Flood and Heat Risk Analysis
Flood and heat risks have been evaluated based on both current and projected conditions
Resilience Plan (RP) Flood Model Scenarios
The County Resilience Plan addresses 10-, 25-, 50-, and 100-year rainfall events under king tide conditions and saturated system for both 2- and 3.3-foot sea level rise. The Plan also includes the compound effect of the 20- and 100-year storm surge combined with the storm events, and the addition of a rainfall change factor to include the effect of climate change on rainfall intensities.
18 Total Scenarios
See the Plan for a full breakdown of the combination of Resilience Plan scenarios considered.
Criteria
Tidal Condition
King Tide
20-yr Storm Surge
100-yr Storm Surge
Groundwater Conceptualization
Variable GW
Saturated System
Sea Level Rise Scenario
2.0 ft
3.3 ft
Rainfall
10-Yr
25-Yr
100-Yr
Flood Risk Modeling
The MIKE SHE / MIKE HYDRO suite was utilized to assess the flood risks Countywide.
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MIKE SHE/MIKE HYDRO is widely used by hydrologists, water resources engineers, and environmental scientists around the world for research, planning, and management of water resources in the face of climate change, urbanization, and increasing water demand. Its comprehensive approach to modeling the hydrologic cycle and water use makes it an indispensable tool in the field of hydrology and water resources management.
Vulnerability Assessment (VA) Scenarios
Criteria
Tidal Condition
Normal High Tide
Storm Surge (100-year)
Planning Horizon
2021 - Current
2070
2040
Sea Level Rise Projection
2017 NOAA Intermediate Low
2017 NOAA Intermediate High
Rainfall
10-Yr
25-Yr
100-Yr
The Resilient Florida Grant Program specifies that a vulnerability analysis using specific scenarios and date projections must be completed. It specifies use of the 2017 National Oceanic and Atmospheric Administration (NOAA) intermediate-low and intermediate-high sea level rise scenarios and two planning horizons that include 2040 and 2070, to simulate compound flooding or the combination of tidal, storm surge, and rainfall-induced flooding.
30 Total Scenarios
See the Resilient Broward Plan for a full breakdown of the combination of VA scenarios considered.
Heat Risk Analysis
The County’s vulnerable populations are within or near areas that experience high land surface temperatures, making them more susceptible to heat-related deaths and illnesses.
Identifying those Most at Risk
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The County’s most vulnerable populations are within or near areas that experience high land surface temperatures, making them more susceptible to heat-related deaths and illnesses.
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​Nature-based infrastructure is known to reduce the effects of heat islands by maximizing pervious surfaces within urban settings. Additionally, this infrastructure offers mitigation strategies for flooding and rainwater storage while providing sustainable landscaping. These strategies for heat reduction may include:
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Sustainable landscaping and flood-resistant materials
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Pocket wetlands
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Rainwater harvesting
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Bioswales and bioretention
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Permeable pavement or pavers
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Enhanced stormwater ponds
