000–25,000 square mile) reference basins, each representative of a larger region with similar hydrologic characteristics. The NGWOS is enhancing and expanding USGS observations within these basins using new monitoring stations, new sensors, and other technologies that fill critical information gaps.
To date, NGWOS has begun in five basins, each with a particular regional focus:
- Delaware River Basin (2019): Identify drivers of increasing surface and groundwater salinity and quantify how they affect past, present, and future water availability;
- Upper Colorado River Basin (2020): Provide insight into how past, present, and future snow conditions impact water supply and the ability to meet demand;
- Illinois River Basin (2021): Improve understanding of nutrients and HABs and their potential to limit past, present, and future water availability;
- Willamette River Basin (2022, partial funding): Advance understanding of how past, present, and future streamflow and water temperature conditions affect human use and the amount of suitable habitat for spring Chinook salmon;
- Trinity-San Jacinto River Basin (2023, partial funding): Identify drivers and improve understanding of past, present, and future urban flooding to predict and manage change impacts on water security.
Emerging and Innovative Technologies
Research and Development (R&D) efforts are critical to the evolution of USGS water monitoring networks. The NGWOS serves as the primary program where new and innovative techniques, methods and instrumentation for water monitoring are developed and matured. This includes 1) the development of prototypes and products that are sufficiently matured such that they can be transitioned to our national network operations to improve efficiency, accuracy and temporal- scales of data collection, and 2) derive operational techniques and methodologies for the next generation of environmental monitoring sensors, systems and monitoring location infrastructure.
Many of the technologies and methods NGWOS is developing is in partnership with universities and industry as directed by Congress. Focus areas have included satellite remote sensing observations for water quantity and quality; non-contact methods for measuring water stage and velocity; and the development of low cost, autonomous vehicles for water monitoring. These strategic investments with U.S. partners are advancing our cutting-edge water monitoring networks and driving technological innovations.
Water Data Management and Delivery
The NGWOS is modernizing the National Water Information System (NWIS) cyberinfrastructure to accommodate new data and sensor networks, displaying observational uncertainty, and improving the efficiency of data transmission and network operations. NGWOS is also building new ways to access information such as the Hydrologic Imagery Visualization and Information System (HIVIS), which provides real-time camera imagery from over 800 USGS streamgages nationwide. Ongoing NGWOS investments will drive further modernization of the cyberinfrastructure and web-based data analysis and visualization tools to maximize access and societal benefits.
Below are other science projects associated with NGWOS.
Hydroacoustics
Data Science for Water Resources
Surge, Wave, and Tide Hydrodynamics (SWaTH) Network
Sediment Acoustics
Thermal Imaging Cameras for Studying Groundwater/Surface-Water Exchange
Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies
Flood Inundation Mapping Science
Autonomous Underwater Vehicles (AUV)
Below are data or web applications associated with NGWOS.
Laboratory-based optical measurements for surface water samples collected within the Fraser River in the Upper Colorado River Basin from September 2021 through September 2023 Laboratory-based optical measurements for surface water samples collected within the Fraser River in the Upper Colorado River Basin from September 2021 through September 2023
Maps of water depth derived from satellite images of selected reaches of the American, Colorado, and Potomac Rivers acquired in 2020 and 2021 (ver. 2.0, September 2024) Maps of water depth derived from satellite images of selected reaches of the American, Colorado, and Potomac Rivers acquired in 2020 and 2021 (ver. 2.0, September 2024)
Dissolved noble gas data and helium mass balance models for the Colorado and Virgin Rivers Dissolved noble gas data and helium mass balance models for the Colorado and Virgin Rivers
Laboratory Optical Measurements From Discrete Surface Water Samples Collected During Water Quality Mapping Campaigns on the Illinois Waterway and Chicago Area Waterway Systems Laboratory Optical Measurements From Discrete Surface Water Samples Collected During Water Quality Mapping Campaigns on the Illinois Waterway and Chicago Area Waterway Systems
Remotely sensed data acquired from an Uncrewed Aerial System (UAS) and field measurements of flow depth and velocity from the North Santiam River, Oregon, collected in July 2022 Remotely sensed data acquired from an Uncrewed Aerial System (UAS) and field measurements of flow depth and velocity from the North Santiam River, Oregon, collected in July 2022
Paired Air and Water Temperature Data for Two Watersheds in the Delaware River Basin Paired Air and Water Temperature Data for Two Watersheds in the Delaware River Basin
Site visit cross section surveys and multispectral image data from gaging stations throughout the Willamette and Delaware River Basins from 2022 and code for Bathymetric Mapping using Gage Records and Image Databases (BaMGRID) Site visit cross section surveys and multispectral image data from gaging stations throughout the Willamette and Delaware River Basins from 2022 and code for Bathymetric Mapping using Gage Records and Image Databases (BaMGRID)
Airborne electromagnetic and magnetic survey of Delaware Bay and surrounding regions of New Jersey and Delaware, 2022 (ver 2.0, April 2025) Airborne electromagnetic and magnetic survey of Delaware Bay and surrounding regions of New Jersey and Delaware, 2022 (ver 2.0, April 2025)
Helicopter-based videos and orthomosaic maps produced for Integrated Water Science basin riverine study sites, 2022 Helicopter-based videos and orthomosaic maps produced for Integrated Water Science basin riverine study sites, 2022
Video acquired from an Uncrewed Aerial System, UAS, and hydroacoustic measurements of flow velocity obtained along the North Santiam River, Oregon, in July 2022 Video acquired from an Uncrewed Aerial System, UAS, and hydroacoustic measurements of flow velocity obtained along the North Santiam River, Oregon, in July 2022
Fluorescence sensor measurements in sediment suspensions to evaluate turbidity corrections Fluorescence sensor measurements in sediment suspensions to evaluate turbidity corrections
Remotely sensed data from a reach of the Sacramento River near Glenn, California, used to perform Particle Image Velocimetry (PIV) within the Robot Operating System (ROS) Remotely sensed data from a reach of the Sacramento River near Glenn, California, used to perform Particle Image Velocimetry (PIV) within the Robot Operating System (ROS)
Below are multimedia items associated with NGWOS.
Next Generation Water Observing System Conceptual Diagram
Conceptual illustration showing how USGS's Next Generation Water Observing System will enhance the spatial and temporal monitoring of water within reference basins and larger hydrologic regions in all U.S. states and territories.
Below are publications associated with NGWOS.
Water priorities for the nation—The U.S. Geological Survey next generation water observing system Water priorities for the nation—The U.S. Geological Survey next generation water observing system
Bedrock depth influences spatial patterns of summer baseflow, temperature and flow disconnection for mountainous headwater streams Bedrock depth influences spatial patterns of summer baseflow, temperature and flow disconnection for mountainous headwater streams
Spectral mixture analysis for surveillance of harmful algal blooms (SMASH): A field-, laboratory-, and satellite-based approach to identifying cyanobacteria genera from remotely sensed data Spectral mixture analysis for surveillance of harmful algal blooms (SMASH): A field-, laboratory-, and satellite-based approach to identifying cyanobacteria genera from remotely sensed data
Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river
Mapping benthic algae and cyanobacteria in river channels from aerial photographs and satellite images: A proof-of-concept investigation on the Buffalo National River, AR, USA Mapping benthic algae and cyanobacteria in river channels from aerial photographs and satellite images: A proof-of-concept investigation on the Buffalo National River, AR, USA
Exploring local riverbank sediment controls on the occurrence of preferential groundwater discharge points Exploring local riverbank sediment controls on the occurrence of preferential groundwater discharge points
Water priorities for the Nation—USGS Integrated Water Science basins Water priorities for the Nation—USGS Integrated Water Science basins
Surface flow velocities from space: Particle image velocimetry of satellite video of a large, sediment-laden river Surface flow velocities from space: Particle image velocimetry of satellite video of a large, sediment-laden river
Improving remotely sensed river bathymetry by image-averaging Improving remotely sensed river bathymetry by image-averaging
Small atoll fresh groundwater lenses respond to a combination of natural climatic cycles and human modified geology Small atoll fresh groundwater lenses respond to a combination of natural climatic cycles and human modified geology
Water priorities for the Nation—U.S. Geological Survey Integrated Water Availability Assessments Water priorities for the Nation—U.S. Geological Survey Integrated Water Availability Assessments
sUAS-based remote sensing of river discharge using thermal particle image velocimetry and bathymetric lidar sUAS-based remote sensing of river discharge using thermal particle image velocimetry and bathymetric lidar
Below are data or web applications associated with NGWOS.
Below are software associated with NGWOS.
The Next Generation Water Observing System (NGWOS) supports water availability assessments, management, and prediction by enhancing water observations in basins that represent major U.S. hydrologic regions. NGWOS provides high-resolution, real-time data on water quantity, quality, and use, as well as advance the development and application of new sensor technologies and remote sensing methods.
Every day, data from the U.S. Geological Survey (USGS) water observing systems drive forecasts of floods and droughts, guide management of reservoirs for water supply and power generation, and inform water management decisions that underpin the prosperity of the Nation. These data have formed the backbone of national observations on current conditions and trends in water quantity and quality for more than a century.
Recognizing that more water observations can support a more resilient water future, Congress provided funding to USGS in Fiscal Year (FY) 2019 to begin piloting a Next Generation Water Observing System (NGWOS). The NGWOS is planned to be piloted in up to 10 medium-sized (~15,000–25,000 square mile) reference basins, each representative of a larger region with similar hydrologic characteristics. The NGWOS is enhancing and expanding USGS observations within these basins using new monitoring stations, new sensors, and other technologies that fill critical information gaps.
To date, NGWOS has begun in five basins, each with a particular regional focus:
- Delaware River Basin (2019): Identify drivers of increasing surface and groundwater salinity and quantify how they affect past, present, and future water availability;
- Upper Colorado River Basin (2020): Provide insight into how past, present, and future snow conditions impact water supply and the ability to meet demand;
- Illinois River Basin (2021): Improve understanding of nutrients and HABs and their potential to limit past, present, and future water availability;
- Willamette River Basin (2022, partial funding): Advance understanding of how past, present, and future streamflow and water temperature conditions affect human use and the amount of suitable habitat for spring Chinook salmon;
- Trinity-San Jacinto River Basin (2023, partial funding): Identify drivers and improve understanding of past, present, and future urban flooding to predict and manage change impacts on water security.
Emerging and Innovative Technologies
Research and Development (R&D) efforts are critical to the evolution of USGS water monitoring networks. The NGWOS serves as the primary program where new and innovative techniques, methods and instrumentation for water monitoring are developed and matured. This includes 1) the development of prototypes and products that are sufficiently matured such that they can be transitioned to our national network operations to improve efficiency, accuracy and temporal- scales of data collection, and 2) derive operational techniques and methodologies for the next generation of environmental monitoring sensors, systems and monitoring location infrastructure.
Many of the technologies and methods NGWOS is developing is in partnership with universities and industry as directed by Congress. Focus areas have included satellite remote sensing observations for water quantity and quality; non-contact methods for measuring water stage and velocity; and the development of low cost, autonomous vehicles for water monitoring. These strategic investments with U.S. partners are advancing our cutting-edge water monitoring networks and driving technological innovations.
Water Data Management and Delivery
The NGWOS is modernizing the National Water Information System (NWIS) cyberinfrastructure to accommodate new data and sensor networks, displaying observational uncertainty, and improving the efficiency of data transmission and network operations. NGWOS is also building new ways to access information such as the Hydrologic Imagery Visualization and Information System (HIVIS), which provides real-time camera imagery from over 800 USGS streamgages nationwide. Ongoing NGWOS investments will drive further modernization of the cyberinfrastructure and web-based data analysis and visualization tools to maximize access and societal benefits.
Below are other science projects associated with NGWOS.
Hydroacoustics
Data Science for Water Resources
Surge, Wave, and Tide Hydrodynamics (SWaTH) Network
Sediment Acoustics
Thermal Imaging Cameras for Studying Groundwater/Surface-Water Exchange
Fiber-Optic Distributed Temperature Sensing Technology for Surface-Water and Groundwater Studies
Flood Inundation Mapping Science
Autonomous Underwater Vehicles (AUV)
Below are data or web applications associated with NGWOS.
Laboratory-based optical measurements for surface water samples collected within the Fraser River in the Upper Colorado River Basin from September 2021 through September 2023 Laboratory-based optical measurements for surface water samples collected within the Fraser River in the Upper Colorado River Basin from September 2021 through September 2023
Maps of water depth derived from satellite images of selected reaches of the American, Colorado, and Potomac Rivers acquired in 2020 and 2021 (ver. 2.0, September 2024) Maps of water depth derived from satellite images of selected reaches of the American, Colorado, and Potomac Rivers acquired in 2020 and 2021 (ver. 2.0, September 2024)
Dissolved noble gas data and helium mass balance models for the Colorado and Virgin Rivers Dissolved noble gas data and helium mass balance models for the Colorado and Virgin Rivers
Laboratory Optical Measurements From Discrete Surface Water Samples Collected During Water Quality Mapping Campaigns on the Illinois Waterway and Chicago Area Waterway Systems Laboratory Optical Measurements From Discrete Surface Water Samples Collected During Water Quality Mapping Campaigns on the Illinois Waterway and Chicago Area Waterway Systems
Remotely sensed data acquired from an Uncrewed Aerial System (UAS) and field measurements of flow depth and velocity from the North Santiam River, Oregon, collected in July 2022 Remotely sensed data acquired from an Uncrewed Aerial System (UAS) and field measurements of flow depth and velocity from the North Santiam River, Oregon, collected in July 2022
Paired Air and Water Temperature Data for Two Watersheds in the Delaware River Basin Paired Air and Water Temperature Data for Two Watersheds in the Delaware River Basin
Site visit cross section surveys and multispectral image data from gaging stations throughout the Willamette and Delaware River Basins from 2022 and code for Bathymetric Mapping using Gage Records and Image Databases (BaMGRID) Site visit cross section surveys and multispectral image data from gaging stations throughout the Willamette and Delaware River Basins from 2022 and code for Bathymetric Mapping using Gage Records and Image Databases (BaMGRID)
Airborne electromagnetic and magnetic survey of Delaware Bay and surrounding regions of New Jersey and Delaware, 2022 (ver 2.0, April 2025) Airborne electromagnetic and magnetic survey of Delaware Bay and surrounding regions of New Jersey and Delaware, 2022 (ver 2.0, April 2025)
Helicopter-based videos and orthomosaic maps produced for Integrated Water Science basin riverine study sites, 2022 Helicopter-based videos and orthomosaic maps produced for Integrated Water Science basin riverine study sites, 2022
Video acquired from an Uncrewed Aerial System, UAS, and hydroacoustic measurements of flow velocity obtained along the North Santiam River, Oregon, in July 2022 Video acquired from an Uncrewed Aerial System, UAS, and hydroacoustic measurements of flow velocity obtained along the North Santiam River, Oregon, in July 2022
Fluorescence sensor measurements in sediment suspensions to evaluate turbidity corrections Fluorescence sensor measurements in sediment suspensions to evaluate turbidity corrections
Remotely sensed data from a reach of the Sacramento River near Glenn, California, used to perform Particle Image Velocimetry (PIV) within the Robot Operating System (ROS) Remotely sensed data from a reach of the Sacramento River near Glenn, California, used to perform Particle Image Velocimetry (PIV) within the Robot Operating System (ROS)
Below are multimedia items associated with NGWOS.
Next Generation Water Observing System Conceptual Diagram
Conceptual illustration showing how USGS's Next Generation Water Observing System will enhance the spatial and temporal monitoring of water within reference basins and larger hydrologic regions in all U.S. states and territories.
Below are publications associated with NGWOS.
Water priorities for the nation—The U.S. Geological Survey next generation water observing system Water priorities for the nation—The U.S. Geological Survey next generation water observing system
Bedrock depth influences spatial patterns of summer baseflow, temperature and flow disconnection for mountainous headwater streams Bedrock depth influences spatial patterns of summer baseflow, temperature and flow disconnection for mountainous headwater streams
Spectral mixture analysis for surveillance of harmful algal blooms (SMASH): A field-, laboratory-, and satellite-based approach to identifying cyanobacteria genera from remotely sensed data Spectral mixture analysis for surveillance of harmful algal blooms (SMASH): A field-, laboratory-, and satellite-based approach to identifying cyanobacteria genera from remotely sensed data
Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river Remote sensing of visible dye concentrations during a tracer experiment on a large, turbid river
Mapping benthic algae and cyanobacteria in river channels from aerial photographs and satellite images: A proof-of-concept investigation on the Buffalo National River, AR, USA Mapping benthic algae and cyanobacteria in river channels from aerial photographs and satellite images: A proof-of-concept investigation on the Buffalo National River, AR, USA
Exploring local riverbank sediment controls on the occurrence of preferential groundwater discharge points Exploring local riverbank sediment controls on the occurrence of preferential groundwater discharge points
Water priorities for the Nation—USGS Integrated Water Science basins Water priorities for the Nation—USGS Integrated Water Science basins
Surface flow velocities from space: Particle image velocimetry of satellite video of a large, sediment-laden river Surface flow velocities from space: Particle image velocimetry of satellite video of a large, sediment-laden river
Improving remotely sensed river bathymetry by image-averaging Improving remotely sensed river bathymetry by image-averaging
Small atoll fresh groundwater lenses respond to a combination of natural climatic cycles and human modified geology Small atoll fresh groundwater lenses respond to a combination of natural climatic cycles and human modified geology
Water priorities for the Nation—U.S. Geological Survey Integrated Water Availability Assessments Water priorities for the Nation—U.S. Geological Survey Integrated Water Availability Assessments
sUAS-based remote sensing of river discharge using thermal particle image velocimetry and bathymetric lidar sUAS-based remote sensing of river discharge using thermal particle image velocimetry and bathymetric lidar
Below are data or web applications associated with NGWOS.
Below are software associated with NGWOS.
