The Role Of Green And Grey Infrastructure In - - PowerPoint PPT Presentation

The ¡Role ¡Of ¡“Green” ¡And ¡“Grey” ¡ Infrastructure ¡In ¡Crea7ng ¡Resilient ¡ Communi7es ¡ ¡-­‑ ¡New ¡Planning ¡Paradigms ¡-­‑

Bill Cesanek, AICP CDM Smith, Inc. PlanSmart 2013 NJ Regional Planning Summit Investing in the New Normal April 30, 2013

Coastal Resiliency Issues

• Hazard mitigation strategies or actions are typically

focused on a disconnected series of emergency services, structure or infrastructure protection projects, and public

• utreach and reconstruction initiatives
• More emphasis needs to be placed on non-structural

measures available through local land use planning or policy alternatives

• Hazard mitigation plans are typically stand-alone

documents that cover multiple jurisdictions

• Directly link / integrate hazard reduction with other

community-specific planning tools such as comprehensive land use plans and development regulations.

http://www.ie.unc.edu/cscd/projects/pdf/Berke.Lyles.Smith_CRSDMA_ResearchSummary.pdf

Intersections between coastal smart growth & hazard mitigation strategies

http://coastalsmartgrowth.noaa.gov/pdf/hazard_resilience.pdf

Photo courtesy of Leah Bray

CONSERVATION STRATEGY FOR THE MISSISSIPPI GULF COAST Technical Advisory Committee

Identifying Critical Natural Resources in Coastal Mississippi

25% Wetlands 35% NWI 45% CCAP Wetlands 20% Hydric Soils 10% Hydrologic Soil Groups 20% Flood Zones 25% Elevation/Slope 55% Elevation (DEM) 45% Slope 20% Evergreen Forest 100% Total of Categories

Conservation Lands Mapping Lowlands – Gulfport Area

• Philadelphia created

the first Combined Sewer Overflow Long- Term Control Plan in the country to focus on green stormwater infrastructure

• Creates long-term

strategic investments in community and economic development

NATURAL ¡vs. ¡URBAN ¡STORMWATER ¡DRAINAGE ¡

Stormwater ¡infiltrates ¡into ¡the ¡ ground ¡ Plants ¡and ¡trees ¡work ¡to ¡absorb ¡ stormwater ¡ Water ¡hits ¡impervious ¡surface ¡and ¡ runs ¡off ¡roofs, ¡streets, ¡parking ¡lots ¡etc. ¡ ¡ Runoff ¡goes ¡into ¡the ¡sewers ¡ ¡

http://www.nrcs.usda.gov/technical/stream_restoration/Images/scrhimage/chap3/fig3-21.jpg

40% evaporation 10% runoff

Natural ¡Ground ¡Cover ¡

30% evaporation 55% runoff

City ¡SeIng ¡70-­‑100% ¡impervious ¡surface ¡area ¡

25% shallow infiltration 25% deep infiltration 10% shallow infiltration 5% deep infiltration

• Public: invests in creating green stormwater

infrastructure

• Private: apply strong stormwater regulations for

development

• Standardize green infrastructure for all city projects

9,500 ¡Impervious ¡Acres ¡Become ¡“Greened ¡Acres” ¡

Private Lands

• Industrial/Commercial/Institutional
• Homes
• Parking
• Alleys, Driveways and Walkways

¡ ¡ ¡ ¡Public Lands

• Streets
• Schools
• Public Facilities
• Open Spaces

Springside ¡School ¡“Water ¡Wall” ¡and ¡Rain ¡Garden ¡ Saylor ¡Grove ¡Stormwater ¡Wetland ¡ Friends ¡Center ¡Green ¡Roof ¡

EIGHT ¡GREEN ¡PROGRAMS ¡

7th ¡and ¡Washington ¡

GreenPlan ¡Philadelphia ¡

Some Resiliency Strategies

• Prioritize funding for hazard mitigation strategies that

emphasize smart growth benefits while simultaneously protecting against future hazards.

• Provide credits for smart growth strategies implemented
• utside of flood zones that reduce impacts on the

floodplain through FEMA’s Community Rating System.

• In local and county plans, address infrastructure

investments that reduce risk and are aligned with other local hazard mitigation plans.

• Include information about projected future risks, such as

floods and storm frequency, when developing future land use plans.

http://coastalsmartgrowth.noaa.gov/pdf/hazard_resilience.pdf

More Resiliency Strategies

• Consider long-term climate change impacts in planning,

design, and cost determination for infrastructure, such as roads, water and wastewater systems, and electric utilities.

• Consider the connections between ecosystem buffers and

restoration, and hurricane protection

• Shift to more integrative planning – including natural

resource buffer protection, infrastructure resiliency, and future risk/uncertainty.

http://coastalsmartgrowth.noaa.gov/pdf/hazard_resilience.pdf