Investigating compound flooding in a low elevation coastal karst environment using multivariate statistical and 2D hydrodynamic modeling

• DOI: 10.1016/j.wace.2022.100534
• Publication Date: 2022-12-06T18:26:43Z
• Authors: Francisco Peña; Jayantha Obeysekera; Robert Jane; Fernando Nardi; Carolina Maran; Andre Cadogan; Frederique de Groen; Assefa Melesse
• Keywords: Pluvial; Flash flood; Coastal flood; Flood stage; Storm Surge

Miami-Dade County is vulnerable to flash, pluvial, fluvial, coastal and groundwater flooding due its low-elevation karst morphology. Despite considerable advances in understanding the impact of compound events by considering major flood drivers (precipitation, river discharge, surge), little known regarding severity hazards this region. This study links a multivariate statistical analysis with coupled physically-based 2D hydraulic model estimate hazard Arch Creek Basin located North Miami. A bivariate copula was used capture joint probability key predefined water table thresholds set-up modeling conditions. Results demonstrate high vulnerability extreme precipitation compared surge area. Similarly, relevant shallow environments, as it influences terms inundation depth, extent, damage built environment. research demonstrates that latent risk should be incorporated mapping regions susceptible tables sea level rise.