may 17, 2011 true flood loss analysis: integrating both depth grid and specific building inventories...
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May 17, 2011
True Flood Loss Analysis: Integrating Both Depth Grid and Specific Building Inventories
Jason Rutter, CFMCoreLogic
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Overview
1. Concept – Data Enhancements
2. Level I Results – Tulsa, OK
3. Impact of Enhanced Depth Grids
4. Impact of Enhanced Property Information
5. Level II+ Results – Tulsa, OK
6. Additional Benefits of Analysis
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Concept
HAZUS Level I
Depth Grid
HAZUS Level II+
Property Data
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Data Enhancements
Depth Grid – PTS
Property Data – local and county records
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HAZUS Level I Results – Tulsa, OKSettings:• 100 Year Return Period• 10 Mile drainage Area• 10 Meter DEM
Economic Loss From Building Damage
$390,052,000
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Data Enhancement – RAMPP Depth GridDepth Grid Comparison – County Area Coverage• HAZUS Level I: 17.8% (Red)• RAMPP Depth Grid: 18.8% (Blue)
Results• HAZUS Level I: $390,052,000• RAMPP Depth Grid: $452,198,000
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Detailed Property Locations
Selection Criteria:• HAZUS Level I Flood Zone Area• HAZUS Level II+ Flood Zone Area• Buffers
Properties Selected
• Total Properties: 33,973• Structures: 24,522• Vacant: 9,451
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Importing Properties Into HAZUS
Imported Properties: 24,522
• Extracted from National Database – 200 standardized fields• Aggregated land use codes• Calculations and Assumptions (foundation type, first floor height)• Create a HAZUS ready access file
Improvement Value Cost
Living Area Sq Ft SqFt
Year Built YrBuilt
Number of Stories NumStories
Mobile Home Indicator “RES2”
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Impact of Enhanced DataHAZUS Level I RAMPP Depth GridStructures: 12,099 (above HAZUS limits) Structures: 4,964
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HAZUS Level II+ Results – Tulsa, OK
• Structures Impacted: 4,964• Estimated Building Damage: $82,501,947• Average Building Damage: $16,520
LEVEL I and LEVEL II Comparison
Damage Estimate Number of Buildings
LEVEL I $390,052,000 NA
LEVEL II+ $82,501,947 4,964
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HAZUS Level I vs. Level II+
HAZUS Level I
Damage = $1,973,000
HAZUS Level II+
Damage = $119,599
Structures = 4
Vacant Properties = 9
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HAZUS Level I vs. Level II+
HAZUS Level I
Damage = $4,486,000
HAZUS Level II+
Damage = $1,338,372
Structures = 18
Vacant Properties = 12
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HAZUS Level II+ Results – Market ValuesCalculated using Automated Valuation Models (AVM)
• Properties with Market Values Calculated – 75%
• Market Values v. Assessed Value
• 112% Increase
• HAZUS Level II+ Market Value Losses
• Estimated Losses = $ 92,377,065
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Benefits1. More Accurate Aggregate Values
Average Annualized Loss (AAL) Adjustments Post Disaster Funding Estimates
2. Identification of Properties At-Risk Mitigation Programs Outreach NFIP Insurance Take Rate Analysis
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Summary
1. HAZUS has the ability to process thousands of individual properties when provided enhanced data. Requires a transition to new uses of HAZUS.
2. Enhancing HAZUS with additional data requires comprehensive, standardized attribution.
3. Accurate, representative loss analysis requires property locations to accurately represent local geographic build patterns.
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Questions
Jason Rutter, CFMCoreLogic
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