When the water elevation of the waterbody that the drainage systems outfalls into, is higher than the drainage system itself.
Type of Prevention
Flooding for coastal communities has always been an issue, but sea level rise has increased the frequency and severity of inland impacts from tidal flooding. The City of Delray Beach has included infrastructure projects within our Capital Improvement Plan that aim to reduce the effects of flooding to our residents and business owners.
In-line check valves
Inline check valves are an effective and aesthetic method employed to prevent tidal backflow in a drainage system. Due to the ease of installation, low maintenance requirement, and low head-loss, in-line check valves have become the City’s preferred stormwater backflow prevention measure.
Flap Gates are typically installed at stormwater discharge points directly downstream of stormwater pump stations. They must be periodically maintained to ensure a thorough seal to prevent tidal backflow.
Similar to flap gates, duckbill valves are installed to a headwall or seawall at stormwater discharge points. They require a relative low flow or hydraulic head condition to function, but their exposure to the environment can cause a higher level of maintenance to function properly. The City is currently replacing duckbill valves with in-line check valves.
Located along the western shore of the Intracoastal Waterway directly north of Atlantic Avenue is comprised of over 650 linear feet of seawall
The City’s municipal marina is located along the western shore of the Intracoastal Waterway between South East 1st Street and South East 2nd Street
Beach Nourishment Pre-Construction Engineering
The City has one of the most successful beach maintenance and preservation programs in the United States.
Beach Nourishment Post-Construction Engineering
The two most recent beach nourishment projects were constructed between January 2013 and May 2014
The permits for beach nourishment require pre-sea turtle nesting season beach tilling to loosen the sand in anticipation of the nesting season.
Dune Management Program
The City maintains a thriving coastal beach and strand dune ecosystem. Coastal dunes serve a number of functions, including trapping