Phase 1: Data Collection
This phase includes available data source reviews, data transfers from the City of the information related to the stormwater system, the design development and data extraction and coding of a new geographic information system (GIS), creation of the City new stormwater atlas map, repetitive loss and level of service analyses, a flood stage gauge network initial evaluation, field survey of the existing seawalls and channel cross section for canals.
Phase 2: Flood Modeling
This phase includes the engineering and analysis to create and run the stormwater models which includes digital terrain elevation model surface (DEM), establishment of watersheds and subcatchments, identification of the PSMS extents and coding of the PSMS data, soils capacities, aquifer transmissivity, groundwater levels, boundary conditions, gate operations and tides interaction, and pervious and impervious coverages. The task
includes model runs for three design storms and two sea level rise conditions, water quality analysis, flood plain maps for the scenarios run, prioritized and phased proposed capital improvements to mitigate flooding with cost estimation and update stormwater design standards criteria.
Phase 3: Infrastructure Recommendations
This phase includes system resiliency analyses for extreme events, and inundation mapping under future SLR scenarios, an extreme rainfall model run analysis, and a summary of resilient CIP features.
Phase 4: Policy Guidance Design Standards
This phase develops a twenty-year CIP for a chosen level of service, project prioritization based on needs, regulatory compliance coordination, transfer and training of City Staff on the use of the models, and presentations of the results and recommendations to stakeholders.
Phase 5: Tools & Training
This phase incudes training the city staff on using the new and updated models.