2. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO CURRENT CURRENT 3. Hudson River Sea Level Rise Projections CENTRAL RANGE RAPID ICE MELT SCENARIO 2020 2020 RISK AREAS Inundation ZoneInundation Zone 4. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO 2050 2050 Inundation ZoneInundation Zone 5. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO 2080 2080 Inundation ZoneInundation Zone 6. Hudson River Sea Level Rise Projections RISK AREAS Isolated Inundation Zones CENTRAL RANGE RAPID ICE MELT SCENARIO 2080 2080 7. Increased Coastal Flooding Inundation is the new normal for the river, but what about flooding? Modeling same as inundation, except with FEMA Base Flood Elevations (BFEs) Base Flood Elevations are the basis for 1% risk flooding (100 year floodplains) A Roadmap for Sea Level Rise 8. Increased Coastal Flooding A Roadmap for Sea Level Rise BFE + 36 RiverBFE 9. A Roadmap for Sea Level Rise Increased Coastal Flooding 10. Increased Coastal Flooding January 2013 FEMA issues Advisory BFEs for NYC, NJ, Rockland & Westchester Counties Advisory BFEs Portray Current Flood Risks Not regulatory (yet) Recommended for all future planning Do not consider sea level rise Are 4-6 higher than current BFEs! Source: http://www.region2coastal.com/faqs/advisory-bfe-faq A Roadmap for Sea Level Rise 11. Increased Coastal Flooding June 2013 FEMA issues Preliminary Work Maps for NYC Similar to Advisory BFEs Process toward updating FIRMs A Roadmap for Sea Level Rise 12. Resources at Risk A Roadmap for Sea Level Rise 13. Inundated Area 2100 14. Inundated Area 2100 Overlays with Natural Resources, Infrastructure, and Cultural Resources 15. Intersect with census blocks & calculate statistics If 50% of a census block is inundated at 36, then it is assumed that the same percentage of people and households in that block are inundated at 36 Areal Weighting 16. Inundated Area 2100 Intersect with census blocks & calculate statistics Stats calculated for over 2000 census blocks at each of 13 inundation steps and 13 flood steps Areal Weighting 17. Inundated Area 2100 At risk of inundation by 2100: 9,496 acres 3,654 households 6,911 people At risk of coastal flooding by 2100: 9,460 acres 11,929 households 22,221 people 18. Hudson Valley At Risk Statistics Municipal Infrastructure At Risk Railroad linear miles: Treatment Facilities: Hazardous Facilities: Brownfields: Schools: 102 401 3 11 28 130 23 65 0 10 Inundation Flooding A Roadmap for Sea Level Rise 19. Hudson River Sea Level Rise Projections TIDAL WETLAND IMPACTS CENTRAL RANGE RAPID ICE MELT SCENARIO CURRENT CURRENT 20. Hudson River Sea Level Rise Projections TIDAL WETLAND IMPACTS CENTRAL RANGE RAPID ICE MELT SCENARIO 2020 2020 Inundated Tidal Wetlands Inundated Tidal Wetlands 21. Hudson River Sea Level Rise Projections TIDAL WETLAND IMPACTS CENTRAL RANGE RAPID ICE MELT SCENARIO 2050 2050 Inundated Tidal Wetlands Inundated Tidal Wetlands
