Parent Layer: Predicted Storm Surge from a Hurricane Katrina like event with 1m SLR by 2100

Name: Storm Surge Inundation in 2050

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Description: The map shows the predicted overland storm surge in 2050 with 1 meter of sea level rise for Grand Bay, Mississippi under hurricane Katrina (2005) conditions. The storm surge simulation used the 2009 landcover map of initial conditions from the Sea Level Rise Affecting Marsh Model (SLAMM) to calculate the bottom friction resistance (Manning's n) and wind roughness (Z0) parameters for the storm surge model. The image was created from the original storm surge model point file by isolating all points that had positive elevation (land areas) and values other than -99999 (no data) for storm surge height. Once all land areas that were inundated by storm surge in the model were selected, the elevation value of each of the selected points was subtracted from the maximum storm surge elevation height, which showed height above sea level (0ft NAVD88), to calculate the height of the storm surge above the ground surface. The resulting values for the storm surge height above the ground surface were then averaged together using a spatial join to a vector polygon grid with a resolution of 150m, where the resolution was based on the maximum spacing between points in the original file for the study area. The vector grid was then converted to a raster image with the same resolution, which represented the maximum predicted storm surge height in feet above the ground surface within the study area. <a href='xml/gulfmex_MS_GBN_StormSurge_Katrina_1mSLR_2050.xml' target='_blank'><b>Metadata</b><a></br>

Copyright Text: The Nature Conservancy

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XMin: -9851618.791855648
YMin: 3544541.686834051
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Spatial Reference: 102100  (3857)

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