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Visualizing Hazards Using GIS: The Buncombe County Multi-Hazard Risk Tool
Todd Pierce, RENCI at UNC Asheville 04.28.10
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RENCI Statewide Mission - “To deliver technology and research from the UNC campuses to the people of the state of North Carolina.”
RENCI at UNC Asheville Engagement Center
“Decision Support tools for Flood Mitigation, Emergency Response and Water Resource Issues”Based at UNC Asheville’s NEMAC
Introduction: What is RENCI?
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UNC Asheville’s National Environmental Modeling and Analysis CenterApplied Research and Technology development on integration of environmental and climate data sets
Data and GISVisualizationDecision MakingScience Communication
Active Undergraduate Research Collaboration among government, academia and private enterprise
Introduction: What is NEMAC?
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Introduction: Overview
The Problem
The Process
The Product
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The Problem
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The Problem
Buncombe County experiences multiple natural hazardsThe County Emergency Operations Center (EOC) must submit to Federal Emergency Management Agency (FEMA) an updated hazard mitigation plan every five years for the CountyThe County’s six towns also submit plansEOC staff wanted a GIS solution to streamline the process and generate maps and reports
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The Process: Design
Tool was designed to assist with updating the County’s hazard mitigation plan for FEMA
Determine spatial extent of hazards and their impact on property and infrastructureDetermine property value possibly affected by the hazards
Tool design resulted from several meetings with Angela Ledford, deputy director of Buncombe County EOC, and other planners from Buncombe County and City of Asheville
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EOC Planner,City Engineer,Responder
Developer,Realtor,Banker
GeneralPublic
2.Communication
of Risk
4.Scenario Planning
4a.Verification of
DeveloperPlans
3.Assessment
of Risk
1.Determination
of Risk
The Process: Use Cases
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EOC Planner,City Engineer,Responder
Developer,Realtor,Banker
GeneralPublic
2.Communication
of Risk
4.Scenario Planning
4a.Verification of
DeveloperPlans
3.Assessment
of Risk
1.Determination
of Risk
The Process: Use Cases
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Parcel List Summary Chart
The Process: Original Concept
Iterative Development Process
PowerPoint mockup
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The Process: First DesignArcGIS Server serves map layersArcGIS Server API for JavaScript and Dojo
Iterative Development Process
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The Process: Current DesignArcGIS Server serves map layersArcGIS Server API for Flex
Iterative Development Process
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The Process: Implementation
Tool was rolled out to County, its six towns, and the Asheville Fire Department in March 2009, and training providedTool used by County and towns to update mitigation planTool used by Asheville Fire Department for planning and to help with their agencyre-accreditation
Weaverville
Montreat
Black Mountain
Woodfin
Biltmore Forest
Asheville
Buncombe County
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The Product: Description
Online application – can be accessed from any machine with Internet Explorer or FirefoxDisplays map layers in a GIS-like interface –no GIS needed by userMany GIS layers - infrastructure, land use, topography, climate, population, hydrography
Wildfire risk by parcel
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The Product: Description
Supports five hazards – flood, wildfire, dams, winter storms, landslides Generates reports on property value at riskData from trusted sourcesPassword protectedPublic version, withsensitive dataremoved, goeslive in May
Value of parcels in floodway
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The Product: Technical Details
Tool uses ArcGIS API for FlexTool built using Adobe Flex Builder 3GIS data stored in ArcSDE databases and served online by ArcGIS ServerModelBuilder and Python used to process county parcels every two weeks and intersect them with hazards to create needed layersProperty value reports generated using ColdFusion to query the parcel layer attribute table
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The Product: Tour of the Tool
Login Screen
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Map
Layer list
Legend
Tools
Navigation
Map with Tools
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Checkbox
Transparency
Map Layer Controls
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Map Images, Views, and Zooms
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Flood Layers
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Flood Reports – Parcel Count
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Flood Reports – Parcel Value
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Flood Reports – Excel Export
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Flood Reports – Metadata
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Landslide Layers
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Landslide Reports
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Wildfire Layers
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Wildfire Reports
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Identify Tool with Parcel Links
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Find and Print Tools
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Yellow = 1 minRed = 5 minGreen = 10 minBlue = 15 min
Drive Times Tool
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Full screen
Google Streetview Link
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Help and MetadataContinue
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Improve risk modelsFlood model needs flood depths, building locations and elevations, when such data availableLandslide model needs frequency of rain eventsDam model needs to be based on approved models
Add other hazards such as tornado, earthquake, utility failures, hazardous material spills, or drought
The Product: Continuing Development
Earthquake near Hot Springs, NC
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Add future build-out scenarios to show if new development would be at riskExpand transportation planning usesImplement in other counties?Bring tool to other users
PlannersDecision MakersGovernment OfficialsCommercial Interests: developers, realtors, bankers, insurance agentsGeneral Public
The Product: Continuing Development
By considering all groups, the tool can bring together disparate audiences and have them make decisions based on the same shared information.
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Risk Tool shows the power of using online GIS for hazard planning and risk mitigationMany users in County and towns were able to access GIS data that otherwise was not available to them, or that required use of unavailable GIS packagesHazard mitigation plans updated through use of tool - better data was provided more quickly than by using previous processConsiderable interest from other towns, fire departments, and counties in the Risk Tool
Conclusion [email protected] Pierce