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Conceptual marsh units of Maine salt marshes

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Citation

Ackerman, K.V., Defne, Z., and Ganju, N.K., 2024, Geospatial characterization of salt marshes in Maine: U.S. Geological Survey data release, https://doi.org/10.5066/P9FRGLB0.

Summary

This data release contains coastal wetland synthesis products for the state of Maine. Metrics for resiliency, including the unvegetated to vegetated ratio (UVVR), marsh elevation, tidal range, and lifespan, 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 [...]

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CMU_ME_Browse.png
“Conceptual marsh units of salt marshes in Maine”
thumbnail 1.13 MB image/png
Shapefile: CMU_ME.zip
CMU_ME.cpg 5 Bytes
CMU_ME.dbf 2.76 MB
CMU_ME.lyrx 41.89 KB
CMU_ME.prj 425 Bytes
CMU_ME.sbn 88.4 KB
CMU_ME.sbx 2.42 KB
CMU_ME.shp 161.11 MB
CMU_ME.shx 70.09 KB
CMU_ME.sld 9.15 KB

Purpose

The purpose of this shapefile is to show the conceptual marsh units as well as the vegetated and unvegetated components of each. 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 Maine 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.
Conceptual marsh units of salt marshes in Maine
Conceptual marsh units of salt marshes in Maine

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