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Elevation of marsh units in eastern Long Island salt marsh complex, New York (ver. 2.0, March 2024)

Dates

Publication Date
Time Period
2020
Revision
2024-03-12

Citation

Welk, R.J., Ackerman, K.V., Defne, Z., and Ganju, N.K., 2020, Coastal wetlands of eastern Long Island, New York (ver. 2.0, March 2024): U.S. Geological Survey data release, https://doi.org/10.5066/P91H426U.

Summary

This data release contains coastal wetland synthesis products for the geographic region of eastern Long Island, New York, including the north and south forks, Gardiners Island and Fishers Island. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and mean tidal range, are calculated for smaller units delineated from a Digital Elevation Model, providing the spatial variability of physical factors that influence wetland health. Through scientific efforts initiated with the Hurricane Sandy Science Plan, the U.S. Geological Survey has been expanding national assessment of coastal change hazards and forecast products to coastal wetlands with the intent of providing Federal, State, and local managers [...]

Contacts

Attached Files

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elev_ELI_browse.png
“Elevation of marsh units overlaying ESRI basemap”
thumbnail 222.43 KB image/png
Revision_History.txt
“Revision history.”
1.03 KB text/plain
Shapefile: mu_elev_ELI.zip
mu_elev_ELI.sld 7.09 KB
mu_elev_ELI.CPG 5 Bytes
mu_elev_ELI.dbf 400.78 KB
mu_elev_ELI.prj 425 Bytes
mu_elev_ELI.sbn 26.61 KB
mu_elev_ELI.sbx 1.12 KB
mu_elev_ELI.shp 30.54 MB
mu_elev_ELI.shx 21.6 KB

Purpose

The purpose of this shapefile is to calculate mean elevation for each marsh unit and its vegetated component. Analysis of marsh elevation is part of a comprehensive assessment to identify the factors and their weights in determining the vulnerability and resiliency of salt marshes. Elevation distribution in the eastern Long Island salt marsh complex is given in terms of mean elevation of conceptual marsh units. The elevation data is based on the 1-meter resolution National Elevation Database (NED).

Additional Information

Shapefile Extension

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