Modeling Barrier Island Evolution, Shoreface Morphology, and Overwash
Barrier island field observations provide information about past and current environmental conditions and changes over time; however, they can’t tell us about the future. Models can predict possible future behaviors but are only as good as their input data. By integrating both observations and models, we can extend observations and arrive at more realistic predictions of barrier island behavior and vulnerability to storms and sea-level rise.
There are several models and tools that we use to analyze barrier island change. For example, reduced-complexity models (RCM) are important tools for exploring the behavior of coastal barrier systems at decadal to centennial scales (10s to 100s of years). They focus on broad elements of barrier system geomorphology rather than capturing every component. Through isolation of individual processes, RCM can help illuminate the importance and magnitude of different forces on system evolution, such as rate of sea-level rise, increases or decreases in sediment availability, as well as direct landscape interventions by humans. Due to their relative simplicity, RCM are useful not only for contrasting the effects of different forces, but also for pairing with other models and field data to form comprehensive and transdisciplinary approaches to understanding coastal evolution.
When paired with remote sensing observations and geologic field data, RCM can be used to infer the sensitivity of real-world systems to past changes in environmental forces. This helps us reconstruct the history of coastal systems and determine the best parameters for forward modeling scenarios—predicting future change. We use a coupled field-model approach to explore interactions between the shelf, shoreface, beach, dune, and back-barrier, allowing us to investigate whole-barrier dynamics that are often overlooked by research focusing solely on each of these different domains. This can ultimately assist managers and stakeholders in understanding long-term changes in coastal landscape evolution driven by the interconnectivity of these domains under different environmental forcing scenarios.
Whole-barrier dynamics captured by reduced-complexity models include interactions between shoreline erosion, sediment storage in dunes, and overwash. These processes are demonstrated in a timelapse of landscape change at Edwin B. Forsythe National Wildlife Refuge in Atlantic County, New Jersey. The barrier here has been extensively reshaped by changes in sediment delivery and overwash since 1930.
Learn more about the Coastal Sediment Availability and Flux project
Coastal Sediment Availability and Flux (CSAF)
Barrier island field observations provide information about past and current environmental conditions and changes over time; however, they can’t tell us about the future. Models can predict possible future behaviors but are only as good as their input data. By integrating both observations and models, we can extend observations and arrive at more realistic predictions of barrier island behavior and vulnerability to storms and sea-level rise.
There are several models and tools that we use to analyze barrier island change. For example, reduced-complexity models (RCM) are important tools for exploring the behavior of coastal barrier systems at decadal to centennial scales (10s to 100s of years). They focus on broad elements of barrier system geomorphology rather than capturing every component. Through isolation of individual processes, RCM can help illuminate the importance and magnitude of different forces on system evolution, such as rate of sea-level rise, increases or decreases in sediment availability, as well as direct landscape interventions by humans. Due to their relative simplicity, RCM are useful not only for contrasting the effects of different forces, but also for pairing with other models and field data to form comprehensive and transdisciplinary approaches to understanding coastal evolution.
When paired with remote sensing observations and geologic field data, RCM can be used to infer the sensitivity of real-world systems to past changes in environmental forces. This helps us reconstruct the history of coastal systems and determine the best parameters for forward modeling scenarios—predicting future change. We use a coupled field-model approach to explore interactions between the shelf, shoreface, beach, dune, and back-barrier, allowing us to investigate whole-barrier dynamics that are often overlooked by research focusing solely on each of these different domains. This can ultimately assist managers and stakeholders in understanding long-term changes in coastal landscape evolution driven by the interconnectivity of these domains under different environmental forcing scenarios.
Whole-barrier dynamics captured by reduced-complexity models include interactions between shoreline erosion, sediment storage in dunes, and overwash. These processes are demonstrated in a timelapse of landscape change at Edwin B. Forsythe National Wildlife Refuge in Atlantic County, New Jersey. The barrier here has been extensively reshaped by changes in sediment delivery and overwash since 1930.
Learn more about the Coastal Sediment Availability and Flux project