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A numerical study of storm surge and inundation in the Croatan



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Estuarine Coastal and Shelf Science 59 2004 121e137 A numerical study of storm surge and inundation in the CroataneAlbemarleePamlico Estuary System Machuan Peng Lian Xie Leonard J Pietrafesa Department of Marine Earth and Atmospheric Sciences North Carolina State University Box 8206 Raleigh NC 27695 8208 USA Received 5 July 2002 accepted 31 July 2003 Abstract An integrated storm surge and inundation modeling system is used to simulate the storm surge and inundation in the CroataneAlbemarleePamlico Estuary System in eastern North Carolina under the in uence of 10 hypothetical Category 2 and 3 hurricanes representing typical historical hurricane scenarios in the study region The integrated storm surge and inundation modeling system is numerically stable in the complex and shallow CAPES environment under hurricane forcing conditions For an assumed northward or northeastward moving Category 3 hurricane with a translation speed of 25 km h the peak storm surge occurs along the western Pamlico Sound and western Albemarle Sound The most severe ooding as measured by inundation area is in the Pamlico River mouth region where the ooding area reached 500 km2 In general a more intense or larger hurricane lower minimum central pressure MCP or larger radius of maximum wind RMW produces higher storm surge and a larger inundation area in the entire region For the cases considered in this study the storm surge height and inundation area are more sensitive to MCP than to RMW Slower translation speed produces higher storm surge and thus larger inundation area but the sensitivity of storm surge to storm translation speed can be vastly di erent for di erent storms 2003 Elsevier Ltd All rights reserved Keywords storm surge inundation numerical modeling coastal ooding hurricane 1 Introduction The CroataneAlbemarleePamlico Estuary System CAPES Fig 1 in eastern North Carolina is the largest lagoon system and the second largest estuary next to Chesapeake Bay in the United States Pietrafesa et



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