A planning tool for preliminary assessment of transportation infrastructure vulnerable to current and future flooding

ESRI Climate Resilience App Challenge 2014

Sea Level Rise (SLR) Inundation Surface Calculator, ArcGIS 10.1 Add-in


The Sea Level Rise (SLR) Inundation Surface Calculator is an ArcMap add-in for mapping inundation in Florida due to Sea level rise. The calculator assists users in creating GIS layers of inundated areas (“inundation surfaces”) under various rates of relative sea level rise, time periods, and tidal datums. This add-in developed using Python and C Sharp.

There are two methods for creating inundation surfaces. Using the first method, the user can input a custom amount of sea level rise. For example, the user can choose to create an inundation surface showing 1 meter of sea level rise. Please note – the SLR amount is calibrated to the Key West tide gauge, at Mean Higher High Water, then converted to NAVD88.

The second method uses the U.S. Army Corp of Engineers (USACE) sea level change projection methodology, as specified in Engineer Circular EC 1165-2-212, which calculates relative sea level rise for future time periods. The Corp method was developed with NOAA (National Oceanic and Atmospheric Agency) and USGS (United States Geological Survey) and uses NOAA tide gauge data and sea level trends, local rates of vertical land movement, and incorporates the most recent IPCC projections of global sea level rise.

The calculator outputs include a bathtub inundation surface and a refined inundation surface with hydrologic connectivity filter which removes isolated areas. Both outputs are available in raster or vector feature class format.

Please note: the calculator currently only supports inundation mapping in Florida, but it can be expanded to include other states.

It is highly recommended that you read both the SLR_Calculator_Guide_v2.0 and Final Report before using the calculator. The University of Florida GeoPlan Center created this add-in tool as part of a project funded by the FL Dept of Transportation.