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  4. Unvegetated to vegetated ratio of marsh units in Chesapeake Bay salt marshes

Unvegetated to vegetated ratio of marsh units in Chesapeake Bay salt marshes

Dates

Publication Date

Citation

Ackerman, K.V., Defne, Z., and Ganju, N.K., 2022, Geospatial characterization of salt marshes in Chesapeake Bay: U.S. Geological Survey data release, https://doi.org/10.5066/P997EJYB.

Summary

This data release contains coastal wetland synthesis products for Chesapeake Bay. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and tidal range are calculated for smaller units delineated from a digital elevation model, providing the spatial variability of physical factors that influence wetland health. 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 with tools to estimate the vulnerability and ecosystem service potential of these wetlands. For this purpose, the response and resilience of coastal wetlands to physical factors need to be assessed [...]

Contacts

Point of Contact :
Kate V Ackerman
Author :
Kate V Ackerman, Zafer Defne, Neil Kamal Ganju
Data Owner :
Woods Hole Coastal and Marine Science Center
USGS Program :
Coastal and Marine Hazards and Resources Program
Publisher :
United States Geological Survey
Distributor :
U.S. Geological Survey - ScienceBase
SDC Data Owner :
Woods Hole Coastal and Marine Science Center
USGS Mission Area :
Natural Hazards

Attached Files

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CB_regions.png
“Map of analysis regions” 		thumbnail 931.05 KB image/png
UVVR_CB_Browse.png
“UVVR of Chesapeake Bay marsh units.” 		thumbnail 4.69 MB image/png
Shapefile: mu_UVVR_CB.zip
mu_UVVR_CB.xml
Original FGDC Metadata
View 		47.2 KB
mu_UVVR_CB.cpg 5 Bytes
mu_UVVR_CB.dbf 3.46 MB
mu_UVVR_CB.prj 425 Bytes
mu_UVVR_CB.sbn 439.87 KB
mu_UVVR_CB.sbx 16.43 KB
mu_UVVR_CB.shp 311.78 MB
mu_UVVR_CB.shx 363.04 KB
mu_UVVR_CB.sld 9.36 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) 0.6-meter and 1.0-meter resolution imagery (and Worldview-2 1.85-meter resolution imagery for the Aberdeen Proving Ground area (region CB08A)).
UVVR of Chesapeake Bay marsh units.
UVVR of Chesapeake Bay marsh units.

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Additional Information

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