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Flood Management and Recovery 2011 Loddon and Campaspe flood Phillip Hoare Manager Business Services Goulburn-Murray Water.

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Presentation on theme: "Flood Management and Recovery 2011 Loddon and Campaspe flood Phillip Hoare Manager Business Services Goulburn-Murray Water."— Presentation transcript:

1 Flood Management and Recovery 2011 Loddon and Campaspe flood Phillip Hoare Manager Business Services Goulburn-Murray Water

2

3 Tullaroop Reservoir – photo taken of outlet tower on 9 September Storage level is 100%. Tullaroop Reservoir – photo taken of outlet tower on 5 July Storage level ~ 4%. Recent history

4 Approx 60% chance of exceeding median rainfall in Nov-Jan period Median rainfall for Loddon catchment is 88 mm Total rainfall received during Nov-Jan period was 397 mm at Cairn Curran 97.8 mm fell on 14 Jan Bureau of Meteorology forecasts

5 Overview Major areas of concern were quickly evident Lake Eppalock % rainfall in December/January Cairn Curran 93% - air space only approx 10,000ML Record flows passing storages on both systems Major impacts d/s communities & irrigation areas a certainty

6 The ‘Inland Sea’

7 State arrangements for emergency management Victorian State Emergency Services (SES) lead agency –Responsibility to coordinate emergency response Bureau of Meteorology (BoM) –Responsible for flood warnings Municipal Councils –Responsible for community awareness, information systems, identifying and treating risks Water Authorities (G-MW) –Operating assets appropriately

8 Campaspe system Lake Eppalock – 304,650ML capacity Fixed crest spillway Peak January inflow 137,900ML/d Peak outflow 80,300ML/d Total January inflow 10 times previous record 180 times average

9 Laanecoorie spillway

10 Laanecoorie spillway after flood

11 Eppalock spillway road after water had receded

12 Ovens Goulburn Broken Murra y Campaspe Loddon Bullarook Irrigation Areas Torrumbarry time to prepare - natural carrier interaction/ operation - many “fronts” at once Loddon Valley major asset damage - historic role/ expectation - unauthorised works - supporting control Rochester Campaspe rapid impact - office inundated - community angst - storage management - warnings

13 Irrigation Areas -What we do in floods “Flood Mode” Intention replicate natural conditions prevent cross catchment flows Actions channel system ‘shut down’ floodways opened subways inspected/ monitored responded to issues &requests Complexities !!!! Simple !!

14 Rochester Hospital Murray Goulburn Factory Echuca Campaspe River Rochester township

15 G-MW Rochester Office – morning Saturday 15 January 2012

16 Regulator washed out from flood water

17 Flooding – Kerang Power Station

18 Kerang township

19 The recovery - Initiatives Issues to address Infrastructure damage Irrigation demand Customer contact Infrastructure status Dewatering Resources

20 Initiatives Integrated “Live” system information Centralised phone management Coordinated residual water management

21 Initiatives – Data integration Various systems – Enormous data Integrated system analysis –Information - Made available / displayed spatially using GIS system – DEKHO Information users –G-MW incident control room & call centre –Regional offices & operational staff –Construction crews –Other control agencies – SES, Council –Customers & Media – Web based information

22 What it looked like Service requests & severity This area still had irrigation demand in place – no floods This area still had irrigation demand in place Highlighted area to do works to allow water deliveries to occur

23 Web based system status

24 Initiatives – Phone management Customer contact – 24/7 Modernisation – Central System Operations Operational staff focused on response Customers service Responsive Consistent access to current data and ICC

25 Initiatives – Residual water Dewatering – 2012 Hotline Coordinated agency approval Mapping Media Timeliness Water quality Capacity

26 Lessons – Incident establishment Initial stages Incident triggers – clear & concise Preparedness – Scenario training ICC – Administration & IT Communication – Situation reports Local knowledge – Control agencies Staff & public safety

27 Lessons -Response Effective incident management = Information The value of integrated accessible info Call centre - 24/7 contact management Established operating procedures Cost – financial accounting ~$5million

28 Lessons - Recovery Communications Removing residual water Review & improve practices / knowledge Be part of community process Events>>>>design = unanticipated outcomes Recognise staff Communications

29 Questions? Phil Hoare

30 Overview Major areas of concern were quickly evident Lake Eppalock % from rainfall in December/January Cairn Curran 93% - air space only approx 10,000ML No ability to create air space in Lake Eppalock as fill and spill reservoir and irrigation outlet limited to 1,000ML/d Pre-release in Cairn Curran commenced on Wednesday 12 January Orders in operational areas reduced to nil Waranga Channel cuts across flood plain – expected issues Channel system was placed in “Flood Mode”

31 Loddon system Cairn Curran Reservoir – 147,130ML Gated spillway Peak January inflow 90,100ML/d Peak outflow 80,000ML/d Peak Tullaroop discharge 32,620ML/d Peak Laanecoorie discharge 195,000 ML/d Total January inflow 6 times previous record 100 times average

32 Loddon and Campaspe Flood Response & Recovery- Presentation G-MW - Who we are The story/event Response & recovery –Storages –Irrigation areas Impacts Lessons Questions

33 Dam operations

34 Response & recovery storages Essentially Identify triggers for incident management Establish team Monitor and route flows Monitor dam safety Ensure public safety Provide data to relevant agencies Repair damage Community info – clarify assumptions/angst Review operations & consider improvements Response Recovery

35 Gravity irrigation system v’s natural flow Natural land gradient south to north (storages to Murray River) Irrigation network east to west (Eildon to Boort) Gravity system - Design follows contours channel banks – above natural surface reducing capacity Infrastructure provisions at conflict points design criteria What happens when event > design

36 Integrated live system information Infrastructure status online Location and status of support requests Channel status Inspected Y/N Operational Y/N Monitor progress

37 Inspection status

38 Monitoring recovery

39 Flood Damage - Channel bank

40 Ovens Goulburn Broken Murray Loddon Bullarook Campaspe Regulated river systems 14,000 customers in 6 irrigation areas (channel network & pumped supply) Channel network Perth Sydney

41 Complexities Irrigation continues Natural carriers part of system Interference Limited access - intelligence and response Asset failures – physical & design Domestic and stock & dewatering Data collection, prioritisation & sharing across agencies, staff, customers Communications & power out. Not so Simple !!


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