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RI Shoreline Change Special Area Management Plan

This document discusses planning for sea level rise in Rhode Island. It provides past, present and projected future rates of sea level rise. It identifies potential impacts of sea level rise such as erosion, overwash, wetland loss, and infrastructure failure. Maps show examples of projected inundation in Newport Harbor from 5 feet of sea level rise. The document outlines studies and data being collected on erosion rates, sediment transport, inundation mapping, and economic impacts. It discusses developing policy recommendations, education materials, and adaptation guidelines for municipalities. Products under development include updated erosion maps, economic analyses, and identification of at-risk infrastructure. The goal is to provide cities and towns with tools and lessons from other areas to help plan for and

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Years before present RateofSLR(mm/yr) “Geologic past” (Fairbanks, 1989; Horton et al. 2009) “Instrumental record” (Church and White, 2006) “Projections” (Rahmstorf, 2007) Past, present, and potential future rates of sea-level rise
So, what can happen? Bluff erosion Overwash Island Breaching Threshold Crossing Urban Inundation R. Carlson Wetland Migration or Loss Water Quality Reduction Ecosystem Change Infrastructure Failure Listed Species Impacts
Newport Harbor: Projected Inundation 5 feet of sea level rise above MHHW
Shoreline  Change/Beach  SAMP New Data & Information:  •Erosion & Sediment Transport  Mapping & Monitoring •Inundation Mapping  •Identification of  Areas/Infrastructure at risk •Economic Analysis •Engineering Evaluation of  tools/techniques • Salt Marsh Migration Planning Tools and Policy  Development • Legal review of Alternative Development  Strategies • Review of Techniques used elsewhere to  address these issues • Lessons learned in NY/NJ from Sandy • Recommendations or Guidance to  Municipalities or other State Agencies on  Best Practices or Policy • New/Improved CRMC Policies Education, Outreach &  Communication • Webpage • Fact Sheets & Targeted Mailings • Social Media • Library Lectures & Stakeholder Meetings • “Group of Community Leaders” to help  get message out  • Videos & Accounts of Personal  Connection Other statewide studies: • EC4 • Dept of Health (health &  drinking water) • Dept of Env. Management  (waste water facilities) • Dept of Transportation  (transportation infrastructure)
Sea Level Is A Land Use Problem Land Use Tends To Be A Municipal Issue Pilot Communities
Solutions At A Workable Scale
Products We Are Working On • New data and information about the shore face dynamics will be developed • Updated Erosion Maps—how has the shoreline changed over time and how might we expect it to change in the future? • Sediment Transport Analysis—where does the sand go after it has been washed away? • Salt Marsh Impact Assessment—how will our wetlands respond to rising sea levels, will they migrate landward or drown in place? • Economic Analysis—what is the cost (insurance, rebuilding, taxes) associated with shoreline change? • Identification of at risk areas and infrastructure—what infrastructure or facilities are at risk from flooding both in the short-term from a major storm event or over the long-term from rising sea levels? • Integration of findings from other statewide vulnerability assessments— integrating all state findings related to shoreline change will provide a more comprehensive picture and improve planning. • Analysis of the legal questions surrounding shoreline change
Tools We Are Working On • A review of tools and techniques that have been used in other places around the USA and the world to potential applicability to the situations in Rhode Island. • Guidelines for Establishing Local Emergency Permitting for Post- Storm Recovery • A compendium of Adaptation Techniques • Homebuyers Guide to Understanding Impacts of Shoreline Change on Coastal Properties • Lessons learned from Hurricane Sandy in New Jersey and New York, and how those lessons relate to and may be able to be adapted to the issues going on in Rhode Island. • Develop a “Nuts and Bolts” took kit for Cities and Towns to draw up • Engineering Review of Potential Rhode Island Adaptation Techniques • Build private sector solutions that shift towards adaptation.
Flood Zones(2009, left and 2013, right)  Misquamicut Barrier 2‐3 ft reduction in BFE 
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Goal: develop independent set of FIRMS for  Washington County using state of the art  methods • Surge and wave simulations forced by  NACCS  ADCIRC and SWAN simulations at save points  for extra‐tropical and tropical storms. • Simulations of near‐shore wave field and  estimates of BFEs using STWAVE • Extremal analysis based on NOAA Generalized  Extreme Value (GEV) analysis tool • Create FIRM maps based on state of the art  methods
A Time To Plan and Adapt