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Conceptual marsh units of salt marshes on the Eastern Shore of Virginia

Dates

Publication Date

Citation

Ackerman, K.V., Defne, Z., and Ganju, N.K., 2023, Geospatial characterization of salt marshes on the Eastern Shore of Virginia: U.S. Geological Survey data release, https://doi.org/10.5066/P9E6V0QK.

Summary

This data release contains coastal wetland synthesis products for the Atlantic-facing Eastern Shore of Virginia (the data release for the Chesapeake Bay-facing portion of the Eastern Shore of Virginia is found here: https://doi.org/10.5066/P997EJYB). 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 [...]

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CMU_ESV_Browse.png
“Conceptual marsh units of salt marshes on the Eastern Shore of Virginia.”
thumbnail 1.14 MB image/png
Shapefile: CMU_ESV.zip
CMU_ESV.CPG 5 Bytes
CMU_ESV.dbf 3.88 MB
CMU_ESV.prj 425 Bytes
CMU_ESV.sbn 117.89 KB
CMU_ESV.sbx 3.57 KB
CMU_ESV.shp 749.91 MB
CMU_ESV.shx 98.43 KB
CMU_ESV.sld 9.15 KB

Purpose

These polygons were created to be used in evaluating the spatial variation of the response and resiliency of salt marsh complexes based on consistently defined marsh units while facilitating a better understanding of the relative importance of the processes involved. The salt marshes of the Eastern Shore of Virginia were 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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