The primary objective of this project is to increase our understanding of the physical processes that cause coastal change, and ultimately improve our capability to predict the processes and their impacts. This will be approached by using geophysical surveys, oceanographic studies, and predictive models to investigate the interactions of shoreline, nearshore, and offshore sediment transport processes driving coastal change.
Coastal erosion is a pervasive societal problem for much of the world's shoreline. The ability to understand and predict coastal change is critical to mitigating its associated hazards. Two fundamental aspects of the USGS mission are to provide reliable scientific information to describe and understand the Earth and to minimize loss of life and property from natural disasters. The goal of the Coastal Change Processes Project is to investigate interactions between the shoreline, nearshore, and offshore sediment transport processes that drive coastal change and develop a capability to predict their impacts. To achieve this goal, the project will conduct geophysical surveys to investigate the goelogic framework of the region, deploy oceanographic instrumentation to measure regional physical processes, and develop physics-based models that hindcast these interactions over a variety of spaital and temporal domains. All of these approaches can be integrated into a physics based deterministic predictive system the can forecast changes.
Our current understanding of coastal sediment transport and geology suggests that examining coastal processes at sub-regional (ones to tens of km) to regional scales (100s of km) provides significant insight into coastal zone evolution. The Coastal Change Processes Project is focusing on several key sub-regional areas such as:
- Long Bay, SC: regional coastal erosion with limited sand supply
- Cape Hatteras, NC: local massive sediment convergence processes
- Outer Banks, NC: uninterrupted extensive length of coastline to study variations in alongshore sediment transport
- Fire Island, NY: regional coastal erosion with an extensive sand supply, including a field of offshore shore-face connected sand ridges
Each of these sub-regions has characteristic features and processes that when quantified will contribute to a broader understanding of regional coastal processes. In addition to advancing our understanding of coastal change issues related to storm impacts, sediment budgets, and sediment transport linkages between the beach, shoreface and inner shelf, project research will improve our basic knowledge of coastal ocean circulation and sediment transport processes.
Below are other science projects associated with this project.
Coastal Change Processes- Fire Island, NY
Coastal and Estuarine Dynamics Project
Coastal Change Processes- Cape Hatteras, NC
Coastal Change Processes- South Carolina
Coastal Change Processes- Outer Banks, NC
Below are publications associated with this project.
Inner-shelf circulation and sediment dynamics on a series of shoreface connected ridges offshore of Fire Island, NY
Modification of the Quaternary stratigraphic framework of the inner-continental shelf by Holocene marine transgression: An example offshore of Fire Island, New York
A wetting and drying scheme for ROMS
Holocene sediment distribution on the inner continental shelf of northeastern South Carolina: implications for the regional sediment budget and long-term shoreline response
Geologic evidence for onshore sediment transport from the inner continental shelf: Fire Island, New York
Along-shelf current variability on the Catalan inner-shelf (NW Mediterranean)
Storm-induced inner-continental shelf circulation and sediment transport: Long Bay, South Carolina
Coupled atmosphere-ocean-wave simulations of a storm event over the Gulf of Lion and Balearic Sea
Implementation of the vortex force formalism in the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system for inner shelf and surf zone applications
Modeling transport and deposition of the Mekong River sediment
Ocean-atmosphere dynamics during Hurricane Ida and Nor'Ida: An application of the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system
Below are partners associated with this project.
- Overview
The primary objective of this project is to increase our understanding of the physical processes that cause coastal change, and ultimately improve our capability to predict the processes and their impacts. This will be approached by using geophysical surveys, oceanographic studies, and predictive models to investigate the interactions of shoreline, nearshore, and offshore sediment transport processes driving coastal change.
Coastal erosion is a pervasive societal problem for much of the world's shoreline. The ability to understand and predict coastal change is critical to mitigating its associated hazards. Two fundamental aspects of the USGS mission are to provide reliable scientific information to describe and understand the Earth and to minimize loss of life and property from natural disasters. The goal of the Coastal Change Processes Project is to investigate interactions between the shoreline, nearshore, and offshore sediment transport processes that drive coastal change and develop a capability to predict their impacts. To achieve this goal, the project will conduct geophysical surveys to investigate the goelogic framework of the region, deploy oceanographic instrumentation to measure regional physical processes, and develop physics-based models that hindcast these interactions over a variety of spaital and temporal domains. All of these approaches can be integrated into a physics based deterministic predictive system the can forecast changes.
Our current understanding of coastal sediment transport and geology suggests that examining coastal processes at sub-regional (ones to tens of km) to regional scales (100s of km) provides significant insight into coastal zone evolution. The Coastal Change Processes Project is focusing on several key sub-regional areas such as:
- Long Bay, SC: regional coastal erosion with limited sand supply
- Cape Hatteras, NC: local massive sediment convergence processes
- Outer Banks, NC: uninterrupted extensive length of coastline to study variations in alongshore sediment transport
- Fire Island, NY: regional coastal erosion with an extensive sand supply, including a field of offshore shore-face connected sand ridges
Each of these sub-regions has characteristic features and processes that when quantified will contribute to a broader understanding of regional coastal processes. In addition to advancing our understanding of coastal change issues related to storm impacts, sediment budgets, and sediment transport linkages between the beach, shoreface and inner shelf, project research will improve our basic knowledge of coastal ocean circulation and sediment transport processes.
- Science
Below are other science projects associated with this project.
Coastal Change Processes- Fire Island, NY
Fire Island, a 50-km long barrier-island system between Fire Island Inlet and Moriches Inlet, attracts significant tourism, includes federal, state, and county parks, contains a number of coastal communities, provides storm damage protection to the adjacent heavily populated mainland, and supports a distinct barrier island ecosystem, all of which are affected by coastal change. Mitigating the...Coastal and Estuarine Dynamics Project
Coastal and Estuarine Dynamics Project exists to support ocean, coastal and estuarine research. The staff have a broad set of skills; from instrument design and development to all forms of work at sea to software development and data management. The team has successfully deployed and recovered more than 1000 data collection platforms for research in the last 30 years.Coastal Change Processes- Cape Hatteras, NC
The most prominent morphologic features along the shoreline of the Carolinas are its four capes. From north to south, Cape Hatteras, Cape Lookout, Cape Fear, and Cape Romain segment the coastline into the northern outer banks, Raleigh Bay, Onslo Bay, and Long Bay regions. Continental shelf areas seaward of the capes are characterized by large, highly dynamic shoal complexes, which influence...Coastal Change Processes- South Carolina
Understanding the processes that control local sediment fluxes is critical in evaluating regional vulnerability to coastal erosion. This project task involves the analysis of observational data collected as part of the South Carolina Coastal Erosion Study (SCCES), and additional coastal process modeling for the Grand Strand region. Modeling based on the physical oceanographic observations will...Coastal Change Processes- Outer Banks, NC
The objective of this task is to improve the capabilities of coastal change models to predict large-scale shoreline change on open-ocean sandy coasts, with specific application to the Northern Outer Banks of North Carolina. Numerical models will be tested and developed using high-resolution observations of geological framework and shoreline change in North Carolina, with the objective of first... - Publications
Below are publications associated with this project.
Inner-shelf circulation and sediment dynamics on a series of shoreface connected ridges offshore of Fire Island, NY
Locations along the inner-continental shelf offshore of Fire Island, NY, are characterized by a series of shoreface-connected ridges (SFCRs). These sand ridges have approximate dimensions of 10 km in length, 3 km spacing, and up to ∼8 m ridge to trough relief and are oriented obliquely at approximately 30° clockwise from the coastline. Stability analysis from previous studies explains how sand ridAuthorsJohn C. Warner, Jeffrey H. List, William C. Schwab, George Voulgaris, Brandy N. Armstrong, N MarshallModification of the Quaternary stratigraphic framework of the inner-continental shelf by Holocene marine transgression: An example offshore of Fire Island, New York
The inner-continental shelf off Fire Island, New York was mapped in 2011 using interferometric sonar and high-resolution chirp seismic-reflection systems. The area mapped is approximately 50 km long by 8 km wide, extending from Moriches Inlet to Fire Island Inlet in water depths ranging from 8 to 32 m. The morphology of this inner-continental shelf region and modern sediment distribution patternsAuthorsWilliam C. Schwab, Wayne E. Baldwin, Jane F. Denny, Cheryl J. Hapke, Paul T. Gayes, Jeffrey H. List, John C. WarnerA wetting and drying scheme for ROMS
The processes of wetting and drying have many important physical and biological impacts on shallow water systems. Inundation and dewatering effects on coastal mud flats and beaches occur on various time scales ranging from storm surge, periodic rise and fall of the tide, to infragravity wave motions. To correctly simulate these physical processes with a numerical model requires the capability of tAuthorsJohn C. Warner, Zafer Defne, Kevin Haas, Hernan G. ArangoHolocene sediment distribution on the inner continental shelf of northeastern South Carolina: implications for the regional sediment budget and long-term shoreline response
High-resolution geophysical and sediment sampling surveys were conducted offshore of the Grand Strand, South Carolina to define the shallow geologic framework of the inner shelf. Results are used to identify and map Holocene sediment deposits, infer sediment transport pathways, and discuss implications for the regional coastal sediment budget. The thickest deposits of Holocene sediment observed onAuthorsJane F. Denny, William C. Schwab, Wayne E. Baldwin, Walter A. Barnhardt, Paul T. Gayes, R.A. Morton, John C. Warner, Neal W. Driscoll, George VoulgarisGeologic evidence for onshore sediment transport from the inner continental shelf: Fire Island, New York
Sediment budget analyses along the south shore of Fire Island, New York, have been conducted and debated in the scientific and coastal engineering literature for decades. It is well documented that a primary component of sediment transport in this system is directed alongshore from E to W, but discrepancies in volumetric sediment budget calculations remain. An additional quantity of sand, averaginAuthorsWilliam C. Schwab, Wayne E. Baldwin, Cheryl J. Hapke, Erika E. Lentz, Paul T. Gayes, Jane F. Denny, Jeffrey H. List, John C. WarnerAlong-shelf current variability on the Catalan inner-shelf (NW Mediterranean)
We examine the circulation over the inner shelf of the Catalan Sea using observations of currents obtained from three ADCPs within the inner-shelf (24 and 50 m depth) during March-April 2011. The along-shelf current fluctuations during that period are mainly controlled by the local wind stress on short time scales and by remote pressure gradients on synoptic time scales. Different forcing mechanisAuthorsManel Grifoll, Alfredo L. Aretxabaleta, Manuel Espino, John C. WarnerStorm-induced inner-continental shelf circulation and sediment transport: Long Bay, South Carolina
Long Bay is a sediment-starved, arcuate embayment located along the US East Coast connecting both South and North Carolina. In this region the rates and pathways of sediment transport are important because they determine the availability of sediments for beach nourishment, seafloor habitat, and navigation. The impact of storms on sediment transport magnitude and direction were investigated duringAuthorsJohn C. Warner, Brandy N. Armstrong, Charlene S. Sylvester, George Voulgaris, Tim Nelson, William C. Schwab, Jane F. DennyCoupled atmosphere-ocean-wave simulations of a storm event over the Gulf of Lion and Balearic Sea
The coastal areas of the North-Western Mediterranean Sea are one of the most challenging places for ocean forecasting. This region is exposed to severe storms events that are of short duration. During these events, significant air-sea interactions, strong winds and large sea-state can have catastrophic consequences in the coastal areas. To investigate these air-sea interactions and the oceanic resAuthorsLionel Renault, Jacopo Chiggiato, John C. Warner, Marta Gomez, Guillermo Vizoso, Joaquin TintoreImplementation of the vortex force formalism in the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system for inner shelf and surf zone applications
The coupled ocean-atmosphere-wave-sediment transport modeling system (COAWST) enables simulations that integrate oceanic, atmospheric, wave and morphological processes in the coastal ocean. Within the modeling system, the three-dimensional ocean circulation module (ROMS) is coupled with the wave generation and propagation model (SWAN) to allow full integration of the effect of waves on circulationAuthorsNirnimesh Kumar, George Voulgaris, John C. Warner, Maitane OlabarrietaModeling transport and deposition of the Mekong River sediment
A Coupled Wave–Ocean–SedimentTransport Model was used to hindcast coastal circulation and fine sedimenttransport on the Mekong shelf in southeastern Asian in 2005. Comparisons with limited observations showed that the model simulation captured the regional patterns and temporal variability of surface wave, sea level, and suspended sediment concentration reasonably well. Significant seasonality inAuthorsZuo Xue, Ruoying He, J. Paul Liu, John C. WarnerOcean-atmosphere dynamics during Hurricane Ida and Nor'Ida: An application of the coupled ocean-atmosphere-wave-sediment transport (COAWST) modeling system
The coupled ocean–atmosphere–wave–sediment transport (COAWST) modeling system was used to investigate atmosphere–ocean–wave interactions in November 2009 during Hurricane Ida and its subsequent evolution to Nor’Ida, which was one of the most costly storm systems of the past two decades. One interesting aspect of this event is that it included two unique atmospheric extreme conditions, a hurricaneAuthorsMaitane Olabarrieta, John C. Warner, Brandy N. Armstrong, Joseph B. Zambon, Ruoying He - Partners
Below are partners associated with this project.