managing flood risk of mirrool creek –lessons …...northern branch canal breach, yenda june 1931...
TRANSCRIPT
14/07/2017
1
Managing Flood Risk of Mirrool CreekLessons Learnt from Past Floods
Graham Gordon
Griffith City Council
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Mirrool Creek• Catchment of
11,000 km2
• Starts 15 km west of Temora, extends west
and connects to the Lachlan
River• Covers a
distance of
approximately 250 km.
EMR
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Village of Yenda
June 1931
14/07/2017
2
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Griffith to Leeton Railway Line
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Whitton Stock Route, Yenda
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Supply Canal breach, Yenda
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Northern Branch Canal breach, YendaJune 1931
14/07/2017
3
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
East Mirrool Regulator, Yenda
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Mirrool Creek Flooding, Yenda
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
• Flood gates were installed at the East
Mirrool Regulator (EMR) after the
1931 flood event.
• Decommissioning of the EMR flood
gates occurred in the early 1990’s.
14/07/2017
4
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Flood gates was installed at EMR but later it was
decommissioned may be due to draught?
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
March 2012 Flood
14/07/2017
5
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Whitton Stock Route, Yenda
June 1931
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Whitton Stock Route, Yenda
June 1931
Whitton Stock Route, Yenda
March 2012
14/07/2017
6
EMR SiphonsFlood Gates
NBC Offtake
Main Supply Canal
Mirrool Creek U/S
EMR Siphons
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
• Flood Study completed in 2014
• Floodplain Risk Management
Study & Plan completed in 2015
• No structural flood mitigation
measures put in place
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
2016 Flood Events
14/07/2017
7
14/07/2017
8
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
2016 Flood Management Strategy
14/07/2017
9
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
14/07/2017
10
Managing Flood Risk of Mirrool Creek – Lessons Learnt
from Past Floods
• Team work and shared responsibility of
Council, MI, SES and Community
• Yenda Village saved from flooding
• Positive feedback from the Community
Implementing Mitigation Measures
• Mirrool Creek Flood Warning System
• Mirrool Creek Flood Forecasting System
• Emergency Breaching Protocols
• Seeking Funding to reinstate the
decommissioned Flood Gates at the EMR
Thank You Questions?