@article{gharagozlou_dietrich_massey_anderson_gorski_overton_2021, title={Formation of a barrier island breach and its contributions to lagoonal circulation}, volume={262}, ISSN={["1096-0015"]}, url={http://dx.doi.org/10.1016/j.ecss.2021.107593}, DOI={10.1016/j.ecss.2021.107593}, abstractNote={Barrier islands are a primary coastal defense and often experience erosion during storms. When they fail due to storm-induced breaching, there can be significant changes to the small- and large-scale hydrodynamics and morphodynamics of the region. In this study, we explore the formation of a breach on Hatteras Island, North Carolina, during Isabel (2003) and the subsequent flooding into Pamlico Sound. Two-way coupling of high-fidelity, high-resolution numerical models for coastal erosion and flooding enables a better understanding of the formation of the breach, as well as scenarios of the breach’s effects on the circulation in the region. The breach connecting the ocean to the sound formed during the day of landfall. It is shown that, during the storm, overwash and inundation from the ocean led to deterioration of the beach and dunes, and then after the storm, the creation of channels through the island was sensitive to elevated water levels in the lagoon. Then flooding scenarios are considered in which the ground surface of the hydrodynamic model was (a) static, updated with the (b) pre- and post-storm observations, and updated dynamically with (c) erosion model predictions and (d) erosion model predictions with elevated lagoon-side water levels. The model results show that the breach has region-scale effects on flooding that extend 10 to 13 km into the lagoon, increasing the local water levels by as much as 1 . 5 m . These results have implications for similar island-lagoon systems threatened by storms. • A storm-induced barrier-island breach is predicted with high-resolution models. • Ocean-side overwash and inundation led to beach and dune erosion during the storm. • Channel formation is sensitive to elevated sound-side water levels after the storm. • Erosion and circulation predictions are coupled to assess effects on region scales. • Breach allows flows 10–13 km into the lagoon, increases water depths by 1.5 m.}, journal={ESTUARINE COASTAL AND SHELF SCIENCE}, publisher={Elsevier BV}, author={Gharagozlou, Alireza and Dietrich, J. Casey and Massey, T. Chris and Anderson, Dylan L. and Gorski, Jessica F. and Overton, Margery F.}, year={2021}, month={Nov} }
 @article{velasquez-montoya_sciaudone_harrison_overton_2021, title={Land cover changes on a barrier island: Yearly changes, storm effects, and recovery periods}, volume={135}, ISSN={["1873-7730"]}, DOI={10.1016/j.apgeog.2021.102557}, abstractNote={Ecosystems on barrier islands provide socio-ecological services to terrestrial and aquatic endangered species, as well as human inhabitants. The management of these coastal ecosystems is challenged by changes in annual and storm time scales driven by atmospheric, oceanographic, geologic, and human processes. Thus, the need for data and methods to accurately quantify and assess ecosystem and land cover evolution to inform stakeholders is on the rise. A dataset of high-resolution color infrared images of a U.S. National Wildlife Refuge is used to quantify annual land cover changes at a barrier island scale and to identify the effects of hurricanes and their recovery periods. Geospatial analysis and change matrices depict the interconnection between 13 land cover classes. Vegetation growth over regions of bare sand formed by storms leads to the creation of successional habitats, while the loss of bare sand dune to beach, and beach to water are indicators of erosional processes. Storms passing along the ocean and sound side of a barrier island result in different land cover changes that can last anywhere from 4 to more than 7 years, respectively. Management practices for coastal regions and the presence of infrastructure partially control the expansion of marshes, bare sand, maritime brush, and dunes.}, journal={APPLIED GEOGRAPHY}, author={Velasquez-Montoya, Liliana and Sciaudone, Elizabeth J. and Harrison, Rebecca B. and Overton, Margery}, year={2021}, month={Oct} }
 @article{velasquez-montoya_sciaudone_smyre_overton_2021, title={Vulnerability Indicators for Coastal Roadways Based on Barrier Island Morphology and Shoreline Change Predictions}, volume={22}, ISSN={["1527-6996"]}, DOI={10.1061/(ASCE)NH.1527-6996.0000441}, abstractNote={AbstractCoastal roadways are vulnerable to changes in landscape that occur at variable spatiotemporal scales. In particular, highways on barrier islands suffer the consequences of the combined acti...}, number={2}, journal={NATURAL HAZARDS REVIEW}, author={Velasquez-Montoya, Liliana and Sciaudone, Elizabeth J. and Smyre, Elizabeth and Overton, Margery F.}, year={2021}, month={May} }
 @article{velasquez-montoya_overton_sciaudone_2020, title={Natural and anthropogenic-induced changes in a tidal inlet: Morphological evolution of Oregon Inlet}, volume={350}, ISSN={["1872-695X"]}, DOI={10.1016/j.geomorph.2019.106871}, abstractNote={Natural processes driving the dynamics of tidal inlets have been studied in length, however, as human influence in the coastal environment persists, there is a need to comprehend how both natural and human-induced processes drive different aspects of tidal inlet morphological evolution. An effort to understand the combined effects of natural and anthropogenic-induced processes in a tidal inlet is pursued by studying Oregon Inlet, considered one of the most dynamic inlets in the Outer Banks of North Carolina, USA. The temporal and spatial scales of the anthropogenic processes driving the morphological evolution of this tidal inlet are studied by means of remotely sensed data and in-situ observations gathered from 2005 until 2015. Effects of natural process that cannot be gathered from observations are studied via a morphological model based on Delft3D. Evolutional trends include the cyclical response of the main channel of the inlet to dredging, a 13° northward rotation of the main channel, and frequent sediment transport reversal in the southern shoulder. Simulations indicate a net sediment transport rate into the inlet of 205,000 m3/yr. Tidal currents are responsible for 55% of such transport, while waves account for the remaining 45%. After a 2-year non-dredging modeling scenario, sediments from the subaqueous spit form a detached shoal in the north side of the flood delta and the main channel remains open branching into two dominant channels. Observations and model results indicate that Oregon Inlet has been in a state of stable equilibrium in the past decade. Natural and human-induced processes contribute to such equilibrium. This study exemplifies the decadal behavior of a tidal inlet influenced by natural processes, infrastructure, and dredging.}, journal={GEOMORPHOLOGY}, author={Velasquez-Montoya, Liliana and Overton, Margery F. and Sciaudone, Elizabeth J.}, year={2020}, month={Feb} }
 @article{gharagozlou_dietrich_karanci_luettich_overton_2020, title={Storm-driven erosion and inundation of barrier islands from dune-to region-scales}, volume={158}, ISSN={["1872-7379"]}, url={http://dx.doi.org/10.1016/j.coastaleng.2020.103674}, DOI={10.1016/j.coastaleng.2020.103674}, abstractNote={Barrier islands are susceptible to erosion, overwash, and breaching during intense storms. However, these processes are not represented typically in large-domain models for storm surge and coastal inundation. In this study, we explore the requirements for bridging the gap between dune-scale morphodynamic and region-scale flooding models. A high-resolution XBeach model is developed to represent the morphodynamics during Hurricane Isabel (2003) in the North Carolina (NC) Outer Banks. The model domain is extended to more than 30km of Hatteras Island and is thus larger than in previous studies. The predicted dune erosion is in good agreement with post-storm observed topography, and an ‘‘excellent’’ Skill Score of 0.59 is obtained on this large domain. Sensitivity studies show the morphodynamic model accuracy is decreased as the mesh spacing is coarsened in the cross-shore direction, but the results are less sensitive to the alongshore resolution. A new metric to assess model skill, Water Overpassing Area (WOA), is introduced to account for the available flow pathway over the dune crest. Together, these findings allow for upscaled parameterizations of erosion in larger-domain models. The updated topography, obtained from XBeach prediction, is applied in a region-scale flooding model, thus allowing for enhanced flooding predictions in communities along the Outer Banks. It is found that, even using a fixed topography in region-scale model, the flooding predictions are improved significantly when post-storm topography from XBeach is implemented. These findings can be generalized to similar barrier island systems, which are common along the U.S. Gulf and Atlantic coasts.}, journal={COASTAL ENGINEERING}, author={Gharagozlou, Alireza and Dietrich, Joel Casey and Karanci, Ayse and Luettich, Richard A. and Overton, Margery F.}, year={2020}, month={Jun} }
 @article{karanci_velasquez-montoya_paniagua-arroyave_adams_overton_2018, title={Beach Management Practices and Occupation Dynamics: An Agent-Based Modeling Study for the Coastal Town of Nags Head, NC, USA}, volume={24}, ISBN={["978-3-319-58303-7"]}, ISSN={["2211-0585"]}, DOI={10.1007/978-3-319-58304-4_19}, abstractNote={The analysis of interactions between human and natural systems is crucial for sound beach management practices. Those interactions can be simulated via agent-based modeling. Nevertheless, more work is needed to identify and understand model capabilities prior to societal implementations. This study presents the application of an agent-based model in the coastal town of Nags Head, NC USA. The case study focuses on the influence of storm arrival patterns and soft-engineering design alternatives on town occupation dynamics. The agent-based model consists of three interactive sub-models: (1) Natural Processes and Coastal Landforms, (2) Beach Management, and (3) Household Decisions. Modeling results indicate that sea level rise will exacerbate storm damages and could lead to a declining town population. In addition, analysis of occupancy with soft-engineering design alternatives suggests that population in Nags Head maximizes when economic benefits and protection from both, dunes and beaches, are balanced. Our results serve to exemplify the usage and capabilities of an agent-based model for beach management practices in coastal towns subjected to storms and sea level rise. Application of the model provides valuable insights of the system that can ultimately be used by decision-makers and town managers.}, journal={BEACH MANAGEMENT TOOLS - CONCEPTS, METHODOLOGIES AND CASE STUDIES}, author={Karanci, Ayse and Velasquez-Montoya, Liliana and Paniagua-Arroyave, Juan F. and Adams, Peter N. and Overton, Margery F.}, year={2018}, pages={373–395} }
 @article{velasquez montoya_sciaudone_mitasova_overton_2018, title={Observation and modeling of the evolution of an ephemeral storm-induced inlet: Pea Island Breach, North Carolina, USA}, volume={156}, ISSN={0278-4343}, url={http://dx.doi.org/10.1016/j.csr.2018.02.002}, DOI={10.1016/j.csr.2018.02.002}, abstractNote={The Outer Banks of North Carolina is a wave-dominated barrier island system that has experienced the opening and closure of numerous inlets in the last four centuries. The most recent of those inlets formed after the breaching of Pea Island during Hurricane Irene in 2011. The Pea Island Breach experienced a rapid evolution including episodic curvature of the main channel, rotation of the ebb channel, shoaling, widening by Hurricane Sandy in 2012, and finally closing before the summer of 2013. Studying the life cycle of Pea Island Breach contributes to understanding the behavior of ephemeral inlets in breaching-prone regions. This topic has gained relevance due to rising sea levels, a phenomenon that increases the chances of ephemeral inlet formation during extreme events. This study explores the spatiotemporal effects of tides, waves, and storms on flow velocities and morphology of the breach by means of remotely sensed data, geospatial metrics, and a numerical model. The combined use of observations and results from modeling experiments allowed building a conceptual model to explain the life cycle of Pea Island Breach. Wave seasonality dominated the morphological evolution of the inlet by controlling the magnitude and direction of the longshore current that continuously built transient spits at both sides of the breach. Sensitivity analysis to external forcings indicates that ocean waves can modify water levels and velocities in the back barrier. Sound-side storm surge regulates overall growth rate, duration, and decay of peak water levels entering the inlet during extreme events.}, journal={Continental Shelf Research}, publisher={Elsevier BV}, author={Velasquez Montoya, Liliana and Sciaudone, Elizabeth J. and Mitasova, Helena and Overton, Margery F.}, year={2018}, month={Mar}, pages={55–69} }
 @article{sciaudone_velasquez-montoya_smyre_overton_2016, title={Spatial and temporal variability in dune field: Pea Island, North Carolina}, volume={84}, number={2}, journal={Shore & Beach, Coastal Observations}, author={Sciaudone, E.J. and Velasquez-Montoya, L. and Smyre, E.A. and Overton, M.F.}, year={2016}, pages={49–58} }
 @article{overton_2014, title={Guest Editorial: Coastal Dunes Essential to a Resilient Coast}, volume={82}, number={4}, journal={Shore & Beach}, author={Overton, M.}, year={2014} }
 @article{thakur_tateosian_mitasova_hardin_overton_2013, title={SUMMARY VISUALIZATIONS FOR COASTAL SPATIAL-TEMPORAL DYNAMICS}, volume={3}, ISSN={["2152-5099"]}, DOI={10.1615/int.j.uncertaintyquantification.2012003969}, abstractNote={Digital scans of dynamic terrains such as coastal regions are now being gathered at high spatial and temporal resolution. Although standard tools based on geographic information systems (GIS) are indispensable for analyzing geospatial data, they have limited support to display time-dependent changes in data and information such as statistical distributions and uncertainty in data. We present a set of techniques for visually summarizing the dynamics of coastal dunes. We visualize summary statistics of important data attributes and risk or vulnerability indices as functions of both spatial and temporal dimensions in our data and represent uncertainty in the data set. We apply standard techniques, the space time cube and clustering, in novel ways to the domain of geomorphology. We combine surface-mapping and imagery with summary visualizations to retain important geographical context in the visualizations and reduce clutter due to direct plotting of statistical data in displays of geospatial information. We also address some issues pertaining to visualization of summary statistics for geographical regions at varying scales. We demonstrate visualization tools on time series of elevation models from the Outer Banks of North Carolina and observe temporal-spatial trends therein.}, number={3}, journal={INTERNATIONAL JOURNAL FOR UNCERTAINTY QUANTIFICATION}, author={Thakur, Sidharth and Tateosian, Laura and Mitasova, Helena and Hardin, Eric and Overton, Margery}, year={2013}, pages={241–253} }
 @article{hardin_kurum_mitasova_overton_2012, title={Least cost path extraction of topographic features for storm impact scale mapping}, volume={28}, number={4}, journal={Journal of Coastal Research}, author={Hardin, E. and Kurum, M. O. and Mitasova, H. and Overton, M. F.}, year={2012}, pages={970–978} }
 @article{mitasova_harmon_weaver_lyons_overton_2012, title={Scientific visualization of landscapes and landforms}, volume={137}, ISSN={["1872-695X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-82455187995&partnerID=MN8TOARS}, DOI={10.1016/j.geomorph.2010.09.033}, abstractNote={Scientific visualization of geospatial data provides highly effective tools for analysis and communication of information about the land surface and its features, properties, and temporal evolution. Whereas single-surface visualization of landscapes is now routinely used in presentation of Earth surface data, interactive 3D visualization based upon multiple elevation surfaces and cutting planes is gaining recognition as a powerful tool for analyzing landscape structure based on multiple return Light Detection and Ranging (LiDAR) data. This approach also provides valuable insights into land surface changes captured by multi-temporal elevation models. Thus, animations using 2D images and 3D views are becoming essential for communicating results of landscape monitoring and computer simulations of Earth processes. Multiple surfaces and 3D animations are also used to introduce novel concepts for visual analysis of terrain models derived from time-series of LiDAR data using multi-year core and envelope surfaces. Analysis of terrain evolution using voxel models and visualization of contour evolution using isosurfaces has potential for unique insights into geometric properties of rapidly evolving coastal landscapes. In addition to visualization on desktop computers, the coupling of GIS with new types of graphics hardware systems provides opportunities for cutting-edge applications of visualization for geomorphological research. These systems include tangible environments that facilitate intuitive 3D perception, interaction and collaboration. Application of the presented visualization techniques as supporting tools for analyses of landform evolution using airborne LiDAR data and open source geospatial software is illustrated by two case studies from North Carolina, USA.}, number={1}, journal={GEOMORPHOLOGY}, author={Mitasova, Helena and Harmon, Russell S. and Weaver, Katherine J. and Lyons, Nathan J. and Overton, Margery F.}, year={2012}, month={Jan}, pages={122–137} }
 @inbook{mitasova_hardin_starek_harmon_overton_2011, place={Redlands, CA}, title={Landscape dynamics from LiDAR data time series}, booktitle={Geomorphometry 2011}, author={Mitasova, H and Hardin, E and Starek, MJ and Harmon, RS and Overton, MF}, editor={Hengl, T and Evans, IS and Wilson, JP and Gould, MEditors}, year={2011}, pages={3–6} }
 @article{starek_mitasova_hardin_weaver_overton_harmon_2011, title={Modeling and analysis of landscape evolution using airborne, terrestrial, and laboratory laser scanning}, volume={7}, ISSN={["1553-040X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-84858779393&partnerID=MN8TOARS}, DOI={10.1130/ges00699.1}, abstractNote={Current laser scanning (Lidar, light detection and ranging) technologies span a wide range of survey extent and resolutions, from regional airborne Lidar mapping and terrestrial Lidar field surveys to laboratory systems utilizing indoor three-dimensional (3D) laser scanners. Proliferation in Lidar technology and data collection enables new approaches for monitoring and analysis of landscape evolution. For example, repeat Lidar surveys that generate a time series of point cloud data provide an opportunity to transition from traditional, static representations of topography to terrain abstraction as a 3D dynamic layer. Three case studies are presented to illustrate novel techniques for landscape evolution analysis based on time series of Lidar data: (1) application of multiyear airborne Lidar surveys to a study of a dynamic coastal region, where the change is driven by eolian sediment transport, wave-induced beach erosion, and human intervention; (2) monitoring of vegetation growth and the impact of landscape structure on overland flow in an agricultural field using terrestrial laser scanning; and (3) investigation of landscape design impacts on overland water flow and other physical processes using a tangible geospatial modeling system. The presented studies demonstrate new insights into landscape evolution in different environments that can be gained from Lidar scanning spanning 1.0–0.001 m resolutions with geographic information system analysis capabilities.}, number={6}, journal={GEOSPHERE}, author={Starek, Michael J. and Mitasova, Helena and Hardin, Eric and Weaver, Katherine and Overton, Margery and Harmon, Russell S.}, year={2011}, month={Dec}, pages={1340–1356} }
 @article{mitasova_hardin_overton_kurum_2010, title={Geospatial analysis of vulnerable beach-foredune systems from decadal time series of lidar data}, volume={14}, ISSN={1400-0350 1874-7841}, url={http://dx.doi.org/10.1007/s11852-010-0088-1}, DOI={10.1007/s11852-010-0088-1}, number={3}, journal={Journal of Coastal Conservation}, publisher={Springer Science and Business Media LLC}, author={Mitasova, Helena and Hardin, Eric and Overton, Margery F. and Kurum, Mustafa Onur}, year={2010}, month={Jan}, pages={161–172} }
 @book{engagement_2010, title={Integrating learning, discovery, and engagement through the scholarship of engagement}, journal={Technical Report- Not held in TRLN member libraries}, institution={Raleigh, NC: NCSU Office of Extension, Engagement, and Economic Development}, author={Engagement, Task Force}, year={2010} }
 @article{ewing_stauble_work_edge_loeffler_kaihatu_overton_waters_suzuki_dean_et al._2009, title={Field investigation of Hurricane Ike impacts to the upper Texas coast}, volume={77}, number={2}, journal={Shore and Beach}, author={Ewing, L. and Stauble, D. and Work, P. and Edge, B. and Loeffler, M. and Kaihatu, J. and Overton, M. and Waters, J. and Suzuki, K and Dean, R. and et al.}, year={2009} }
 @article{mitasova_overton_recalde_bernstein_freeman_2009, title={Raster-Based Analysis of Coastal Terrain Dynamics from Multitemporal Lidar Data}, volume={25}, ISSN={["1551-5036"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-66449138133&partnerID=MN8TOARS}, DOI={10.2112/07-0976.1}, abstractNote={Abstract Multitemporal sets of lidar data provide a unique opportunity to analyze and quantify changes in topography in rapidly evolving landscapes. Methodology for geospatial analyses of lidar data time series was developed to investigate patterns of coastal terrain evolution, including the beach and dune systems. The diverse lidar-point data density, noise, and systematic errors were first quantified, and the results were used to compute a consistent series of high-resolution digital elevation models using spline-based approximation with optimized parameters. Raster-based statistical analysis was applied to the elevation-model time series to derive maps representing multiyear trends in spatial patterns of elevation change, to quantify dynamics at each cell using standard deviation maps, and to extract the core surface below which the elevation has never decreased. The methodology was applied to a North Carolina barrier island that was mapped by a sequence of 13 lidar surveys during the past decade, using several different lidar systems. Assessment of vertical differences between the lidar data sets using stable structures such as a road, was shown to be essential for correct quantification of coastal terrain change and its pattern. The analysis revealed the highly dynamic nature of foredunes, the trend toward inland sand transport, and the impact of anthropogenic sand disposal on that trend.}, number={2}, journal={JOURNAL OF COASTAL RESEARCH}, author={Mitasova, Helena and Overton, Margery F. and Recalde, Juan Jose and Bernstein, David J. and Freeman, Christopher W.}, year={2009}, month={Mar}, pages={507–514} }
 @article{pelletier_mitasova_overton_harmon_2009, title={The Effects of Interdune Vegetation Changes on Eolian Dune Field Evolution: a numerical modeling case study at Jockey's Ridge, North Carolina, USA}, volume={34}, DOI={http://doi.org/10.1002/esp.1809}, abstractNote={Abstract Changes in vegetation cover within dune fields can play a major role in how dune fields evolve. To better understand the linkage between dune field evolution and interdune vegetation changes, we modified Werner's ( Geology , 23, 1995: 1107–1110) dune field evolution model to account for the stabilizing effects of vegetation. Model results indicate that changes in the density of interdune vegetation strongly influence subsequent trends in the height and area of eolian dunes. We applied the model to interpreting the recent evolution of Jockey's Ridge, North Carolina, where repeat LiDAR surveys and historical aerial photographs and maps provide an unusually detailed record of recent dune field evolution. In the absence of interdune vegetation, the model predicts that dunes at Jockey's Ridge evolve towards taller, more closely‐spaced, barchanoid dunes, with smaller dunes generally migrating faster than larger dunes. Conversely, the establishment of interdune vegetation causes dunes to evolve towards shorter, more widely‐spaced, parabolic forms. These results provide a basis for understanding the increase in dune height at Jockey's Ridge during the early part of the twentieth century, when interdune vegetation was sparse, followed by the decrease in dune height and establishment of parabolic forms from 1953‐present when interdune vegetation density increased. These results provide a conceptual model that may be applicable at other sites with increasing interdune vegetation cover, and they illustrate the power of using numerical modeling to model decadal variations in eolian dune field evolution. We also describe model results designed to test the relative efficacy of alternative strategies for mitigating dune migration and deflation. Installing sand‐trapping fences and/or promoting vegetation growth on the stoss sides of dunes are found to be the most effective strategies for limiting dune advance, but these strategies must be weighed against the desire of many park visitors to maintain the natural state of the dunes. Copyright © 2009 John Wiley & Sons, Ltd.}, number={9}, journal={Earth Surface Processes and Landforms}, publisher={John Wiley & Sons}, author={Pelletier, J. and Mitasova, H. and Overton, M. and Harmon, R}, year={2009}, month={Jul}, pages={1245–1254} }
 @article{pelletier_mitasova_harmon_overton_2009, title={The effects of interdune vegetation changes on eolian dune field evolution: a numerical-modeling case study at Jockey's Ridge, North Carolina, USA}, volume={34}, ISSN={["1096-9837"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-69749085481&partnerID=MN8TOARS}, DOI={10.1002/esp.1809}, abstractNote={Abstract}, number={9}, journal={EARTH SURFACE PROCESSES AND LANDFORMS}, author={Pelletier, Jon D. and Mitasova, Helena and Harmon, Russell S. and Overton, Margery}, year={2009}, month={Jul}, pages={1245–1254} }
 @inproceedings{edge_park_overton_2007, title={Experimental Study of Overwash}, ISBN={9780784409268}, url={http://dx.doi.org/10.1061/40926(239)163}, DOI={10.1061/40926(239)163}, abstractNote={Overwash induced by storm conditions is one mechanism causing coastline change with cross-shore erosion and deposition. Many field studies have been conducted but laboratory experiments are few. This experimental study was conducted for estimation of eroded sand volume by overwash. The experiments were conducted at two different wave heights and four different wave periods in two different slopes of beach face for regular and irregular waves. The experiments were done in a 2D wave tank on mid-scale at Texas A&M University. The measured data from 32 different tests were used to analyze the characteristics of overwash.}, booktitle={Coastal Sediments '07}, publisher={American Society of Civil Engineers}, author={Edge, Billy L. and Park, Young Hyun and Overton, Margery}, year={2007}, month={May} }
 @article{mitasova_overton_harmon_2005, title={Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina}, volume={72}, ISSN={["1872-695X"]}, url={http://www.scopus.com/inward/record.url?eid=2-s2.0-28744438601&partnerID=MN8TOARS}, DOI={10.1016/j.geomorph.2005.06.001}, abstractNote={Preservation and effective management of highly dynamic coastal features located in areas under development pressures requires in-depth understanding of their evolution. Modern geospatial technologies such as lidar, real time kinematic GPS, and three-dimensional GIS provide tools for efficient acquisition of high resolution data, geospatial analysis, feature extraction, and quantification of change. These techniques were applied to the Jockey's Ridge, North Carolina, the largest active dune field on the east coast of the United States, with the goal to quantify its deflation and rapid horizontal migration. Digitized contours, photogrammetric, lidar and GPS point data were used to compute a multitemporal elevation model of the dune field capturing its evolution for the period of 1974– 2004. In addition, peak elevation data were available for 1915 and 1953. Analysis revealed possible rapid growth of the dune complex between 1915–1953, followed by a slower rate of deflation that continues today. The main dune peak grew from 20.1 m in 1915 to 41.8 m in 1953 and has since eroded to 21.9 m in 2004. Two of the smaller peaks within the dune complex have recently gained elevation, approaching the current height of the main dune. Steady annual rate of main peak elevation loss since 1953 suggests that increase in the number of visitors after the park was established in 1974 had little effect on the rate of dune deflation. Horizontal dune migration of 3–6 m/yr in southerly direction has carried the sand out of the park boundaries and threatened several houses. As a result, the south dune section was removed and the sand was placed at the northern end of the park to serve as a potential source. Sand fencing has been an effective management strategy for both slowing the dune migration and forcing growth in dune elevation. Understanding the causes of the current movements can point to potential solutions and suggest new perspectives on management of the dune as a tourist attraction and as a recreation site, while preserving its unique geomorphic character and dynamic behavior.}, number={1-4}, journal={GEOMORPHOLOGY}, author={Mitasova, H and Overton, M and Harmon, RS}, year={2005}, month={Dec}, pages={204–221} }
 @article{overton_fisher_2004, title={Hurricane Isabel and the NC 12 Hotspots}, volume={72}, number={2}, journal={Shore and Beach}, author={Overton, M.F. and Fisher, J.S.}, year={2004}, pages={30–35} }
 @article{sobsey_perdue_overton_fisher_2003, title={Factors influencing faecal contamination in coastal marinas}, volume={47}, ISSN={["0273-1223"]}, DOI={10.2166/wst.2003.0195}, abstractNote={Recreational pleasure and fishing boats are potential sources of human faecal contamination because the sanitary wastes from boat occupants may be discharged into the surrounding water. The impacts of such faecal contamination from boats is potentially high in marinas where boats are often kept and occupied for varying periods of time. The nature and extent of such faecal contamination from boats in marinas of different design and use is still inadequately understood. In this study the levels of faecal coliform (FC) bacteria were measured in the waters of a confined and an open water marina over a 6 d period encompassing a holiday weekend. Levels of FC rose with increasing occupancy by boats and boaters during the study period and then declined again. FC levels were higher in waters of a confined or basin marina than in waters of an open or unconfined marina. In both confined and open water marinas, FC levels were highest in water samples collected near boats but they also became elevated on occasion in water samples taken a distance of 305 m from boats. Concentrations of FC in marina waters exceeded the standards and guidelines for shell-fishing and primary contact recreation waters. Therefore, greater consideration of human health risks from enteric microbes in marina waters and shellfish is recommended.}, number={3}, journal={WATER SCIENCE AND TECHNOLOGY}, author={Sobsey, MD and Perdue, R and Overton, M and Fisher, J}, year={2003}, pages={199–204} }
 @article{judge_overton_fisher_2003, title={Vulnerability indicators for coastal dunes}, volume={129}, DOI={10.1061/(ASCE)0733-950X(2003)129:6(270)}, abstractNote={This paper describes the development of a new parameter to characterize dune vulnerability to storm-induced erosion. Existing indicators of dune erosion vulnerability are examined, including expected cross-sectional erosion values calculated using storm characteristics. We extract a series of 110 pre- and poststorm profiles at cross-shore transects, spaced at approximately 300 m alongshore on digital terrain models of a North Carolina barrier island. Dune failure and survival are designated based on a percentage of the cross-sectional area eroded—50% or greater erosion indicates failure, less than 50% erosion, survival. Crest height does not prove to be an effective predictor of dune vulnerability. Existing cross-sectional area based parameters show some success in predicting erosion vulnerability. We improve the dune failure and survival prediction success rate using a new parameter, a surrogate moment of inertia, the erosion resistance.}, number={6}, journal={Journal of Waterway, Port, Coastal and Ocean Engineering}, author={Judge, E. K. and Overton, M. F. and Fisher, J. S.}, year={2003}, pages={270–278} }
 @article{judge_overton_2001, title={Remote sensing of barrier island morphology: Evaluation of photogrammetry-derived digital terrain models}, volume={17}, number={1}, journal={Journal of Coastal Research}, author={Judge, E. K. and Overton, M. F.}, year={2001}, pages={207–220} }
 @article{judge_garriga_overton_2000, title={Topographic analysis of dune volume and position, Jockey's Ridge State Park}, volume={68}, number={4}, journal={Shore & Beach}, author={Judge, E. K. and Garriga, C. M. and Overton, M. F.}, year={2000}, pages={19} }
 @inproceedings{joyner_overton_fisher_1999, title={Analysis of the morphology of Oregon Inlet, NC since the construction of the terminal groin}, booktitle={Coastal engineering 1998: Conference proceedings, June 22-26 1998, Falconer Hotel, Copenhagen, Denmark}, publisher={Reston, Va.: American Society of Civil Engineers}, author={Joyner, B. P. and Overton, M. F. and Fisher, J. S.}, year={1999} }
 @article{overton_grenier_judge_fisher_1999, title={Identification and Analysis of Coastal Erosion Hazard Areas: Dare and Brunswick Counties, North Carolina}, volume={28}, journal={Journal of Coastal Research}, author={Overton, M.F. and Grenier, R.R., Jr. and Judge, E.K. and Fisher, J.S.}, year={1999}, pages={69–84} }
 @book{inventory of structures for brunswick and dare counties: final project report_1998, publisher={Raleigh, NC: DEHNR}, year={1998} }
 @inproceedings{overton_fisher_1997, title={Application of 3-D computer modeling using digital photogrammetry to measure shoreline change}, booktitle={Coastal engineering 1996: Proceedings of the twenty-fifth international conference, September 2-6, 1996, The Peabody Hotel, Orlando  1997}, author={Overton, M. F. and Fisher, J. S.}, year={1997} }
 @inproceedings{judge_garriga_overton_1997, title={Dune morphology from photogrammetry-derived digital terrain models}, booktitle={American Geophysical Union Annual Fall Meeting, San Francisco, CA., 1997}, author={Judge, E. K. and Garriga, C. M. and Overton, M. F.}, year={1997} }
 @book{mapping erosion hazard areas in brunswick and dare counties: final project report_1997, publisher={Raleigh, NC: DEHNR}, year={1997} }