Scenic Hudson Sea Level Rise Mapper - Part 2

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On Wednesday, September 18th - as part of the Hudson Estuary Watershed Resiliency Project's Seminar Series - Jason Winner, Conservation GIS Manager for Scenic Hudson presented on the new Sea Level Rise Mapper.

The mapper is a tool for communities and stakeholders to use to create visualizations of future scenarios of sea level rise. With these maps and information, Scenic Hudson is supporting communities' efforts to develop adaptation plans by helping them to:

- create maps of the extent and impacts of inundation and flood zone expansion

- understand the locations of key built and natural resources

- create graphics that illustrate different sea level rise scenarios in specific communities or stretches of the river

- estimate the risks to infrastructure and natural resources and the likelihoods of different inundation events

- develop alternative adaptation scenarios and weigh their cost and benefits with respect to built infrastructure and natural resources

** The Sea Level Rise Mapper can be found on Scenic Hudson's website at: http://www.scenichudson.org/slr/mapper

For more information, contact Jason Winner at Scenic Hudson at (845) 473-4440 ext 223, or jwinner@scenichudson.org

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Scenic Hudson Sea Level Rise Mapper - Part 2

  1. 1. Inundation Model A Roadmap for Sea Level Rise
  2. 2. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO CURRENT CURRENT
  3. 3. Hudson River Sea Level Rise Projections CENTRAL RANGE RAPID ICE MELT SCENARIO 2020 2020 RISK AREAS Inundation ZoneInundation Zone
  4. 4. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO 2050 2050 Inundation ZoneInundation Zone
  5. 5. Hudson River Sea Level Rise Projections RISK AREAS CENTRAL RANGE RAPID ICE MELT SCENARIO 2080 2080 Inundation ZoneInundation Zone
  6. 6. Hudson River Sea Level Rise Projections RISK AREAS Isolated Inundation Zones CENTRAL RANGE RAPID ICE MELT SCENARIO 2080 2080
  7. 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 (BFE’s) • Base Flood Elevations are the basis for 1% risk flooding (100 year floodplains) A Roadmap for Sea Level Rise
  8. 8. Increased Coastal Flooding A Roadmap for Sea Level Rise BFE + 36” RiverBFE
  9. 9. A Roadmap for Sea Level Rise Increased Coastal Flooding
  10. 10. Increased Coastal Flooding January 2013 – FEMA issues Advisory BFE’s for NYC, NJ, Rockland & Westchester Counties Advisory BFE’s • Portray Current Flood Risks • Not regulatory (yet) • Recommended for all future planning • Do not consider sea level rise • Are 4-6’ higher than current BFE’s! Source: http://www.region2coastal.com/faqs/advisory-bfe-faq A Roadmap for Sea Level Rise
  11. 11. Increased Coastal Flooding June 2013 – FEMA issues Preliminary Work Maps for NYC • Similar to Advisory BFE’s • Process toward updating FIRMs A Roadmap for Sea Level Rise
  12. 12. Resources at Risk A Roadmap for Sea Level Rise
  13. 13. Inundated Area 2100
  14. 14. Inundated Area 2100 Overlays with Natural Resources, Infrastructure, and Cultural Resources
  15. 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. 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. 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. 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. 19. Hudson River Sea Level Rise Projections TIDAL WETLAND IMPACTS CENTRAL RANGE RAPID ICE MELT SCENARIO CURRENT CURRENT
  20. 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. 21. Hudson River Sea Level Rise Projections TIDAL WETLAND IMPACTS CENTRAL RANGE RAPID ICE MELT SCENARIO 2050 2050 Inundated Tidal Wetlands Inundated Tidal Wetlands

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