Joseph Long (Former Employee)
Science and Products
Filter Total Items: 13
Online Merging and Gridding of Topographic and Bathymetric Data Sources
Digital Elevation Models (DEM) provide details of the earth’s surface and are used for visualization, physical modeling, and elevation change analysis. Creating DEMs in coastal environments is complicated by the highly ephemeral nature of the coast and the need to span the land-water interface. This requires merging multiple bathymetric and topographic datasets that have been collected at differe
Filter Total Items: 17
EAARL Coastal Topography-Louisiana, Alabama, and Florida, 2008: First Return Elevation Data
This dataset, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provides first and last return elevation data collected during a June 24, 2008 airborne lidar survey for the Chandeleur Islands, LA, Dauphin Island, AL, Santa Rosa Island, FL, and Bon Secour, AL. Elevation measurements were collected over the area using the National Aeronautics and Space Administ
EAARL Coastal Topography-Louisiana, Mississippi and Alabama, September 2006: First and Last Return Elevation Data
This dataset, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provides first and last return elevation data collected during a September 20-22, 2006 airborne lidar survey for the Chandeleur Islands, Louisiana, and Cat Island, Mississippi, through Dauphin Island, Alabama. Elevation measurements were collected over the area using the National Aeronautics and
EAARL Coastal Topography-Dauphin Island, 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 Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during September 2005, immediately following Hurricane Katrina landfall.
EAARL Coastal Topography-Dauphin Island, 2010
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 Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) on July 24, 2010, one day before remnants from the dissipated Tropical Storm Bonnie came ashore.
Beach Slopes of North Carolina: Salvo to Duck
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 Southeast Atlantic Ocean from Salvo to Duck, North Carolina for data collected at various times between 1996 and 2012. For fu
Filter Total Items: 41
Effects of proposed navigation channel improvements on sediment transport in Mobile Harbor, Alabama
A Delft3D model was developed to evaluate the potential effects of proposed navigationchannel deepening and widening in Mobile Harbor, Alabama. The model performance wasassessed through comparisons of modeled and observed data of water levels, velocities, and bedlevel changes; the model captured hydrodynamic and sediment transport patterns in the studyarea with skill. The validated model was used
Authors
Davina Passeri, Joseph W. Long, Robert L. Jenkins, David M. Thompson
Dynamic modeling of barrier island response to hurricane storm surge under future sea level rise
Sea level rise (SLR) has the potential to exacerbate the impacts of extreme storm events on the coastal landscape. This study examines the coupled interactions of SLR on storm-driven hydrodynamics and barrier island morphology. A numerical model is used to simulate the hydrodynamic and morphodynamic impacts of two Gulf of Mexico hurricanes under present-day and future sea levels. SLR increased sur
Authors
Davina Passeri, Matthew V. Bilskie, Nathaniel G. Plant, Joseph W. Long, Scott C. Hagen
A framework for modeling scenario-based barrier island storm impacts
Methods for investigating the vulnerability of existing or proposed coastal features to storm impacts often rely on simplified parametric models or one-dimensional process-based modeling studies that focus on changes to a profile across a dune or barrier island. These simple studies tend to neglect the impacts to curvilinear or alongshore varying island planforms, influence of non-uniform nearshor
Authors
Rangley C. Mickey, Joseph W. Long, P. Soupy Dalyander, Nathaniel G. Plant, David M. Thompson
Laboratory observations of artificial sand and oil agglomerates
Sand and oil agglomerates (SOAs) form when weathered oil reaches the surf zone and combines with suspended sediments. The presence of large SOAs in the form of thick mats (up to 10 centimeters [cm] in height and up to 10 square meters [m2] in area) and smaller SOAs, sometimes referred to as surface residual balls (SRBs), may lead to the re-oiling of beaches previously affected by an oil spill. A l
Authors
Robert L. Jenkins, P. Soupy Dalyander, Allison Penko, Joseph W. Long
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 interpretations. Two-dimensional in the horizontal plane (2DH)
Authors
Davina Passeri, Joseph W. Long, Nathaniel G. Plant, Matthew V. Bilskie, Scott C. Hagen
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 not attributable to real-world change and, therefore,
Authors
David M. Thompson, P. Soupy Dalyander, Joseph W. Long, Nathaniel G. Plant
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-induced wave action would affect island morphology. These
Authors
Rangley C. Mickey, Joseph W. Long, Nathaniel G. Plant, David M. Thompson, P. Soupy Dalyander
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 slope, which controls dune avalanching, and the traj
Authors
Jacquelyn R. Overbeck, Joseph W. Long, Hilary F. Stockdon
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 therefore erosion and flooding, through consideration
Authors
Nathaniel G. Plant, Thomas Wahl, Joseph W. Long
Forcing and variability of nonstationary rip currents
Surface wave transformation and the resulting nearshore circulation along a section of coast with strong alongshore bathymetric gradients outside the surf zone are modeled for a consecutive 4 week time period. The modeled hydrodynamics are compared to in situ measurements of waves and currents collected during the Nearshore Canyon Experiment and indicate that for the entire range of observed condi
Authors
Joseph W. Long, H.T. Özkan-Haller
Community for Data Integration 2014 annual report
The U.S. Geological Survey (USGS) researches Earth science to help address complex issues affecting society and the environment. In 2006, the USGS held the first Scientific Information Management Workshop to bring together staff from across the organization to discuss the data and information management issues affecting the integration and delivery of Earth science research and investigate the use
Authors
Madison L. Langseth, Michelle Y. Chang, Jennifer Carlino, Daniella D. Birch, Joshua Bradley, R. Sky Bristol, Craig Conzelmann, Robert H. Diehl, Paul S. Earle, Laura E. Ellison, Anthony L. Everette, Pamela L. Fuller, Janice M. Gordon, David L. Govoni, Michelle R. Guy, Heather S. Henkel, Vivian B. Hutchison, Tim Kern, Frances L. Lightsom, Joseph W. Long, Ryan Longhenry, Todd M. Preston, Stan W. Smith, Roland J. Viger, Katherine Wesenberg, Eric C. Wood
Integrating geophysical and oceanographic data to assess interannual variability in longshore sediment transport
Despite their utility for prediction of coastal behavior and for coastal management, littoral sediment budgets are difficult to quantify over large regions of coastline and over short time scales. In this study, bathymetric change analysis shows differences in the magnitude and spatial location of erosion and accretion over three years; more net accumulation occurred at the littoral end point of t
Authors
Jennifer L. Miselis, Joseph W. Long, P. Soupy Dalyander, James G. Flocks, Noreen A. Buster, Rangley C. Mickey
Non-USGS Publications**
Long, J. W., and H. T. Özkan-Haller, 2009, Low-frequency characteristics of wave group–forced vortices, J. Geophys. Res., 114, C08004, doi:10.1029/2008JC004894.
Scott, C.P., Cox, D.T., Maddux, T.B., and Long, J.W., 2005, Large-scale laboratory observations of turbulence on a fixed barred beach: Measurement Science and Technology, v. 16, p. 1903, doi: 10.1088/0957-0233/16/10/004.
Long, J. W., and H. T. Özkan-Haller, 2005, Offshore controls on nearshore rip currents, J. Geophys. Res., 110, C12007, doi:10.1029/2005JC003018.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.
Science and Products
Filter Total Items: 13
Online Merging and Gridding of Topographic and Bathymetric Data Sources
Digital Elevation Models (DEM) provide details of the earth’s surface and are used for visualization, physical modeling, and elevation change analysis. Creating DEMs in coastal environments is complicated by the highly ephemeral nature of the coast and the need to span the land-water interface. This requires merging multiple bathymetric and topographic datasets that have been collected at differe
Filter Total Items: 17
EAARL Coastal Topography-Louisiana, Alabama, and Florida, 2008: First Return Elevation Data
This dataset, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provides first and last return elevation data collected during a June 24, 2008 airborne lidar survey for the Chandeleur Islands, LA, Dauphin Island, AL, Santa Rosa Island, FL, and Bon Secour, AL. Elevation measurements were collected over the area using the National Aeronautics and Space Administ
EAARL Coastal Topography-Louisiana, Mississippi and Alabama, September 2006: First and Last Return Elevation Data
This dataset, prepared by the U.S. Geological Survey St. Petersburg Coastal and Marine Science Center, provides first and last return elevation data collected during a September 20-22, 2006 airborne lidar survey for the Chandeleur Islands, Louisiana, and Cat Island, Mississippi, through Dauphin Island, Alabama. Elevation measurements were collected over the area using the National Aeronautics and
EAARL Coastal Topography-Dauphin Island, 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 Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) during September 2005, immediately following Hurricane Katrina landfall.
EAARL Coastal Topography-Dauphin Island, 2010
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 Dauphin Island, Alabama. Elevation measurements were acquired by the Experimental Advanced Airborne Research Lidar (EAARL) on July 24, 2010, one day before remnants from the dissipated Tropical Storm Bonnie came ashore.
Beach Slopes of North Carolina: Salvo to Duck
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 Southeast Atlantic Ocean from Salvo to Duck, North Carolina for data collected at various times between 1996 and 2012. For fu
Filter Total Items: 41
Effects of proposed navigation channel improvements on sediment transport in Mobile Harbor, Alabama
A Delft3D model was developed to evaluate the potential effects of proposed navigationchannel deepening and widening in Mobile Harbor, Alabama. The model performance wasassessed through comparisons of modeled and observed data of water levels, velocities, and bedlevel changes; the model captured hydrodynamic and sediment transport patterns in the studyarea with skill. The validated model was used
Authors
Davina Passeri, Joseph W. Long, Robert L. Jenkins, David M. Thompson
Dynamic modeling of barrier island response to hurricane storm surge under future sea level rise
Sea level rise (SLR) has the potential to exacerbate the impacts of extreme storm events on the coastal landscape. This study examines the coupled interactions of SLR on storm-driven hydrodynamics and barrier island morphology. A numerical model is used to simulate the hydrodynamic and morphodynamic impacts of two Gulf of Mexico hurricanes under present-day and future sea levels. SLR increased sur
Authors
Davina Passeri, Matthew V. Bilskie, Nathaniel G. Plant, Joseph W. Long, Scott C. Hagen
A framework for modeling scenario-based barrier island storm impacts
Methods for investigating the vulnerability of existing or proposed coastal features to storm impacts often rely on simplified parametric models or one-dimensional process-based modeling studies that focus on changes to a profile across a dune or barrier island. These simple studies tend to neglect the impacts to curvilinear or alongshore varying island planforms, influence of non-uniform nearshor
Authors
Rangley C. Mickey, Joseph W. Long, P. Soupy Dalyander, Nathaniel G. Plant, David M. Thompson
Laboratory observations of artificial sand and oil agglomerates
Sand and oil agglomerates (SOAs) form when weathered oil reaches the surf zone and combines with suspended sediments. The presence of large SOAs in the form of thick mats (up to 10 centimeters [cm] in height and up to 10 square meters [m2] in area) and smaller SOAs, sometimes referred to as surface residual balls (SRBs), may lead to the re-oiling of beaches previously affected by an oil spill. A l
Authors
Robert L. Jenkins, P. Soupy Dalyander, Allison Penko, Joseph W. Long
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 interpretations. Two-dimensional in the horizontal plane (2DH)
Authors
Davina Passeri, Joseph W. Long, Nathaniel G. Plant, Matthew V. Bilskie, Scott C. Hagen
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 not attributable to real-world change and, therefore,
Authors
David M. Thompson, P. Soupy Dalyander, Joseph W. Long, Nathaniel G. Plant
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-induced wave action would affect island morphology. These
Authors
Rangley C. Mickey, Joseph W. Long, Nathaniel G. Plant, David M. Thompson, P. Soupy Dalyander
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 slope, which controls dune avalanching, and the traj
Authors
Jacquelyn R. Overbeck, Joseph W. Long, Hilary F. Stockdon
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 therefore erosion and flooding, through consideration
Authors
Nathaniel G. Plant, Thomas Wahl, Joseph W. Long
Forcing and variability of nonstationary rip currents
Surface wave transformation and the resulting nearshore circulation along a section of coast with strong alongshore bathymetric gradients outside the surf zone are modeled for a consecutive 4 week time period. The modeled hydrodynamics are compared to in situ measurements of waves and currents collected during the Nearshore Canyon Experiment and indicate that for the entire range of observed condi
Authors
Joseph W. Long, H.T. Özkan-Haller
Community for Data Integration 2014 annual report
The U.S. Geological Survey (USGS) researches Earth science to help address complex issues affecting society and the environment. In 2006, the USGS held the first Scientific Information Management Workshop to bring together staff from across the organization to discuss the data and information management issues affecting the integration and delivery of Earth science research and investigate the use
Authors
Madison L. Langseth, Michelle Y. Chang, Jennifer Carlino, Daniella D. Birch, Joshua Bradley, R. Sky Bristol, Craig Conzelmann, Robert H. Diehl, Paul S. Earle, Laura E. Ellison, Anthony L. Everette, Pamela L. Fuller, Janice M. Gordon, David L. Govoni, Michelle R. Guy, Heather S. Henkel, Vivian B. Hutchison, Tim Kern, Frances L. Lightsom, Joseph W. Long, Ryan Longhenry, Todd M. Preston, Stan W. Smith, Roland J. Viger, Katherine Wesenberg, Eric C. Wood
Integrating geophysical and oceanographic data to assess interannual variability in longshore sediment transport
Despite their utility for prediction of coastal behavior and for coastal management, littoral sediment budgets are difficult to quantify over large regions of coastline and over short time scales. In this study, bathymetric change analysis shows differences in the magnitude and spatial location of erosion and accretion over three years; more net accumulation occurred at the littoral end point of t
Authors
Jennifer L. Miselis, Joseph W. Long, P. Soupy Dalyander, James G. Flocks, Noreen A. Buster, Rangley C. Mickey
Non-USGS Publications**
Long, J. W., and H. T. Özkan-Haller, 2009, Low-frequency characteristics of wave group–forced vortices, J. Geophys. Res., 114, C08004, doi:10.1029/2008JC004894.
Scott, C.P., Cox, D.T., Maddux, T.B., and Long, J.W., 2005, Large-scale laboratory observations of turbulence on a fixed barred beach: Measurement Science and Technology, v. 16, p. 1903, doi: 10.1088/0957-0233/16/10/004.
Long, J. W., and H. T. Özkan-Haller, 2005, Offshore controls on nearshore rip currents, J. Geophys. Res., 110, C12007, doi:10.1029/2005JC003018.
**Disclaimer: The views expressed in Non-USGS publications are those of the author and do not represent the views of the USGS, Department of the Interior, or the U.S. Government.