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An Integrated Approach to Coastal City Flood Resilience
Adam HoskingGlobal Director for Water Resources & Resilience
Susy TorrienteGlobal Leader for City Resilience
&
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Overview
1. Increasing Coastal City Risks
2. Need for an Integrated Approach
3. Operationalizing Integrated Flood Resilience
4. Delivering Flood Resilient places
5. Take Aways
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Coastal Cities are growing.
More people. More housing. More infrastructure.
66% of the global population will live in cities by 2050. UN, 2014
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Our climate is
changing . . .
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Extreme Events Increasing in Frequency & Severity
Number of events as of April 8, 2020
Source: NOAA National Centers for Environmental Information (NCEI) U.S. Billion-Dollar Weather and Climate Disasters. https://www.ncdc.noaa.gov/billions/
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Increasing flood risk
Coastal cities
The OECD is predicting across 136 coastal cities globally there will be a five fold increase in population at risk 136
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The need for an integrated approach
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Multiple sources of flooding
Stormwater/Drainage
Riverine Tidal/Groundwater Storm Surge
Localized flooding Regional floodingRecurrent flooding from
increasing tide levelsCoastal flooding
Precipitation - Driven Coastal
©Jacobs 20208
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Multiple, interlinked receptors
©Jacobs 20209
URBAN SYSTEMS
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The need for integration
©Jacobs 202010
▪ Siloed responses won’t meet needs
▪ Shift from sectoral to ‘place-based’
▪ Considering all interests and challenges facing an area
▪ Opportunities to deliver co-benefits, meet funding challenges
▪ Partnership with communities
Essential if we are to make our coastal cities truly resilient to flooding
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Operationalizing Integrated Flood Resilience
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MIAMI BEACH SEA LEVEL RISE
ADAPTATION CHALLENGES
1. Topography & Geology
2. Aging Infrastructure
3. High groundwater
Courtesy of City of Miami Beach
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Courtesy of City of Miami Beach
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14
Courtesy of City of Miami Beach
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15
Courtesy of City of Miami Beach
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Designing for Sea Level Rise
Courtesy of City of Miami Beach
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Private Property Adaptation: Land Development Regulations Updates
17
Courtesy of City of Miami Beach
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Private Property Adaptation: Land Use Board Review Criteria
The photo shows the
front of the property
elevated 5 feet above
BFE (13 feet NGVD
and 11.44 feet NAVD).
Red line shows the
lowest living floor
elevation of the
house.
Courtesy of City of Miami Beach
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PUBLIC INFRASTRUCTURE
POLICY AND UPGRADES
DESIGN GUIDELINES FOR
HISTORIC PROPERTIES
PRIVATE DEVELOPMENT STANDARDS
IN LAND USE CODE
Miami Beach approach to climate adaptation
Courtesy of City of Miami Beach
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20
Courtesy of City of Miami Beach
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VISION
21
▪ Integrate stormwater management into the larger resilience strategy
▪ Enhance trust, trust the public, increase transparency
▪ Elevate aesthetics and function to perpetuate city’s cultural relevance
▪ Actively use green and open spaces for sponge function
▪ Increase long term financial and comprehensive protection
▪ Go big on the resilience brand –distinguish yourself from your coastal competitors
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22
• Maintain urgency,
• incrementalism &
evaluation,
• transparency,
• ecological health,
• financial pragmatism,
• co-benefits,
• social equity,
• cultural identity,
• living with water,
• long-term and regional
perspectiveCourtesy of City of Miami Beach
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Courtesy of City of Miami Beach
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Courtesy of City of Miami Beach
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Institutionalizing Resilience into the Decision-Making Process
Leadership & Commitment
Structure
Integration
Staff
Training
Community Capacity
Outreach & Education
Implementation
Relationships
Repeat !
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Delivering Flood Resilient Places
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Solutions to fit the space
©Jacobs 202028
▪ Differing challenges require differing solutions
▪ Hazards, uses, community needs differ
Flood Resilient Communities
All Hazards
Nature-based Solutions
Local Solutions
Regional Solutions
Adaptation
Resilient Infrastructure
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All Hazards
©Jacobs 202029
▪ As well as multiple sources of flooding, coastal cities face other natural, and man-made, hazards
▪ Integration considers multiple sources, to deliver a consistent level of resilience
Christchurch, NZ - “Is it worth protecting the city from flooding if another hazard will significantly increase flood risk or cause worse damage”
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Seismic Hazards
Immediate and increasing hazard
Flood and Sea Level Rise HazardsLocalized hazard currently, with increasing urgency over the coming decades
San Francisco Seawall Program
Courtesy of Port of San Francisco
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©Jacobs 202031
Scalable solutions
LOCAL REGIONALCOMMUNITY
Courtesy WSSC Water
Courtesy NYC DEP
Courtesy DC Water
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Green Solutions
©Jacobs 202032
▪ Natural and nature-based approaches
▪ Deliver adaptive flood resilience alongside wider benefits
▪ Delivered at the coastal edge to mitigate rising sea levels, or
▪ Within the urban fabric to manage stormwater
Source, TNC: http://www.nature.org/ourinitiatives/regions/northamerica/unitedstates/newyork/climate-energy/natural-infrastructure-study-at-howard-beach.xml
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Delridge Natural Drainage System - Seattle, WA
Stay Healthy StreetsClosed to thru-traffic – but not residents or deliveries – 24 hours a day, seven days a week. Program extended due to COVID-19.
http://www.seattle.gov/transportation/projects-and-programs/programs/stay-healthy-streets
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Resilient Infrastructure
©Jacobs 202034
▪ Understanding the hazard exposure and consequence
▪ Consider criticality and inter-dependencies
Images courtesy of NYCDEP
https://www1.nyc.gov/assets/orr/pdf/NYC_Climate_Resiliency_Design_Guidelines_v3-0.pdf
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Miami Beach, FL Integrated Water Management Plan
©Jacobs 202035
− Incorporation of Blue Green Infrastructure in all capital projects
− Enhanced risk based policies and minimum design criteria
− Multi-departmental approach to project development
− Integrated approach to project implementation to maximize community benefit
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Adaptable Approaches
©Jacobs 202036
▪ Risks are non-stationary
▪ Inherent uncertainty
▪ Solutions able to maintain their performance standards
▪ Adaptive management, and adaptation pathways
▪ Pro-active monitoring of change and triggers for action
Adapted from Thames Estuary 2100 Strategy, UK
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Coastal adaptation pathway
37
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Spatial PlanningVisualize solutions at the neighborhood scale
Integrating …Scaled SolutionsGreen InfrastructureRelocationPolicyOutreach & EducationFinancial Assistance
Inclusive design, multi-faceted solutions
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East Side Coastal Resilience, NYC
©Jacobs 202039
Images courtesy of One Architecture and Urbanism
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Take Away
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We all have a part to play
▪ A shared ownership and understanding
▪ Look for the opportunities
▪ Take a ‘spatial’ approach to resilience and equity
Integrated Flood
Resilience
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Integration for Resilience
Low resilience, non-adaptiveLittle overlap between knowledge, values and rules
Resilient and highly adaptiveknowledge, values and rules intersect
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An Integrated Approach to Coastal Flood ResilienceThank you and Stay Safe!
Adam Hosking
Susy Torriente
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Important
The material in this presentation has been prepared by Jacobs®.
©2020 Jacobs Engineering Group Inc. All rights reserved. This presentation is protected by U.S. and International copyright laws. Reproduction and redistribution without written permission is prohibited. Jacobs, the Jacobs logo, and all other Jacobs trademarks are the property of Jacobs Engineering Group Inc.
Jacobs is a trademark of Jacobs Engineering Group Inc.
Copyright Notice
44 ©Jacobs 2019