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6/4/2014
1
CHARLEVILLE FLOOD MANAGEMENT –
MOVING BEYOND MITIGATION
Emergency Management System
May 2014
Neil Polglase
David Murray
Murweh Shire, Queensland
• Land area of 43,905 km2
• Population
– Murweh Shire – 4,910
– Town of Charleville – 3,278
– Town of Augathella - 500
• Temperatures
– 15oC to 37oC during
the summer months
– 3oC to 25oC during the
winter months
• Wet season is typically January
through April
Town of Charleville, Murweh Shire,
Queensland Australia
The Warrego River Overtopped its Banks in
April 1990 and February 1997 with Little
Warning
In Response to 1990 and the 1997 Flooding, a
Levee along Warrego River was Constructed
In March 2010 the Town Floods Again via
Bradley’s Gully Tributary
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2
Following the 2010 Flood, Queensland
Government Funded Two Additional Flood
Mitigation Projects
• Construction of a second levee along Bradley’s Gully
• Project for flood and fire response planning
Warrego RiverWarrego RiverWarrego RiverWarrego River
Bradley’s GullyBradley’s GullyBradley’s GullyBradley’s Gully
Warrego RiverWarrego River
Bradley’s GullyBradley’s Gully
In February 2012 –Levee Saves Charleville From
Second Biggest Flood of Record
Five Major Floods were Recorded Since 1990
LocationEvent
(year)
Estimated Peak
Discharge (m3/s)Flood Mechanism
Warrego River
at Charleville1990 5470 No Levee – Major Warrego River Flooding
1997 2180No Levee – Repeat of significant Warrego River
Flooding
2010 1120 Levee Complete, minor River Flooding
2012 2750Levee Complete – Peaked at Crest of Levee,
No River Flooding
Bradley’s Gully
at Charleville2008 220 No significant flooding
2010 650Levee complete, but major flooding from behind
levee due to Bradleys Gully
2012 80 Levee holds, minor flooding from Bradleys Gully
Emergency Management System
• CDM Smith was selected to meet with Stakeholders and
develop approach to meet their needs
• First task order included: November 2012 – February 2013
– Onsite visit to review historical data & meet with stakeholders
– Collect relevant data from local and state agencies
– Develop scope of services to meet defined expectations and
be compliant with grant funding requirements
• Second task order included: February 2013 – May 2014
– Develop stormwater model for pilot area
– Develop Emergency Management System (EMS) flood tool
– Develop fire modeling plan
CDM Smith Worked with the Local Disaster
Management Group (LDMG) on Flood Response
Roles and Responsibilities for Disaster
Management
• Assist in the development of a local disaster management plan
• Assist with community outreach associated with preparing for an event
• Identification and coordination of resources for disaster recovery operations
Local Disaster Management Group (LDMG)
• Ensure disaster management operations are consistent with Queensland disaster management policies
• Develop and review disaster management policies and procedures
District Management Group (DMG)
• Develop a strategic policy framework for disaster management
• Develop and maintain protocols for effective disaster management arrangements between Queensland and the Australian Government
• Identify resources available within and outside of the State
• Provide recommendations to the Minister regarding matters related to disaster management operations
• Prepare and maintain the State Disaster Management Plan
State Disaster Management Group (SDMG)
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3
Selected LDMG Flood Response Components
• Develop stormwater model
covering the 47,000 km2 Warrego
River Catchment
• Develop Geographic Information
System (GIS) based decision
support system
– Leverage predicted and “real
time” rainfall and flood level data
– ArcMap document and
geodatabase platform
– Use LDMG protocols for
emergency response
Stormwater Model
Framework
• XP-SWMM 2012
– XP – Rafts commonly used in
Australia for flood studies
• Model resolution
– 107 subcatchments
– 242 model links
– 20 rainfall stations
• Model calibration & validation
– 2010, 2012 calibration
– 1997 validation storm
• Identified 15 “key” decision
locations
• Simulation goal < 15 minutes
Stormwater Model Calibration – Peak Stage
Station2010 2012
Observed Model Delta (m) Observed Model Delta (m)
Augathella 364.1 363.8 -0.3 365.7 365.4 -0.3
Charleville 294.4 294.5 0.1 295.5 295.6 0.1
Wyandra 235.6 235.6 0.0 235.9 235.9 0.0
Wallen 213.0 212.9 -0.1 213.1 213.2 0.1
Cunnamulla 186.8 186.8 0.0 186.7 186.8 -0.1
Raceview 325.9 326.1 0.2 326.1 325.7 -0.4
Charleville (BG) 295.3 295.1 -0.2 293.2 239.1 -0.1
Binnowee 281.2 280.9 -0.3 282.2 282.5 0.3
Stormwater Model Calibration – Peak Flow
Station2010 2012
Observed Model Delta (%) Observed Model Delta (%)
Augathella 104 106 1.9 755 659 -12.7
Charleville 1120 1135 1.3 2747 2620 -4.6
Wyandra 3163 2976 -5.9 3536 3450 -2.4
Wallen 2937 2905 -1.1 3517 3206 -8.8
Cunnamulla 1591 1553 -2.4 1552 1721 10.9
Raceview 305 276 -9.5 90 89 -1.1
Charleville (BG) 600 609 1.5 77 78 1.3
Binnowee 1432 1424 -0.6 3034 2710 -10.7
Flood Timing is Critical for Decision Making -
Stage
Flood Timing is Critical for Decision Making -
Flow
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4
Stormwater Model Validation Results
Station
1997 Stage (m AHD) 1997 Flow (cms)
Observed Model Delta (m) Observed Model Delta (%)
Augathella 365.4 365.4 0.0 657 641 -2.4
Charleville 295.2 295.3 0.2 2182 2087 -4.4
Wyandra 235.7 235.7 0.0 3324 3153 -5.1
Cunnamulla 186.6 186.8 0.2 1350 1655 22.6
Model Calibration Summary
• Model calibrated well to measured data at eight locations
throughout basin for flow, stage, and time
• Model verification of 1997 storm event also compared well
to measured data
• As a result, Murweh Shire staffs and the LDMG had
confidence in the model in predicting flood timing
and extent
Flood Response Planning
• Mission is to make proactive emergency preparedness
decisions
• Leverage rainfall and stage monitors
• Identify critical decision points for LDMG
– Time
– Location
– Response action
– Protocols
• Maximize use of
limited resources
Identified Emergency Response Activities
• Early warning systems
– Sirens, radio, and television
• Evacuations
– Land, air, and boat
• Road closures
• Sandbag support
• Police, fire, and
rescue assistance
• Air support
– supplies
• Request for additional assistance
from state and federal resources
Emergency Management System (EMS) Tool Analyze Storm Conditions
• Link to Weather Stations:
– Bureau of Meteorology
– South West NRM
• Use hyperlink tool for gage-
specific readings
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5
Building a Storm Event
• Leverage rainfall
predictions from
Bureau of
Meteorology
• Define hydrologic
conditions
– Aerial reduction
– Individual rain
gauge
• EMS tool builds XP-
SWMM runoff data
set
Antecedent moisture
condition
Storm duration
Storm center
Storm volume
Apply aerial reduction
Storm direction and speed
Process Storm Data
The Process Storm Data
button will write the results
to the gage feature class
Export XPX File
The Export Storm to XPX will write the output file
to be read by XP-SWMM
Modeling the Storm
Load Rainfall Data
Import Model Results
• Extract the node elevation data from XP-SWMM
Import Model Results
• Import results to geodatabase
• Generates hydrograph tables
• Analyzes Critical Locations
6/4/2014
6
Analyzing the Results
• Options for viewing results
– Generate critical locations report
– Built-in standard ESRI ArcMap
functions
– Individual critical locations report
– View hydrograph
– Actions Dashboard
Critical Locations Report Using ESRI Report
Engine and XP-SWMM Model Results
Defined by BOM
Viewing Results with Standard ESRI
ArcMap Tools
Flood Hydrographs Can Be Viewed for the
Selected Locations
Individual Critical Locations Report
• Subset of each “key” location defined
for the Warrego River Cachment
• Decision points defined by LDMG
The EMS Dashboard Stores “Pre-filled” Forms
Necessary for Approval and Reimbursements
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7
Closing Remarks
• Proactive response planning tool when manpower resources
are limited
– Estimated time available to respond to a flood threat
• Integrated into LDMG annual training held in November 2013
• Future discussions
– Additional decision support management
– Refinement of aerial reduction methods
– Integration into the Qit Plus “Guardian” emergency
management system used throughout Australia
– Digital integration of “live” rainfall data
Acknowledgment of Key Team Members
• Mr. Neil Polglase – Murweh Shire
• Mr. Allan Pemberton – Murweh Shire
• Mr. Brian Mack – CDM Smith
• Mr. Evan O’Brien – CDM Smith Australia
• Mr. Tom Nye, Ph.D, P.E. – CDM Smith
• Mr. Mark Zito, GISP – CDM Smith
• Mr. Seenu Anandam, P.E. – CDM Smith
• Mr. Mike Schmidt. P.E. – CDM Smith
DISCUSSION AND QUESTIONS
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