Parent Layer: Predicted Storm Surge from a Hurricane Ike like event in 2004

Name: Storm Surge Inundation in 2004

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Description: The map shows the predicted overland storm surge for Galveston Bay and southern Jefferson County, Texas in 2004 under hurricane Ike (2008) conditions. The storm surge simulation used the 2004 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 the points for storm surge height for land areas were selected, the difference between the maximum storm surge height from the NAVD88 mean sea level (0ft) was subtracted from each point&#8217;s elevation value to calculate the height of the storm surge above the ground surface. The resulting values for overland storm surge height for were then averaged together using a spatial join to a vector polygon grid with a resolution of 300m, which 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 over land areas for the study area. <a href='xml/gulfmex_TX_GBJC_StormSurge_Ike_2004.xml' target='_blank'><b>Metadata</b><a></br>

Copyright Text: The Nature Conservancy

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Spatial Reference: 102100  (3857)

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