6/4/2014
Neil Polglase David Murray
Murweh Shire, Queensland
May 2014
••
Land area of 43,905 km2 Population
CHARLEVILLE FLOOD MANAGEMENT –
MOVING BEYOND MITIGATION
Emergency Management System
– 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
The Warrego River Overtopped its Banks in April 1990 and February 1997 with Little Warning
Town of Charleville, Murweh Shire, Queensland Australia
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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6/4/2014
Following the 2010 Flood, Queensland Government Funded Two Additional Flood Mitigation Projects
In February 2012 –Levee Saves Charleville From Second Biggest Flood of Record
•
Construction of a second levee along Bradley’s Gully
•
Project for flood and fire response planning
Warrego River
Bradley’s Gully
- Five Major Floods were Recorded Since 1990
- Emergency Management System
••
CDM Smith was selected to meet with Stakeholders and develop approach to meet their needs
Event Estimated Peak
- Location
- Flood Mechanism
(year) Discharge (m3/s)
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
Warrego River at Charleville
1990 1997 2010 2012 2008 2010 2012
5470 2180 1120 2750 220
No Levee – Major Warrego River Flooding No Levee – Repeat of significant Warrego River Flooding
– Develop scope of services to meet defined expectations and be compliant with grant funding requirements
Levee Complete, minor River Flooding Levee Complete – Peaked at Crest of Levee, No River Flooding
•
Second task order included: February 2013 – May 2014
– Develop stormwater model for pilot area
Bradley’s Gully at Charleville
No significant flooding Levee complete, but major flooding from behind levee due to Bradleys Gully
650
– Develop Emergency Management System (EMS) flood tool – Develop fire modeling plan
- 80
- Levee holds, minor flooding from Bradleys Gully
CDM Smith Worked with the Local Disaster Management Group (LDMG) on Flood Response
Roles and Responsibilities for Disaster Management
Local Disaster Management Group (LDMG)
• 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
District Management Group (DMG)
• Ensure disaster management operations are consistent with Queensland disaster management policies
• Develop and review disaster management policies and procedures
State Disaster Management Group (SDMG)
• 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
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Stormwater Model Framework
Selected LDMG Flood Response Components
•
XP-SWMM 2012
••
Develop stormwater model covering the 47,000 km2 Warrego River Catchment
–
XP – Rafts commonly used in Australia for flood studies
•
Model resolution
Develop Geographic Information System (GIS) based decision support system
–––
107 subcatchments 242 model links 20 rainfall stations
– Leverage predicted and “real time” rainfall and flood level data
•
Model calibration & validation
––
2010, 2012 calibration 1997 validation storm
– ArcMap document and geodatabase platform
••
Identified 15 “key” decision locations
– Use LDMG protocols for emergency response
Simulation goal < 15 minutes
- Stormwater Model Calibration – Peak Stage
- Stormwater Model Calibration – Peak Flow
2010
Model 363.8 294.5 235.6 212.9 186.8 326.1 295.1 280.9
2012
Model 365.4 295.6 235.9 213.2 186.8 325.7 239.1 282.5
- 2010
- 2012
Station
Station
Observed
364.1 294.4 235.6 213.0 186.8 325.9 295.3 281.2
Delta (m)
-0.3 0.1
Observed
365.7 295.5 235.9 213.1 186.7 326.1 293.2 282.2
Delta (m)
-0.3 0.1
Observed
104
Model
106
Delta (%)
1.9
Observed
755
Model
659
Delta (%)
-12.7 -4.6
Augathella Charleville Wyandra
Augathella Charleville Wyandra
1120 3163 2937 1591 305
1135 2976 2905 1553 276
- 1.3
- 2747
3536 3517 1552
90
2620 3450 3206 1721
89
- 0.0
- 0.0
-5.9
-1.1 -2.4 -9.5 1.5
-2.4
- Wallen
- -0.1
0.0
0.1
- Wallen
- -8.8
Cunnamulla
Raceview
-0.1 -0.4 -0.1 0.3
Cunnamulla Raceview
10.9 -1.1
0.2
Charleville (BG) Binnowee
-0.2 -0.3
Charleville (BG) Binnowee
- 600
- 609
- 77
- 78
- 1.3
- 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
- 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
- 1997 Stage (m AHD)
- 1997 Flow (cms)
Station
- Observed
- Model
365.4 295.3 235.7 186.8
- Delta (m)
- Observed
657
Model
641
Delta (%)
-2.4
As a result, Murweh Shire staffs and the LDMG had confidence in the model in predicting flood timing and extent
Augathella Charleville Wyandra
365.4 295.2 235.7 186.6
0.0 0.2 0.0 0.2
- 2182
- 2087
3153 1655
-4.4
- 3324
- -5.1
- Cunnamulla
- 1350
- 22.6
- Flood Response Planning
- Identified Emergency Response Activities
•
Mission is to make proactive emergency preparedness decisions
••
Early warning systems
– Sirens, radio, and television
Evacuations
– Land, air, and boat
Road closures
••
Leverage rainfall and stage monitors Identify critical decision points for LDMG
•••
– Time
Sandbag support
– Location
Police, fire, and rescue assistance
– Response action – Protocols
••
Air support
– supplies
•
Maximize use of limited resources
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 gagespecific readings
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- Building a Storm Event
- Process Storm Data
Antecedent moisture condition
•
Leverage rainfall predictions from Bureau of
The Process Storm Data button will write the results to the gage feature class
Storm duration
Meteorology
•
Define hydrologic conditions
Storm center
– Aerial reduction
Storm volume
– Individual rain
gauge
Apply aerial reduction
Storm direction and speed
•
EMS tool builds XP- SWMM runoff data set
- Export XPX File
- Modeling the Storm
The Export Storm to XPX will write the output file to be read by XP-SWMM
Load Rainfall Data
- Import Model Results
- Import Model Results
•
Extract the node elevation data from XP-SWMM
•••
Import results to geodatabase Generates hydrograph tables Analyzes Critical Locations
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Critical Locations Report Using ESRI Report Engine and XP-SWMM Model Results
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
Defined by BOM
Viewing Results with Standard ESRI ArcMap Tools
Flood Hydrographs Can Be Viewed for the Selected Locations
The EMS Dashboard Stores “Pre-filled” Forms Necessary for Approval and Reimbursements
Individual Critical Locations Report
••
Subset of each “key” location defined for the Warrego River Cachment Decision points defined by LDMG
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- Closing Remarks
- Acknowledgment of Key Team Members
•
Proactive response planning tool when manpower resources are limited
••••••••
Mr. Neil Polglase – Murweh Shire Mr. Allan Pemberton – Murweh Shire Mr. Brian Mack – CDM Smith
– Estimated time available to respond to a flood threat
••
Integrated into LDMG annual training held in November 2013 Future discussions
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
– 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
DISCUSSION AND QUESTIONS
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