Future Conditions Map Series
On February 7th 2017 the Broward County Board of Commissioners approved the future conditions map series (Item 7). This item provides for the creation of a series of maps that will be used to aid in the design of infrastructure to be resilient with anticipated climate change effects.
The first map in the series is the Future Conditions Average Wet Season Groundwater Elevation Map. This map provide the antecedent conditions for new or major modifications to surface water permitted projects
The second map in the series is the Future Conditions 100-Year Flood Elevation Map. Currently under development, this map will result in a forward-looking community flood map, and the proposal of new building standards to protect infrastructure investments in Broward County.
Saltwater Intrusion Modeling
Many of Broward County's oldest and largest cities are found along the coast where their drinking water supplies are threatened by saltwater intrusion. Broward County in collaboration with the USGS has been developing variable density models to help better manage this threat. The models are calibrated to historic data sets, go through sensitivity analysis to determine which natural and anthropogenic stresses affected the historical movement, and perform predictive analyses to test future conditions both with and without adaptation strategies.
With increased flooding in response to high high tides and or high rainfall storm events the County is expanding its groundwater modeling to include a new Urban Runoff Package (URO). The modeling will focus on two representative areas of Broward County: 1) a tidally influenced community and 2) an inland community dependent on downstream drainage. The model will look at the effects of downscaled climate data and projected sea level rise scenarios will have with and without adaptive strategies to help mitigate future conditions.
The C-51 reservoir is an alternative water supply which would capture stormwater runoffs in the C-51 basin. This would help reduce harmful runoffs of stormwater to the Lake Worth Lagoon while also providing a source of water that would be released and routed to municipal wellfields, increasing regional resilience, especially in extreme drought conditions.
Flood Risk Management Study for Tidally Influenced Coastal Areas
Broward County has partnered with the United States Army Corps of Engineers to conduct a Flood Risk Study on the feasibility of raising sea wall heights to improve resiliency to future flooding related to sea level rise (King Tide Flooding) and associated storm events. The study uses ADCIRC modeling to examine the effectiveness of various sea wall heights against a suite of simulated storm events and associated surge to ultimately help inform recommendations for optimal sea wall heights.
CIRCLE - Deltares
Broward County partnered with Deltares and SFWMD to identify critical infrastructure sectors and cascading effects in relationship to future flooding events. This exercise first inventoried key pieces of infrastructure in various sectors (power, telecommunications, transportation, healthcare) in the County and estimated thresholds before they would be impacted. Next, relationships between sectors were established to show the interconnectivity of infrastructure and help prioritize areas of needed adaptation. 3D visuals were also developed to show areas of impact and how, for instance, a flooded FLP substation may impact other infrastructure that itself may not be flooded but is dependent on the substation such as telecommunication towers, gas stations, schools, etc.
RAND Corporation - Adapting to a Changing Climate in Southeast Florida
RAND Corporation supported the evaluation of how Broward County is vulnerable to flooding and intrusion of saltwater into drinking water. These risks are driven by sea level rise, changes in precipitation, and urban development. The final report presents how the region, including also Miami Dade County, can adapt.
Learn more about our Water Assessment
efforts, including Water Quality, Water Supply Plan, Floridan Aquifer, Canal Integration, and Comprehensive Everglades Restoration Plan.