A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
Progress Through Partnerships - Chesapeake Bay Vertical Land Motion Project
Sometimes science takes a village
Our work in the Chesapeake Bay would not be possible if not for the help of our partners from across the scientific community.
Chesapeake Bay region has the highest rate of relative sea-level rise on the Atlantic Coast of the United States, and data indicate that vertical land motion in the form of subsidence has been responsible for more than half the relative sea-level rise measured in the Chesapeake Bay region.
The Chesapeake Bay Vertical Land Motion Project is a cooperative effort between the USGS and our many partners to document and study this problem. Scientists from federal agencies, state government, and academic institutions across the Chesapeake Bay region are all working together to better understand and measure land subsidence, sea level rise, and shoreline retreat. The USGS recognizes and applauds every project member that works to make this research possible.
Research Partner Spotlight - Virginia Tech

Virginia Tech is a key partner in the Chesapeake Bay Vertical Land Motion Project. Professors and students at the Geodesy and Tectonophysics Laboratory process, verify, quality check, and archive all of the data collected through this project. Their research, interpretation, and numerical modeling continues to be invaluable to our shared efforts.
Partner Spotlight - National Geodetic Survey

Our partners at the National Geodetic Survey (NGS) contribute substantially to our efforts to understand land motion in the Chesapeake Bay. In addition to helping with project design, project management, and organizing field campaigns, our NGS partners also provide their expertise and equipment to our team along with training for our scientists and field techs.
Access our Datasets
All of the data collected by the Chesapeake Bay Vertical Land Motion Project is open access and archived through the National Science Foundation (NSF) Geodetic Facility for the Advancement of Geosciences (GAGE) operated by the University NAVSTAR Consortium (UNAVCO). Follow the links below to request access to our datasets.
- 2019 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2020 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2021 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2022 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2023 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
Lead Researchers
Each of these scientists has played a key leadership role in the Chesapeake Bay Vertical Land Motion Project.
Jim Duda - USGS Virginia and West Virginia Water Sciences Center
Joel Carr - USGS Eastern Ecological Science Center
Sarah Stamps - Virginia Tech Geodesy and Tectonophysics Laboratory
Thomas Ulizio - Maryland Geological Survey
William Moore - Hampton University
Philippe Hensel - National Geodetic Survey
Ryan Hippenstiel - National Geodetic Survey
Former Lead Researchers
- Kurt McCoy - USGS
- Russ Lotspeich - USGS
- David Andreasen - Maryland Geological Survey

Project Management
The following partners contribute to the Chesapeake Bay Vertical Land Motion Project through both initial project design and ongoing project management:
- USGS Virginia and West Virginia Water Science Center
- USGS Eastern Ecological Science Center
- National Geodetic Survey
- Maryland Geological Survey
- Virginia Tech
- Hampton University
- University of Maryland
GPS Data Collection
Every October, many of our partners participate in our annual data collection event. Each year, around sixty benchmarks across Virginia and Maryland are each surveyed for multiple days using GPS survey equipment provided by the National Geodetic Survey.
Partners who participate in our GPS data collection event are:
- Virginia Tech
- Hampton University
- Virginia Institute of Marine Science
- University of Maryland Center for Environmental Science
- University of Delaware
- Maryland Geological Survey
- Maryland Department of Natural Resources: Chesapeake Bay National Estuarine Research Reserve
- National Oceanic and Atmospheric Administration (NOAA)
- The U. S. Fish and Wildlife Service
- The National Park Service
- The U. S. Geological Survey
<< Return to the Virginia Land Subsidence Homepage
Access our Datasets
All of the data collected by the Chesapeake Bay Vertical Land Motion Project is open access and archived through the National Science Foundation (NSF) Geodetic Facility for the Advancement of Geosciences (GAGE) operated by the University NAVSTAR Consortium (UNAVCO). Follow the links below to request access to our datasets.
- 2019 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2020 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2021 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2022 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2023 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
Journal Articles
The USGS Chesapeake Bay Program supports the cutting-edge research into vertical land motion undertaken by our partners. Below are scientific journal articles published by members of the Chesapeake Bay VLM research team:
Land Subsidence on the Virginia Coastal Plain
New Crowd Sourcing Will Contribute to Study of Land Subsidence and Sea-Level Rise in the Chesapeake Bay
Tripod-palooza—USGS Collaborates with Federal, State, and Academic Partners to Support Coastal Resiliency in the Wider Chesapeake Bay Area
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.

USGS scientist Jim Duda sets up a GPS tripod in preparation for a geodetic survey on Virginia's Eastern Shore.
USGS scientist Jim Duda sets up a GPS tripod in preparation for a geodetic survey on Virginia's Eastern Shore.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
A night time photograph of a total station used for land surveying used by the National Geodetic Survey.
A night time photograph of a total station used for land surveying used by the National Geodetic Survey.
A photograph of geodetic surveying at the Fort McHenry National Monument and Historic Site (National Park Service).
A photograph of geodetic surveying at the Fort McHenry National Monument and Historic Site (National Park Service).
A photograph of a total station used for land surveying.
A photograph of a total station used for land surveying.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
A photograph of a National Geodetic Survey (NOAA) continuous monitoring benchmark.
A photograph of a National Geodetic Survey (NOAA) continuous monitoring benchmark.
Geonarrative: Land Motion and Subsidence on the Virginia Coastal Plain
Chesapeake Bay region has the highest rate of relative sea-level rise on the Atlantic Coast of the United States, and data indicate that vertical land motion in the form of subsidence has been responsible for more than half the relative sea-level rise measured in the Chesapeake Bay region.
The Chesapeake Bay Vertical Land Motion Project is a cooperative effort between the USGS and our many partners to document and study this problem. Scientists from federal agencies, state government, and academic institutions across the Chesapeake Bay region are all working together to better understand and measure land subsidence, sea level rise, and shoreline retreat. The USGS recognizes and applauds every project member that works to make this research possible.
Research Partner Spotlight - Virginia Tech

Virginia Tech is a key partner in the Chesapeake Bay Vertical Land Motion Project. Professors and students at the Geodesy and Tectonophysics Laboratory process, verify, quality check, and archive all of the data collected through this project. Their research, interpretation, and numerical modeling continues to be invaluable to our shared efforts.
Partner Spotlight - National Geodetic Survey

Our partners at the National Geodetic Survey (NGS) contribute substantially to our efforts to understand land motion in the Chesapeake Bay. In addition to helping with project design, project management, and organizing field campaigns, our NGS partners also provide their expertise and equipment to our team along with training for our scientists and field techs.
Access our Datasets
All of the data collected by the Chesapeake Bay Vertical Land Motion Project is open access and archived through the National Science Foundation (NSF) Geodetic Facility for the Advancement of Geosciences (GAGE) operated by the University NAVSTAR Consortium (UNAVCO). Follow the links below to request access to our datasets.
- 2019 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2020 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2021 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2022 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2023 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
Lead Researchers
Each of these scientists has played a key leadership role in the Chesapeake Bay Vertical Land Motion Project.
Jim Duda - USGS Virginia and West Virginia Water Sciences Center
Joel Carr - USGS Eastern Ecological Science Center
Sarah Stamps - Virginia Tech Geodesy and Tectonophysics Laboratory
Thomas Ulizio - Maryland Geological Survey
William Moore - Hampton University
Philippe Hensel - National Geodetic Survey
Ryan Hippenstiel - National Geodetic Survey
Former Lead Researchers
- Kurt McCoy - USGS
- Russ Lotspeich - USGS
- David Andreasen - Maryland Geological Survey

Project Management
The following partners contribute to the Chesapeake Bay Vertical Land Motion Project through both initial project design and ongoing project management:
- USGS Virginia and West Virginia Water Science Center
- USGS Eastern Ecological Science Center
- National Geodetic Survey
- Maryland Geological Survey
- Virginia Tech
- Hampton University
- University of Maryland
GPS Data Collection
Every October, many of our partners participate in our annual data collection event. Each year, around sixty benchmarks across Virginia and Maryland are each surveyed for multiple days using GPS survey equipment provided by the National Geodetic Survey.
Partners who participate in our GPS data collection event are:
- Virginia Tech
- Hampton University
- Virginia Institute of Marine Science
- University of Maryland Center for Environmental Science
- University of Delaware
- Maryland Geological Survey
- Maryland Department of Natural Resources: Chesapeake Bay National Estuarine Research Reserve
- National Oceanic and Atmospheric Administration (NOAA)
- The U. S. Fish and Wildlife Service
- The National Park Service
- The U. S. Geological Survey
<< Return to the Virginia Land Subsidence Homepage
Access our Datasets
All of the data collected by the Chesapeake Bay Vertical Land Motion Project is open access and archived through the National Science Foundation (NSF) Geodetic Facility for the Advancement of Geosciences (GAGE) operated by the University NAVSTAR Consortium (UNAVCO). Follow the links below to request access to our datasets.
- 2019 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2020 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2021 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2022 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
- 2023 - Chesapeake Bay Vertical Land Motions GPS/GNSS Observations Dataset
Journal Articles
The USGS Chesapeake Bay Program supports the cutting-edge research into vertical land motion undertaken by our partners. Below are scientific journal articles published by members of the Chesapeake Bay VLM research team:
Land Subsidence on the Virginia Coastal Plain
New Crowd Sourcing Will Contribute to Study of Land Subsidence and Sea-Level Rise in the Chesapeake Bay
Tripod-palooza—USGS Collaborates with Federal, State, and Academic Partners to Support Coastal Resiliency in the Wider Chesapeake Bay Area
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.
A GNSS (Global Navigation Satellite System) Receiver mounted atop a GPS (Global Positioning System) tripod for use in a geodetic survey on Virginia's Eastern Shore.

USGS scientist Jim Duda sets up a GPS tripod in preparation for a geodetic survey on Virginia's Eastern Shore.
USGS scientist Jim Duda sets up a GPS tripod in preparation for a geodetic survey on Virginia's Eastern Shore.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
A night time photograph of a total station used for land surveying used by the National Geodetic Survey.
A night time photograph of a total station used for land surveying used by the National Geodetic Survey.
A photograph of geodetic surveying at the Fort McHenry National Monument and Historic Site (National Park Service).
A photograph of geodetic surveying at the Fort McHenry National Monument and Historic Site (National Park Service).
A photograph of a total station used for land surveying.
A photograph of a total station used for land surveying.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
This photograph shows a high-accuracy geodetic surveying tripod used to measure vertical land motion.
A photograph of a National Geodetic Survey (NOAA) continuous monitoring benchmark.
A photograph of a National Geodetic Survey (NOAA) continuous monitoring benchmark.