{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "Feature dataset of marsh health, a component of the Marsh Protection Index that scores marsh health using the conceptual marsh units elevation and UVVR (unvegetated to vegetated ratio)", "description": "

Maximum 15 points. A wave attenuation index was created for use in the MPI project, using a dataset of modeled wave height provided by George Mason University (GMU) that was used as a proxy for exposure. Higher wave heights for marshes indicated a higher amount of exposure during storms, giving them a higher score for attenuation benefits. Although the data is only available upon request, users can read more about the work GMU did to produce the wave height modeling in the following papers: <\/SPAN>1<\/SPAN><\/A>, <\/SPAN>2<\/SPAN><\/A>, <\/SPAN>3<\/SPAN><\/A>, <\/SPAN>4<\/SPAN><\/A>. The wave height data was combined with marsh size (larger marshes scoring higher points) to create the wave attenuation index, and the data was scored from 0-10. For each CMU, the attenuation score was summarized within to get the average wave attenuation score for that marsh unit. This data was binned and translated to a 0-15 scale accordingly: between 0 and < 2.5 received 0 for MPI, >= 2.5 and < 3.5 received 5 for MPI, >=3.5 and <=5 received a 10 for MPI, >5 received a 15 for MPI. This scoring is labeled wa_at_score_mean in the MPI attribute table.<\/SPAN><\/P>

Last updated: 03/30/2026<\/SPAN><\/P><\/DIV>", "summary": "Feature dataset of marsh health, a component of the Marsh Protection Index that scores marsh health using the conceptual marsh units elevation and UVVR (unvegetated to vegetated ratio)", "title": "Wave Attenuation", "tags": [ "MD iMAP", "Maryland", "MD", "Elevation", "Environment", "Hydrology", "DNR", "MDNR", "Maryland Department of Natural Resources", "Department of Natural Resources", "Dynamic", "Wetland", "Marsh", "Sea Level Rise", "SLR", "Marsh Protection", "Resilience", "Wave Attenuation", "Marsh Management", "Resiliency", "Marshes Model", "Conceptual Marsh Units", "WMS", "WFS", "KML" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "MD iMAP, DNR, USGS, GMU, George Mason University, NWI, USFWS", "licenseInfo": "", "portalUrl": "" }