In July 2013 I cycled around Tybee Island, Georgia's 3' contour line. The contour I followed is referenced to current high tide, or mean higher high water (MHHW). This is approximately where forecasts of sea-level rise predict the future extent of high tide to be around the year 2100 given current climate change modeling and emissions scenarios.

The map in the upper left shows my location tracing (approximately) the future high tide line. The blue shading on the map represents areas that are predicted to become tidal over the rest of this century assuming no modifications to the landscape. This prediction also does not take into account existing seawalls and armoring that may prevent the sea from encroaching on these areas. The green shading shows the current extent of tidal water. To learn more, check out the blog at rdeanhardy.com

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