Coast Smart Climate Ready Action Boundary (CRAB)
Conveying Flood Risk Beyond the Floodplain
The Coast Smart Data Model
Currently the FEMA floodplain layer records a base flood elevation above sea level
The Coast Smart Data Model
If a community simply adds a higher elevation to their floodplain it only applies within that FEMA boundary.
The Coast Smart Data Model
Maryland Coast Smart regulations that went into effect on September 1st, 2020 - now require State projects over $ 500,000 for construction or State funding to apply the corresponding horizontal limits of the higher 100-year + 3 feet inundation as indicated by the Coast Smart - Climate Ready Action Boundary (CS-CRAB).
The Coast Smart Data Model
The FEMA Floodplain Limit remains inundated with an additional 3 feet of water added to it. The Newly Inundated area shows how 3 additional feet of water moves across new areas of the landscape based on the land elevation profile or Digital Elevation Model (DEM). The map layers on this page illustrate that (A) the Digital Elevation Model, should be added to (B) the CS-CRAB Inundation Height to Indicate the Required CS-CRAB Elevation or (A) + (B).
Anne Arundel County
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