The Draa Field Stormwater Park project, located in the Marina Basin of the Area II watershed in northern Titusville, Florida, represents an ongoing effort by the City of Titusville to provide a water quality benefit to the Indian River Lagoon and to reduce flooding within the basin. This project featured stormwater infrastructure improvements and the construction of a stormwater treatment facility that uses innovative best management practices (BMPs), which include a wet detention pond, littoral planting, wetland biofiltration treatment, pervious parking, a limestone permeable reactive barrier, and pond aerators.
ECT has carried out a number of tasks of this overall project. ECT’s first task was to collect existing data within the 278-acre basin in addition to historical data found in city and county records. ECT mapped and documented all existing drainage infrastructures, channels/ditches, and other facilities’ related stormwater into GIS maps, using GPS technology. In total, 165 culverts were identified, documented, and mapped.
ECT also developed an Inter-Connected Pond Routing (ICPR) watershed model to simulate the hydrology and hydraulics of the study area. Hydrologic parameters, such as sub-basin delineation, soils hydrological parameters, curve number, directed connected impervious area, and time of concentration, were developed using GIS and ArcHydro tools base on a Light Detection and Ranging (LiDAR) data derived Digital Elevation Model (DEM).
Based on the results of the modeling, ECT developed a series of potential alternatives to address the water quality and flood reduction goals. The selected alternative consists of a sediment forebay, 4-acre wet detention pond, and a flow-through marsh.
This facility provides a reduction in nitrogen and phosphorus leaving the system that helps meet the Total Maximum Daily Load (TMDL) requirements for the lagoon. The Park, which serves as a trailhead to the East Central Regional Rail Trail, also has many amenities such as a walking trail, educational kiosks, renovated restrooms, and fountains.