Stratigraphy of Back-Barrier Coastal Dunes, Northern North Carolina and Southern Virginia

Havholm, Karen G.; Ames, Dorothea; Whittecar, G. Richard; Wenell, B A; Riggs, Stanley R.; Jol, Harry M.; Berger, Glenn W.; Holmes, Mary Anne

doi:10.2112/03503a2.1

Cited by 49 publications

(43 citation statements)

References 25 publications

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“…This conclusion is also supported by the sand transport rose for 1980-1991 (see Fig. 1 by Havholm et al, 2004).…”

Section: The Jockey's Ridge Sand Dune Fieldsupporting

confidence: 60%

“…The results of recent ground penetrating radar surveys revealed that this was not the first time that forests were overtaken by dunes in this area (Havholm et al, 2004). Two layers of soil were observed within the dune that indicate the presence of forested landscape around A.D. 1000 that was overtaken by sand dunes by A.D. 1260.…”

Section: Discussionmentioning

confidence: 77%

“…Apparently, the overall direction of dune migration to the SW is not dictated by the long-term mean wind orientation (winds from the SE). Rather, as shown by the sand transport rose presented by Havholm et al (2004), the higher frequency of stronger winds from NE (see also USACE FRF, 2004) lead to the prevailing SW direction of the potential sand transport. In addition, shortterm changes may show up in any particular survey if the morphology captured was strongly influenced by a recent storm.…”

Section: Resultsmentioning

confidence: 96%

“…Transverse crescentic dunes form when there is an abundant supply of sand and a constant wind direction, a situation that was characteristic for the Nags Head area during the first half of the 1900s. As the sand supply is reduced, transformation of the dunes into parabolic shape begins to take place, a process that has been documented for numerous locations (Havholm et al, 2004), including the False Cape dunes in Virginia (Hennigar, 1977). The east dune started to show the properties of a sandstarved dune with a parabolic shape, but the stabilization fences, installed to slow down its migration towards the Soundside Road, are probably contributing to its recent growth in elevation.…”

Section: Discussionmentioning

confidence: 94%

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Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina

Mitášová

Overton

Harmon³

2005

Geomorphology

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“…This conclusion is also supported by the sand transport rose for 1980-1991 (see Fig. 1 by Havholm et al, 2004).…”

Section: The Jockey's Ridge Sand Dune Fieldsupporting

confidence: 60%

Section: Discussionmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 96%

Section: Discussionmentioning

confidence: 94%

See 2 more Smart Citations

Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina

Mitášová

Overton

Harmon³

2005

Geomorphology

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“…It will then be possible to determine the control measures necessary to decrease dune erosion and contribute to the establishment of a sustainable management plan in the Ebro Delta (Sánchez et al, 2004). An understanding of dune history can assist management decisions of coastal dune lands by national and state park organisations, municipalities, and private landowners (Havholm et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Internal structure of the aeolian sand dunes of El Fangar spit, Ebro Delta (Tarragona, Spain)

et al. 2009

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The effects of interdune vegetation changes on eolian dune field evolution: a numerical‐modeling case study at Jockey's Ridge, North Carolina, USA

Pelletier

Mitášová

Harmon

et al. 2009

Earth Surf Processes Landf

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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(Geology, 23, : 1107(Geology, 23, -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. Figure 8. Illustration of the effect of sand redistribution on subsequent dune migration rates. (A) Shaded-relief map of elevations input into the model immediately following sand redistribution at t = 0. Sand was removed from slip faces and transported by a characteristic relocation distance upwind from the peak. (B) Plot of the relative migration rate following sand redistribution as a function of the relocation distance, illustrating that the greatest reduction in migrations rates occurs for sand redistributed to the crestline.

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Stratigraphy of Back-Barrier Coastal Dunes, Northern North Carolina and Southern Virginia

Cited by 49 publications

References 25 publications

Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina

Geospatial analysis of a coastal sand dune field evolution: Jockey's Ridge, North Carolina

Internal structure of the aeolian sand dunes of El Fangar spit, Ebro Delta (Tarragona, Spain)

The effects of interdune vegetation changes on eolian dune field evolution: a numerical‐modeling case study at Jockey's Ridge, North Carolina, USA

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