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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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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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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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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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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

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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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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