My research focuses on the role that winds, waves, and circulation have on transforming the beach under seasonal, long-term, and extreme events. The majority of my research is based on the development and use of numerical models to explain complex hydro- and morphodynamic processes in the coastal region and on using data assimilation methods to enhance predictions of coastal change. Understanding these processes, on varying spatial and temporal scales, is essential to designing sustainable coastal civil infrastructure systems, protecting ecosystems and communities, and assessing long-term vulnerability. This work requires the collection and processing of in situ and remote sensing data to initialize and validate numerical models. I am interested in all aspects of nearshore circulation and the impacts of this forcing on habitats, coastal change, and societal impacts.
Science and Products
The influence of bed friction variability due to land cover on storm-driven barrier island morphodynamics
Variations in bed friction due to land cover type have the potential to influence morphologic change during storm events; the importance of these variations can be studied through numerical simulation and experimentation at locations with sufficient observational data to initialize realistic scenarios, evaluate model accuracy and guide...Passeri, Davina L.; Long, Joseph W.; Plant, Nathaniel G.; Bilskie, Matthew V.; Hagen, Scott C.
Vector shorelines and associated shoreline change rates derived from Lidar and aerial imagery for Dauphin Island, Alabama: 1940-2015
In support of studies and assessments of barrier island evolution in the Gulf of Mexico, rates of shoreline change for Dauphin Island, Alabama, were calculated using two different shoreline proxy datasets with a total temporal span of 75 years. Mean High Water line (MHW) shorelines were generated from 14 lidar datasets from 1998 to 2014, and...Henderson, Rachel; Nelson, Paul R.; Long, Joseph W.; Smith, Christopher G.
EAARL Coastal Topography—Chandeleur Islands, Post-Hurricane Katrina, 2005
These datasets, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provide lidar-derived first-surface and bare-earth topography for the Chandeleur Islands, Louisiana. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during September 2005, immediately following...Kranenburg, Christine; Long, Joseph W.; Fredericks, Alexandra M.
Lidar-derived beach morphology (dune crest, dune toe, and shoreline) for U.S. sandy coastlines
The USGS National Assessment of Coastal Change Hazards project aims to identify areas of the nation’s coastline that are most vulnerable to extreme storms and long-term shoreline change. These assessments require coastal elevation data across diverse geographic regions and covering a time span of many years. The datasets published here,...Doran, Kara; Long, Joseph W.; Birchler, Justin; Brenner, Owen T.; Hardy, Matthew; Morgan, Karen L. M.; Stockdon, Hilary F.; Torres, Miguel Loubriel
Hurricane Matthew overwash extents
The National Assessment of Coastal Change Hazards project exists to understand and predict storm impacts to our nation's coastlines. This data defines the alongshore extent of overwash deposits attributed to coastal processes during Hurricane Matthew.Doran, Kara; Long, Joseph W.; Birchler, Justin; Range, Ginger
Correction of elevation offsets in multiple co-located lidar datasets
IntroductionTopographic elevation data collected with airborne light detection and ranging (lidar) can be used to analyze short- and long-term changes to beach and dune systems. Analysis of multiple lidar datasets at Dauphin Island, Alabama, revealed systematic, island-wide elevation differences on the order of 10s of centimeters (cm) that were...Thompson, David M.; Dalyander, P. Soupy; Long, Joseph W.; Plant, Nathaniel G.
Laboratory observations of artificial sand and oil agglomerates video and velocity data
The U.S. Geological Survey conducted experiments during March of 2014 to expand the available data on sand and oil agglomerate motion; test shear stress based incipient motion parameterizations in a controlled, laboratory setting; and directly observe sand and oil agglomerate exhumation and burial processes. Experiments were carried out at the...Jenkins, Robert; Dalyander, P. Soupy; Penko, Allison; Long, Joseph W.; Nelson, Timothy
Storm-impact scenario XBeach model inputs and tesults
The XBeach model input and output of topography and bathymetry resulting from simulation of storm-impact scenarios at the Chandeleur Islands, LA, as described in USGS Open-File Report 2017–1009 (https://doi.org/10.3133/ofr20171009), are provided here. For further information regarding model input generation and visualization of model output...Mickey, Rangley; Long, Joseph W.; Thompson, David M.; Plant, Nathaniel G.; Dalyander, P. Soupy
A methodology for modeling barrier island storm-impact scenarios
A methodology for developing a representative set of storm scenarios based on historical wave buoy and tide gauge data for a region at the Chandeleur Islands, Louisiana, was developed by the U.S. Geological Survey. The total water level was calculated for a 10-year period and analyzed against existing topographic data to identify when storm-...Mickey, Rangley C.; Long, Joseph W.; Plant, Nathaniel G.; Thompson, David M.; Dalyander, P. Soupy
Testing model parameters for wave‐induced dune erosion using observations from Hurricane Sandy
Models of dune erosion depend on a set of assumptions that dictate the predicted evolution of dunes throughout the duration of a storm. Lidar observations made before and after Hurricane Sandy at over 800 profiles with diverse dune elevations, widths, and volumes are used to quantify specific dune erosion model parameters including the dune face...Overbeck, Jacquelyn R.; Long, Joseph W.; Stockdon, Hilary F.
Beach Slopes of New Jersey
The National Assessment of Coastal Change Hazards project derives features of beach morphology from lidar elevation data for the purpose of understanding and predicting storm impacts to our nation's coastlines. This dataset defines mean beach slopes along the United States Northeast Atlantic Ocean for New Jersey for data collected at various times...Doran, Kara; Long, Joseph W.; Birchler, Justin; Morgan, Karen L. M.
Probabilistic assessment of erosion and flooding risk in the northern Gulf of Mexico
We assess erosion and flooding risk in the northern Gulf of Mexico by identifying interdependencies among oceanographic drivers and probabilistically modeling the resulting potential for coastal change. Wave and water level observations are used to determine relationships between six hydrodynamic parameters that influence total water level and...Plant, Nathaniel G.; Wahl, Thomas; Long, Joseph W.