1. Overview of HAZUS for Flood Loss Estimations
October 7, 2011

2. What is HAZUS?
Risk assessment tool for analyzing potential losses from hurricane, flood, and earthquake
Uses current scientific and engineering concepts in a GIS to estimate hazard related damages
HAZUS is only an estimation tool for losses due to a disaster and could be significantly different from an actual event
Flood module includes analysis for riverine and coastal studies.

3. Loss Estimate Process Produce maps, tables, reports
Analyze social and economic impacts
Consider what is at risk
Identify hazard
Identify physical

4. How does HAZUS calculate damages?
HAZUS Flood uses depth/damage curves developed by USACE and other agencies to determine damage to a building based on the flood depth
HAZUS calculates
Losses to buildings and their content and inventory (businesses) value
Debris generation from building damages
Displaced population (used to identify evacuation routes and shelter requirements)
Agriculture Losses due to flooding
Damage to essential facilities (police, fire, medical, schools, and EOC’s)
Damage to transportation facilities (ports, ferry facilities etc.)
HAZUS Flood

5. HAZUS Analysis Levels

6. HAZUS Inputs for Flood
Level 1 Analysis (For areas with no existing flood data)
Single Discharge or return period (i.e. 100 year discharge is 13,500 cfs or 1% change return period)
Elevation data (DEM, LiDAR etc.) *Needed for all analysis levels
Out of the box HAZUS data
Levee 2 Analysis (Ideal analysis level)
Flood Information tool (generates depth grid from water surface elevation and elevation data. *water surface elevation available through flood insurance study)
Depth grid generated outside of HAZUS using HEC-RAS, FLO-2D etc.
HEC-RAS depth grids are directly input into HAZUS.
User update general building stock, essential facilities, transportation, etc.
Level 3 Analysis (Engineering specific data)
Updated engineering building data
Update depth/damage curves

7. HAZUS Inputs for Flood
Level 1 Analysis (For areas with no existing flood data)
Single Discharge or return period (i.e. 100 year discharge is 13,500 cfs or 1% change return period)
Elevation data (DEM, LiDAR etc.) *Needed for all analysis levels
Out of the box HAZUS data
Levee 2 Analysis (Ideal analysis level)
Flood Information tool (generates depth grid from water surface elevation and elevation data. *water surface elevation available through flood insurance study)
Depth grid generated outside of HAZUS using HEC-RAS, FLO-2D etc.
HEC-RAS depth grids are directly input into HAZUS.
User update general building stock, essential facilities, transportation, etc.
Level 3 Analysis (Engineering specific data)
Updated engineering building data
Update depth/damage curves

8. Where do I find data for use in HAZUS?
Local parcel/assessors data can be input into HAZUS. The following data is required for each parcel:
Building replacement value (typically use building improvement value). *Assessed values should not be used.
Building square footage
Building type (residential, commercial, industrial etc. )
Building count (per parcel)
Elevation data (DEM’s, LiDAR etc.) can be found from various sources such as:
National
USGS Seamless Data Warehouse (
FEMA Regional Office
Regional
Puget Sound LiDAR Consortium (
Oregon LiDAR Consortium (
Idaho LiDAR Consortium (
Local Datasets

9. Where do I find data for use in HAZUS?
FEMA Flood Insurance Studies
Discharges and frequencies
FEMA Flood Insurance Studies
Hydrologic and Hydraulic Flood Models generate water surface elevations (*available where a detailed flood study was preformed)
Water surface and elevation data can be used to generate a flood depth grid
Depth grids can be exported from HEC-RAS and FLO-2D
Other engineering flood studies

10. RiskMAP Deliverables
Each RiskMAP Study will include flood depth grids for the 10, 50, 100, and 500 year flood frequencies
All flood studies starting from 2009 onward will generate depth grids for any detailed study areas
Level 1 HAZUS Analysis will also be completed in deliverable

11. How Do I Run HAZUS?
A study region is created first in HAZUS which can be at a state, county, city, census tract, census block level
HAZUS Flood determines losses at a census block level
A building specific analysis can be run in HAZUS, but requires additional building data such as first floor elevation
Flood data is input into the model (single discharge and DEM, depth grid, HEC-RAS output)
Analysis is run for various building types, facilities, debris generation, displaced population etc.
Extract output and display data using ArcGIS

12. HAZUS Outputs

13. HAZUS Outputs

15. Essential Facilities

16. Uses for HAZUS Output Disaster Response
HAZUS Flood events can be pre-run for use during disaster response
Pre-run flood events allow emergency management to stage resources where the highest damaged is modeled to occur
Single discharge can also be input into HAZUS based on stream gage information during the event

17. Uses for HAZUS Output Hazard Mitigation Planning
HAZUS output can be incorporated into a Hazard Mitigation Plan
HAZUS can identify hazard mitigation strategies
*Tables were take from the Snohomish County Hazard Mitigation Plan located at

18. Uses for HAZUS Output Community Planning Future Development
Preparedness
Exercises
Validation Studies

19. Other Resources for HAZUS
FEMA HAZUS Website -
HAZUS User Group Information -
Washington HUG contact Kelly Stone,
Idaho HUG contact Ryan McDaniel, or Chris Corwin,
Alaska and Oregon information contact Jennifer Monroe,
Washington State Emergency Management Division
Allen Jacobitz, or Jamie Mooney,
Idaho Bureau of Homeland Security
Mark Stephensen,
FEMA Regional Office –
HAZUS POC and Elevation Acquisition, Kelly Stone,
Study information for WA – Kelly Stone, ID – Amanda Engstfeld, OR and AK, Jennifer Monroe,

20. HAZUS Training - Online
ESRI Virtual Campus – search for ‘Hazus’
Examples
Hazus-MH for Decision Makers
Basic Hazus – 12 courses (Fall/Winter 2011)
Introduction to CDMS
User Defined Flood Hazard
Cost ranges from free to $32

21. HAZUS Training - Classroom
Training available at FEMA’s Emergency Management Institute,
Funding is available for all expenses for State and Local governments
Training available is as follows:
E190 ArcGIS for Emergency Managers
E313 Basic Hazus-MH
E170 Hazus-MH for Hurricanes
E172 Hazus-MH for Floods
E174 Hazus-MH for Earthquakes
E296 Using Hazus-MH for Risk Management
E176 Hazus for Floodplain Managers
E179 Applications of Hazus-MH for Disaster Operations
E317 Comprehensive Data Management for Hazus-MH

22. Contact and Upcoming Training
Kelly S. Stone, Risk Analyst, FEMA Region X
WA HUG Call – November 3, :00-10:00am
Call-in #
PIN , then press #
Call information available on
Overview of HAZUS for Earthquake Loss Estimations (Online)
October 28, am
Registration required