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Conceptual marsh units of Blackwater salt marsh complex, Chesapeake Bay, Maryland

Dates

Publication Date

Citation

Ackerman, K.V., Defne, Z., and Ganju, N.K., 2021, Coastal wetlands of the Blackwater region, Chesapeake Bay, Maryland: U.S. Geological Survey data release, https://doi.org/10.5066/P9M7H6XG.

Summary

This data release contains coastal wetland synthesis products for the geographic region of Blackwater, Chesapeake Bay, Maryland. Metrics for resiliency, including unvegetated to vegetated ratio (UVVR), marsh elevation, and others, 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 [...]

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Attached Files

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CMU_BW_Browse.png
“Conceptual marsh units overlaying Esri basemap”
thumbnail 1.4 MB image/png
Shapefile: CMU_BW.zip
CMU_BW.CPG 5 Bytes
CMU_BW.dbf 5.08 MB
CMU_BW.prj 425 Bytes
CMU_BW.sbn 174.12 KB
CMU_BW.sbx 12.18 KB
CMU_BW.shp 849.76 MB
CMU_BW.shx 130.97 KB
CMU_BW.sld 6.42 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 the Blackwater region 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

Shapefile Extension

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