FROM TIDES TO STORMS: PREPARING FOR NEW HAMPSHIRE’S … · 2017-08-29 · 6/1/2016 2 FROM TIDES...
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6/1/2016 1 Assessing the Risk and Vulnerability of NH Coastal Communities to Sea Level Rise and Storm Surge FROM TIDES TO STORMS: PREPARING FOR NEW HAMPSHIRE’S FUTURE COAST Seabrook - Hampton Falls – Hampton - North Hampton – Rye - New Castle - Portsmouth Julie LaBranche Senior Planner NH Office of Energy and Planning Spring 2016 Planning and Zoning Conference June 4, 2016 FROM TIDES TO STORMS: PREPARING FOR NEW HAMPSHIRE’S FUTURE COAST Portsmouth New Castle Rye North Hampton Hampton Hampton Falls Seabrook Project Deliverables • Maps and Data • Regional and Municipal Vulnerability Assessment reports Project Overview • Evaluate impacts from sea- level rise and storm surge flooding • Roadways, Critical Infrastructure, Natural Resources FROM TIDES TO STORMS: PREPARING FOR NEW HAMPSHIRE’S FUTURE COAST Best-available science Maps and Data Municipal Coordination Implementation Guidance Vehicles for Informed Planning Applicability Tools and Applications
Transcript of FROM TIDES TO STORMS: PREPARING FOR NEW HAMPSHIRE’S … · 2017-08-29 · 6/1/2016 2 FROM TIDES...
6/1/2016
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Assessing the Risk and Vulnerability of NH Coastal Communities to
Sea Level Rise and Storm Surge
FROM TIDES TO STORMS:
PREPARING FOR NEW
HAMPSHIRE’S FUTURE COASTSeabrook - Hampton Falls – Hampton - North Hampton – Rye - New Castle - Portsmouth
This project is funded by New Hampshire HomelandSecurity and Emergency Management (HSEM)through a Pre-Disaster Mitigation Grant from theFederal Emergency Management Agency (FEMA). Julie LaBrancheSenior Planner
NH Office of Energy and Planning
Spring 2016 Planning and Zoning ConferenceJune 4, 2016
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
Portsmouth
New Castle
Rye
North Hampton
Hampton
Hampton Falls
Seabrook
Project Deliverables
• Maps and Data
• Regional and Municipal
Vulnerability Assessment
reports
Project Overview
• Evaluate impacts from sea-
level rise and storm surge
flooding
• Roadways, Critical
Infrastructure, Natural
Resources
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
� Best-available science
� Maps and Data
� Municipal Coordination
� Implementation Guidance
� Vehicles for Informed Planning
� Applicability
Tools and Applications
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FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
+6.3 feet sea level
+4.0 feet sea level
+1.7 feet sea level
Source: Wake CP, Kirshen P, Huber
M, Knuuti K, and Stampone M
(2014) Sea-level Rise, Storm Surges,
and Extreme Precipitation in
Coastal New Hampshire: Analysis of
Past and Projected Future Trends.
Best Available Science- SLR Scenarios/Projections
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
Sea-level rise Sea-level rise + Storm surge
High-
Resolution
Mapping
Flood Extents
Impacts to
assets and
resources
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
High-
Resolution
Mapping
Flood Extents
Impacts to
assets and
resources
Example: Rye Harbor
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FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
0
10
20
30
40
50
60
MHHW+ 1.7
feet SLR
MHHW+ 4.0
feet SLR
MHHW+ 6.3
feet SLR
storm surge +
1.7 feet SLR
storm surge +
4.0 feet SLR
storm surge +
6.3 feet SLR
State and Local Roadways (miles)
Local State
Impacts by
Asset type
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
0
5
10
15
20
25
Hampton Hampton
Falls
New
Castle
North
Hampton Portsmouth
Rye Seabrook
Miles of Roadway by Municipality
SLR + 1.7 feet SLR + 4.0 feet SLR +6.3 feet
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
0
200
400
600
800
1,000
1,200
1,400
Upland - acres above mean higher high water
SLR + 1.7 feet SLR + 4.0 feet SLR +6.3 feet
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FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
0
200
400
600
800
1,000
1,200
1,400
1,600
Municipal Zoning Districts (acres)
SLR + 1.7 feet SLR + 4.0 feet SLR +6.3 feet
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
Implementation Guidance
• Designing for resiliency in the current 100-year floodplain
will protect against long term sea-level rise
• Adaptation strategies need to be customized to address
variable conditions
• Iterative actions, not a one-size-fits-all problem
• No-regrets policies and investments
• Periodic review and evaluation of climate science findings,
adjust strategies accordingly
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
Municipal Coordination
Administration
Public Works
Planning
Building/Code Enforcement
Conservation
Public Outreach &
Participation
Community Support
For Actions
Regional & State
Coordination
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• Critical Infrastructure
• State and Local Roads
• Utilities and Infrastructure
• Natural Resources - Environment
• Policy and Planning Recommendations
• Regulatory Strategies
• Non-Regulatory Approaches
Local
Hazard Mitigation
Plans
State Agency
Plans
Regional
Master Plan
Natural Resource
Conservation
Vulnerability Assessment
Regional Planning Recommendations
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
Vehicles for Informed Planning
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
How can the project results be useful?
o Inform recommendations in the CRHC Final Report
o Assist regional practitioners with technical assistance
and outreach to municipalities
o Guide policy changes by state agencies
o Provide a solid rationale for grant proposals to fund
infrastructure improvements, planning and community
outreach
Project Applicability
FROM TIDES TO STORMS: PREPARING FOR
NEW HAMPSHIRE’S FUTURE COAST
• Regional Assessment and Maps
• Municipal Assessment and Maps
http://www.rpc-nh.org/regional-community-planning/climate-change/resources
For information contact:
Julie LaBrancheSenior Planner
Rockingham Planning Commission
156 Water Street, Exeter, NH 03833
Phone: (603) 778-0885
Email: [email protected]
Project Materials
