Application of STORMTOOLS Coastal Environmental Risk Index (CERI) to Inform State and Local Planning and Decision Making along the Southern RI Shoreline

摘要: STORMTOOLS coastal environmental risk index (CERI) was applied to communities located along the southern coast of Rhode Island (RI) determine structures in flood plain. CERI uses estimates base elevation (BFE), explicitly including effects sea level rise (SLR); details on structure types, from E911 emergency data base/parcel data, and associated first floor (FFE); damage curves US Army Corp Engineers North Atlantic Coast Comprehensive Study (NACCS) damages for study area. Surge levels offshore waves used BFEs were obtained NACCS hydrodynamic wave model predictions. The impacts erosion flooding modeled using XBeach STWAVE validated by observations at selected locations coastline. estimated structural each plain 100 yr with SLR ranging 0 10 ft. number increase approximate linearly 3700 no about 8000 ft SLR, equal percentages four (Narragansett, South Kingstown, Charlestown, Westerly, (RI)). majority are single/story residences without (41%) (46%) basements (total 87%; most vulnerable). Less vulnerable elevated piles 8.8% total. remaining commercial principally either Port Galilee or Watch Hill. analysis showed that 20% be damaged 50% greater. This increases 55% as rises 5 At higher values percent greater slowly declines 45% SLR. behavior is a result homes below MSL increasing dramatically moves than thus being removed pool. Generalized maps have developed allow managers broad siting any location their communities. has recently become available mobile phone App, facilitating ability state local decision makers public locating building type