Comprehensive Flood Risk Assessment for Wastewater Treatment Plants under Extreme Storm Events: A Case Study for New York City, United States

Wastewater treatment plants (WWTPs) in the City of New York, United States, are particularly vulnerable to frequent extreme weather events, including storm surges, high-intensity rainfall, and sea level rise, also affected by cascade these events. The complex structural configuration WWTPs requires very fine-scale flood risk assessment, which current research has not pursued. We propose a robust technique quantify inundations for fourteen WWPTs through an automated sub-basin creation tool; 889 sub-basins were generated merged with high-resolution building footprint data create comprehensive database inundation analysis. depths extents flood-prone regions identified from hydrodynamic modeling surge rise. economic damage due flooding was quantified using HAZUS-MH model. Results indicated that surges various categories hurricanes have dominant impacts on around WWTPs, followed rainfall. Sea rise shown relatively minor impact depths. analysis showed subjected ranging USD 60,000 720,000, depending size WWTP extremity surge. method analyzing status object enables more accurate be obtained when calculating runoff. It allows clearer view combined actual buildings. Using this database, predicting conditions any event or events can conducted quickly accurately.