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Building Resiliency Workshop III
March 16, 2012
Camille Manning-Broome, Director of Planning
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THE BEST PRACTICES MANUAL FOR
DEVELOPMENT IN COASTAL LOUISIANA
Strategies that are appropriate to Louisianas unique geographies and cultures
Community scale tools and strategies
Building scale tools and techniques
Implementation through risk-reduction ordinances
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STRATEGIES IN COASTALLOUISIANA
Best Practices Manual for Development in Coastal Louisiana
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Coastal landscape higher land near river banks
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Over time, water levels have risen
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Roadways and settlement in the region clustered along riverbanks
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Water levels continue to rise and communities struggle to adapt
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Options include elevating.
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Elevating and fortifying
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And abandoning when absolutely necessary
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DEVELOPMENT NEAR WATER:
ELSEWHERE, USA
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LOUISIANAS COASTAL REGIONS
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DEVELOPMENT NEAR WATER:
SOUTHERN LOUISIANA
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TYING STRATEGIES TO THE GEOTYPES
Where is eachstrategy most
applicable?Key for connecting
strategies to Geotypes
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COMMUNITY SCALE STRATEGIES
Best Practices Manual for Development in Coastal Louisiana
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STRATEGIES FOR COMMUNITIES
Prevent flooding
Build levees; Sediment diversion; Strengthen borders of flood prone areas;
Armor and fill
Adapt to occasional flooding
Develop community-wide approaches that adapt to occasional floodwaters;Develop resiliency; Minimize property damage from flooding
Relocate when absolutely necessaryRelocate part or all of a community to a more stable area
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Source: DeltaWorks.org
Bosch Slabbers
NetherlandsSeawall protecting against a storm surge
Sand Dunes(natural)
Prevent Flooding: Barriers
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Source: flickr.com/CLTS
Bangladesh
Retractable brick walls can be moved asnecessary to protect the community
Prevent Flooding: Barriers
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This aerial image illustrates the disparity between those who live inprotected upland communities and those who do not.
Avoid flooding
Adapt to flooding
Prevent Flooding
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Netherlands
CANALS allow for controlled flooding into pasture lands as needed
Adapt: Controlled Flooding
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Venice, Italy
Residents prepare for floodwaters
entering buildings and public spaces
Adapt: Accept Occasional Floodwaters
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Relocating part or all of a community away from flood danger
may be the best option in some scenarios
Cost to stay > cost to move
Use of temporary or low-cost structures
Seasonal or vacation inhabitation
Relocate
Mekong Delta, Vietnam:
As part of LIVING WITH FLOODS program, the Vietnamese
government has begun relocating flood-prone, high-riskcommunities to residential clusters on higher ground.
Po Delta, Italy
Abandoned fishing villages
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Isle de Jean Charles, Louisiana
Biloxi-Chitimacha-Choctaw tribe
Images: NOLA.com
After decades of frequent flooding, water
encroachment, and land subsidence, they faced the
painful decision of whether to stay or go.
Relocate
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BUILDING SCALE STRATEGIES
Best Practices Manual for Development in Coastal Louisiana
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Berm and armor
to protect structures and keep water out
Elevate with stilts or pole structureto move structures above floodwaters.
Flood proofing of buildingsso that they can be readily cleaned and returned to active use quickly.
Temporary structuresthat can be rebuilt with relative ease because of lower investment costs.
Floating structureseither permanently on the water or on land that can float when/if needed.
BUILDING SCALE STRATEGIES
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LOCAL ORDINANCEIMPLEMENTATION
Best Practices Manual for Development in Coastal Louisiana
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Focus on Flood Damage Prevention and
Stormwater Management & Natural
Resource Protection
Contains
Flood Damage Reduction
Stormwater Management
Parking and Site Access
Landscaping and Tree Preservation Borrow Pits
Outdoor Lighting
Outdoor Storage and Display
Signs
Natural Resource Protection
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ResidentialPublic Use
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Elevation Fortification
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APPLYING THE COASTAL TOOLKIT AND
MANUAL TOWN RESILIENCY PLAN
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Deltas are the best places to
live on earth if you can dealwith the water.
- Steven Slabbers