Item K2Meeting Date: October 21,
2015
Department:
Building
Bulk Item: Yes No
X
Staff Contact Person/Phone :
Ed Koconis, 453-8727
AGENDA ITEM WORDING: Presentation on the updated schedule and scope of work regarding
modeling being used in Monroe County's Coastal Flood Risk Study. The Coastal Flood Risk. Study
being conducted as part of FE A's (Federal Emergency Management Agency's) flood hazard
mapping currently underway for Monroe County.
ITEM BACKGROUND: The Federal Emergency Management Agency (FEMA) is in the midst of a
multiyear coastal engineering analysis and mapping effort to better identify, quantify, and
communicate flood hazards and associated risks in Monroe County. Flood hazard mapping is an
important part of the National Flood Insurance Program (NFIP), as it is the basis of the NFIP
regulations and flood insurance requirements.
An integral component of a coastal flood risk study is the development of state-of-the-art Digital
Elevation Models (DEMs). The DEMs are produced by merging the best available topographic and
bathymetric data, including recent Light Detection and Ranging (LIDAR) system -generated data and
bathymetric data. By integrating the latest topographic datasets with state -of -the art modeling
techniques, FEMA will provide citizens and community officials with up-to-date flood hazard and risk
information.
There are two phases of coastal flood risk study: (1) storm surge (rise in water level associated with a
major storm) and wave modeling and (2) overland wave hazard analysis and mapping. Phase I
includes developing new, state of the art hurricane storm surge models developed specifically for the
region using LiDAR topographic data, best available bathymetric data, NOAA storm meteorology, and
historic surge data. Phase 2 will utilize the new storm surge analysis to remap the flood hazard areas.
The end product of this study will be an updated Flood Insurance Study and updated Flood Insurance
Rate Maps (FIRMs).
Michael DelCharco, P.E. of Taylor Engineering is the Project Manager for FEMA's Southeast Coastal
Studies, which includes updating ("re -mapping") Monroe County's flood hazard maps. Mr. DelCharco
will be providing an update to his presentation made to the BOCC on September 17, 2014. Including
what the model looks like in Monroe County and showing examples of the model mesh, which historic
hurricanes are used for model validation, and what the two phases of modeling will and will not cover.
PREVIOUS RELEVANT BOC'C ACTION: N/A
STAFF RECOMMENDATION: ♦.
TOTAL COST: N/A INDIRECT COST: N/A BUDGETED: Yes No N/A
DIFFERENTIAL
,.'R.. LOCAL PREFERENCE:
OST TO COUNTY: N/A SOURCE OF i .
APPROVED BY: County Atty OMB/Purchasing Risk Management
DOCUMENTATION: Included Not Required_
DISPOSITION: AGENDA ITEM #
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