Rapid Tidal Reconstruction for the Coastal Hazards System and StormSim Part I: Coastal Texas and Louisiana
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This Coastal and Hydraulics Engineering Technical Note CHETN describes the efforts towards incorporating a rapid tidal time series reconstruction and prediction subroutine within the Coastal Hazards System CHS framework. The CHS httpschs.erdc.dren.mil is a national database and web tool that provides probabilistic coastal hazard analysis PCHA products developed from regional studies such as the North Atlantic Coast Comprehensive Study Nadal-Caraballo et al. 2015 Cialone et al. 2015. PCHA considers hazards due to both tropical and extratropical cyclones, depending on the storm climatology of the region of interest. The CHS supports feasibility studies, probabilistic design of coastal structures, flood risk management for coastal communities, and critical infrastructure. In the case of tropical cyclones TCs or hurricanes, both the timing of landfall and the level of the astronomical tide at the landfall location are critical in determining the magnitude of the still water level i.e., storm surge wave setup astronomical tide. Therefore, a robust and accurate tide prediction methodology is needed to provide reliable reconstruction of tidal time series for historical, synthetic, and forecasted hurricane scenarios. This CHETN also discusses the quantification and validation of the Advanced Circulation ADCIRC tidal constituent database in the coastal Texas and Louisiana region as well as the implementation of the tidal reconstruction program Unified Tidal analysis UTide in the CHS framework.