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Conceptual marsh units of eastern Long Island salt marsh complex, New York

Dates

Publication Date
Time Period
2020

Citation

Welk, R.J., Defne, Z., and Ganju, N.K., 2020, Coastal wetlands of eastern Long Island, New York: 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

Point of Contact :
Robert J Welk
Originator :
Robert J Welk, Zafer Defne, Neil Kamal Ganju
Metadata Contact :
Robert J Welk
Publisher :
U.S. Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

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

Shapefile: CMU_ELI.zip
CMU_ELI.cpg 5 Bytes
CMU_ELI.prj 425 Bytes
CMU_ELI.sbx 1.83 KB
CMU_ELI.sbn 51.03 KB
CMU_ELI.shx 41.3 KB
CMU_ELI.dbf 561.61 KB
CMU_ELI.shp 72.39 MB
CMU_ELI_browse.png thumbnail 217.26 KB
CMU_ELI.sld 9.15 KB

Purpose

These polygons were created to be used in evaluating the spatial variation of the response and resiliency of the salt marsh complex based on consistently defined marsh units while facilitating a better understanding of the relative importance of the processes involved. The salt marsh complex of eastern Long Island was delineated to smaller, conceptual marsh units by the geoprocessing of surface elevation data. Flow accumulation based on the relative elevation of each location is used to determine the ridge lines that separate each marsh unit while the surface slope is used to automatically assign each unit a drainage point, where water is expected to drain through.

Additional Information

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