NORTH CAROLINA LANDSLIDE MAPPING – PUBLIC AND …€¦ · · 2015-06-08NORTH CAROLINA LANDSLIDE...
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NORTH CAROLINA LANDSLIDE MAPPING – PUBLIC AND PRIVATE PROGRAMS Jennifer Bauer, L.G. – Principal Geologist Stephen Fuemmeler, L.G. – Principal Geologist
Transcript of NORTH CAROLINA LANDSLIDE MAPPING – PUBLIC AND …€¦ · · 2015-06-08NORTH CAROLINA LANDSLIDE...
NORTH CAROLINA LANDSLIDE MAPPING – PUBLIC AND PRIVATE PROGRAMS
Jennifer Bauer, L.G. – Principal Geologist Stephen Fuemmeler, L.G. – Principal Geologist
NORTH CAROLINA LANDSLIDE HAZARD MAPPING
Maps by ALC and NCGS
Macon
Buncombe
Henderson
Watauga
Haywood
Jackson
Status
Mapping Process
Funding
NCGS Program Triggers
PROGRAM TRIGGERS
Rain! • Tropical Systems
Frances and Ivan • >15 inches of rain each
within 2 weeks
Presenter
Presentation Notes
Over 400 landslides were triggered by the remnants of Hurricanes Frances and Ivan in September of 2004. After the initial assessment, the NC legislature pass the Hurricane Recovery Act of 2005, authorizing the creation of the NC Geological Survey Landslide Hazard Mapping Program. The intent of this program was to make people more aware of landslide hazards in the mountains, and to provide a tool for planning and emergency management.
Acknowledgements: Tommy Douglas, Ken Gillon, Anne Witt, Rick Wooten, Rebecca Latham (NP)
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Funding to map 19 western counties, or as many as we could in 3 years initially
FUNDING – BEGINNING OF THE END
• 2007 Safe Artificial Slope Construction Act introduced in the State General Assembly • Linked maps to regulations • Questions about disclosure in Real Estate
transactions • Never approved, but changed perception
FUNDING – MIDDLE OF THE END
• 2010 Elections • Change in majority ideologies in the General
Assembly toward less government involvement
FUNDING – THE END
• 2011 Budget Shortfalls • Recession impacted NC budget – must be
balanced • Growing opposition to the maps due to
misunderstandings • Perhaps politics
Stability Index Map – where landslides might start
Potential Debris Flow Pathways Map – where landslides might go
Slope Movements - Slope Movement Deposits Map – where landslides have occurred or are occurring.
MAPPING PROCESS - GENERAL
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Presentation Notes
Maps are available from Buncombe County GIS and from NCGS. ALC can provide information for specific locations as well as detailed information on how the maps were made and what they show. Mapped Buncombe, Macon, Watauga, Henderson
MAPPING PROCESS – COMMUNICATION
• Kick-off meetings with county planning board, Emergency Managers, Soil and Erosion Control staff, and others
• Talk to landowners during field mapping • External map and field review by members of the landslide
research community or county personnel • Presentation of final maps to county, their guests, and
Emergency Management • Training workshop for county GIS staff
STATUS - BUNCOMBE COUNTY
Presenter
Presentation Notes
Purple is less scarry
STATUS - MACON COUNTY
“an arbitrary and fruitless endeavor that will do little to actually predict where a slide might hit in the future” – Planning Board member
Material fact?
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Presentation Notes
2011 news article, one member of the County planning board said he didn’t understand how the maps were made and was hesitant to take them at face value. He said he saw landslide mapping as “an arbitrary and fruitless endeavor that will do little to actually predict where a slide might hit in the future
Map from NCGS
STATUS - WATAUGA COUNTY
Map from NCGS
STATUS - HENDERSON COUNTY
Presenter
Presentation Notes
The Stability Index Map shows locations where debris flows may start in response to a high rainfall event (> 5 inches/24 hours) on unmodified (i.e., natural) slopes. The color codes indicate the relative stability and the generalized hazard rankings depicted on the map. The Stability INdex MAP was constructed using the “SINMAP” GIS software developed by Pack and others (1998). Pack, R. T., Tarboton, D. G., and Goodwin, C. N., 1998, Terrain stability mapping with SINMAP, technical description and users guide for version 1.00: Terratech Consulting Ltd., Salmon Arm, B. C., Canada, Report Number 4114-0, 68 p.
Status
Mapping Process
Funding
Private-Non-profit Program Triggers
PROGRAM TRIGGERS
• Ending of NCGS Program • Champion on Non-Profit Water Quality
Association board • Passion to continue helping WNC citizens
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Presentation Notes
Water quality champion
FUNDING – WATER QUALITY
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Presentation Notes
Water quality champion
FUNDING – WATER QUALITY
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Presentation Notes
Ghost town failure ~27,500 cy sediment from this failure. Typical emb failure 300cy.
FUNDING • Economical
• Average cost of home in 2012 in WNC ~ $285,000
• Saving one home would pay mapping an entire county
• Mapping included subsidence points
FUNDING • Smaller, more easily
fundable pieces • Separated phases of
Inventory and Susceptibility mapping
MAPPING PROCESS - GENERAL Geologic Stability Mapping Project
• Stakeholder meetings
• Grant applications
• Outreach
• Rain!
• Landslide Inventory
• Stakeholder meeting
• Grant applications
• Susceptibility mapping
• Outreach
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Presentation Notes
Shy away from using “Landslide”
MAPPING PROCESS - COMMUNICATION
• Stakeholder meetings • County
• Commissioners
• Planning board
• Emergency Management
• Erosion Control
• Soil and Water Conservation
• Towns
• Mayor
• Managers
• Planning
• Board of Realtors
• Homebuilders Association
• Non-profits
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Presentation Notes
Concerns brought up at the first stakeholders meeting about scaring people with the models, devaluing property. Did research, contacted counties where mapping had been done. Asked questions about how they were used, value of property, mortgages. Send these compiled answers to stakeholders to give them data to answer their questions.
MAPPING PROCESS - COMMUNICATION
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Needed info brochure to give to people when doing field work. Brochure collab between us, NCGS, NWS
STATUS
http://appalachianlandslide.com/landslide-hazard-maps/
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with User’s guide
STATUS
STATUS • Continue looking for funding – currently no local or state funding
• Cycles: politically, non-profit board members, grant funding • Continued outreach efforts
LESSONS LEARNED
• Communication – tailored to current ideological trends • “What’s in it for me” message for audience • Personal connections through outreach • Community champion • Open to opposition, quick, respectful and factual
response
End User Project Awareness
Consistent messages, various means
Memories are short
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Presentation Notes
Whether mapping one parcel, sub-watershed, one county, or one state, for the mapping to be effective in saving lives and property, the end users must be aware of the project from the beginning. Most often we see public interest in landslides peak just after a natural disaster, but they quickly forget not long after the event. As stakeholders in promoting the science, benefits, and use of landslide susceptibility maps, we must work to consistently spread our message the public and those who communicate to them.
