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shoreline, inletLines: Shoreline polygons and tidal inlet delineations: Assawoman Island, VA, 2014

Dates

Publication Date
Start Date
2013-11
End Date
2014-06

Citation

Sturdivant, E.J., Zeigler, S.L., Gutierrez, B.T., and Weber, K.M., 2019, Barrier island geomorphology and shorebird habitat metrics–Sixteen sites on the U.S. Atlantic Coast, 2013–2014: U.S. Geological Survey data release, https://doi.org/10.5066/P9V7F6UX.

Summary

Understanding how sea-level rise will affect coastal landforms and the species and habitats they support is critical for crafting approaches that balance the needs of humans and native species. Given this increasing need to forecast sea-level rise effects on barrier islands in the near and long terms, we are developing Bayesian networks to evaluate and to forecast the cascading effects of sea-level rise on shoreline change, barrier island state, and piping plover habitat availability. We use publicly available data products, such as lidar, orthophotography, and geomorphic feature sets derived from those, to extract metrics of barrier island characteristics at consistent sampling distances. The metrics are then incorporated into predictive [...]

Contacts

Attached Files

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assa14_inletLines.cpg 5 Bytes text/plain
assa14_inletLines.dbf 146 Bytes application/unknown
assa14_inletLines.prj 424 Bytes text/plain
assa14_inletLines.sbn 180 Bytes x-gis/x-shapefile
assa14_inletLines.sbx 124 Bytes x-gis/x-shapefile
assa14_inletLines.shp 468 Bytes x-gis/x-shapefile
assa14_inletLines.shx 132 Bytes x-gis/x-shapefile
shoreline_asis_browse.png
“Example shoreline polygon (blue) and inlet delineation (red). This example is...”
thumbnail 265.98 KB image/png
Shapefile: assa14_shoreline.zip
assa14_shoreline.cpg 5 Bytes
assa14_shoreline.prj 424 Bytes
assa14_shoreline.sbn 324 Bytes
assa14_shoreline.sbx 132 Bytes
assa14_shoreline.shp 198.66 KB
assa14_shoreline.shx 268 Bytes
assa14_shoreline.dbf 486 Bytes

Purpose

The shoreline polygons (assa14_shoreline.shp) are a generalized delineation of the mean high water (MHW) position on the seaward face of the barrier and mean tidal level (MTL, average of MHW and mean low water) position on the inland face. They delineate the shoreline for the purposes of this study. These polygons were used to convert the transects to 5-m points and to measure island width, distance to inlet from each transect, and position of the shoreline (see larger work). In addition, the inlet delineation polylines (assa14_inletLines.shp) use single straight line segments to roughly locate each side of tidal inlets for the barrier study area. These lines were used (1) to designate the transition between ocean-facing and land-facing sides of the barrier and (2) to measure the distance to tidal inlet in the 5-m points dataset (see larger work). They were created manually to cross the MHW contour line on each side of a tidal inlet within the study area.

Additional Information

Shapefile Extension

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