the peterborough flood – from the inside...the july 2004 weather event • july 14 –15, 2004 •...
TRANSCRIPT
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THE PETERBOROUGH FLOOD –FROM THE INSIDE
David Burritt, P.Eng.Otonabee Region Conservation Authority
May 2008
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AGENDA
• The City• The Flood Event• The Impacts• Observations on:
– Communications– Emergency Preparedness– Forecasting and Analysis
• Recap
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Source: City of Peterborough GPAEDC
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THE JULY 2004 WEATHER EVENT
• July 14 –15, 2004• Forecast: 40-70 mm in (24 hours)• Actual: 130 – 250 mm (40 hours)• 220 mm in 9 uninterrupted hrs rainfall• 14 billion litres of water fell in 5 hours
– Equivalent Niagara Falls flow in 40 minutes– Fill Sky Dome 9 times
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TOTAL RAINFALL – CITY SCALE
From: Kiji Sipi, 2005
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IMPACTS
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OBSERVATIONS:-Communications-Emergency Preparedness-Forecasting and Analysis
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Communications
COMMUNICATIONS
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COMMUNICATIONS SUMMARY
• Must be clear, accurate and fast• Provide efficient operating space • Train staff before events• Benefits:
– efficient operations– less unnecessary stress on staff– business continuity
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EMERGENCY PREPAREDNESS
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EMERGENCY PREPAREDNESS SUMMARY
• Provide efficient operating space • Develop emergency plans• Train staff before events• Benefits:
– efficient operations– less unnecessary stress on staff– Improved public confidence– Increased potential for funding
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FORECASTING AND ANALYSIS
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RAINFALL EVENT RETURN PERIODS
0
5
10
15
25
50
100
Return Period(Year)
Stony Lake
BuckhornLake
SandyLake
Norwood
Millbrook
Lakefield
Peterborough
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FORECASTING & ANALYSIS SUMMARY
• Rainfall volumes from severe storms can’t be reliably forecasted
• Rely on predictive techniques• Need Monitoring networks –rain and water
levels• Benefits:
– More reliable forecasts and process for uncertainty– Monitor actual field conditions; advance warning
of potential exceedances– Define vulnerability in urban areas –develop plans
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RECAP
• Up to 70mm forecasted but 250mm received
• Communications – invest in physical space and training
• Emergency Preparedness – invest in physical space, training and good plans
• Forecasting and Analysis – need predictive techniques and monitoring networks
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Questions??
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JACKSON CREEK RIVER LEVELS - July 14-16
0.00
0.50
1.00
1.50
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2.50
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3.50
4.00
4.50
12:0
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6:00
:00
12:0
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18:0
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12:0
0:00
AM
6:00
:00
12:0
0:00
18:0
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12:0
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AM
6:00
:00
12:0
0:00
18:0
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Date & Time
Wat
er L
evel
(m
) BANKFULL LEVEL