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Coastal inundation caused by severe weather events such as hurricanes was investigated by applying a numerical simulation for the area of eastern Pennsylvania. The study area includes long extension of coastal low-lying lands by the Delaware River, including Philadelphia city as well as Chester and Delaware counties, which is under the risk of coastal inundation when hurricanes hit the mid-Atlantic regions. The SLOSH (Sea, Lake and Overland Surges from Hurricanes) model, initially developed by the National Weather Service (NWS), was implemented to the study area to evaluate the probability of inundation due to combined effect of Hurricane storm surge and the climate change and subsequent sea-level rise. Dr. Yong Hoon Kim and Ms. Dominica DeFelice, an undergraduate student in the Department of Earth and Space Science, collected coastline and topography data of the eastern Pennsylvania, digitized them into proper GIS format, and ran SLOSH simulation with these newly-collected data. The simulation results show that the low land areas around Chester, Philadelphia airport and Philadelphia Naval business area could be inundated even under category 3 hurricanes if we have a sea-level rise of 2.23 ft above the present level at year 2050 (based on IPCC 5th Assessment Report). With category 5 hurricanes, some residential areas in southwestern Philadelphia and oil storage tanks fields along Schuylkill river could also be under influence. This study shows high risk of inundation in lowland coastal areas in eastern Pennsylvania during severe Hurricanes when we have sea-level rise near future. The findings from this project will be used to teach Impact of Climate Change topic in Dr. Kim’s ESS 130 Our Coastal Ocean (Gen Ed) and other courses. This study was supported by Sustainability Research and Creative Activities Grant from Office of Sustainability, West Chester University of Pennsylvania.

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