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Unvegetated to vegetated ratio 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

Click on title to download individual files attached to this item.

UVVR_ELI_browse.png
“UVVR overlaying ESRI basemap”
thumbnail 222.57 KB image/png
Revision_History.txt
“Revision history.”
1.03 KB text/plain
Shapefile: mu_UVVR_ELI.zip
mu_UVVR_ELI.sld 9.37 KB
mu_UVVR_ELI.CPG 5 Bytes
mu_UVVR_ELI.dbf 196.38 KB
mu_UVVR_ELI.prj 425 Bytes
mu_UVVR_ELI.sbn 26.61 KB
mu_UVVR_ELI.sbx 1.12 KB
mu_UVVR_ELI.shp 30.54 MB
mu_UVVR_ELI.shx 21.6 KB

Purpose

The purpose of this shapefile is to calculate the ratio of unvegetated area to vegetated area (UVVR) in each marsh unit. Analysis of unvegetated to vegetated marsh ratio is part of a comprehensive assessment to identify the factors and their weights in determining the vulnerability and resiliency of salt marshes. An unvegetated area to vegetated area ratio was defined as a potential indicator of the current state of a salt marsh unit. UVVR was calculated based on U.S. Department of Agriculture National Agriculture Imagery Program (NAIP) 1-meter resolution imagery.

Additional Information

Shapefile Extension

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