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Coleambally Irrigation Co-Op Ltd Overview of Irrigation Scheme

Coleambally Irrigation Co-Op Ltd Overview of Irrigation Scheme. CIA Stats. Built 1950s - 1970s 79,000 ha Irrigation 121,000 ha including Additional Block 297,000 ha Outfall District 518km Channels 734km Drains Annual Bulk Entitlement ~ 630,000ML. CICL. Privatised in 2000

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Coleambally Irrigation Co-Op Ltd Overview of Irrigation Scheme

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  1. Coleambally Irrigation Co-Op Ltd Overview of Irrigation Scheme

  2. CIA Stats • Built 1950s - 1970s • 79,000 ha Irrigation • 121,000 ha including Additional Block • 297,000 ha Outfall District • 518km Channels • 734km Drains • Annual Bulk Entitlement ~ 630,000ML

  3. CICL • Privatised in 2000 • Coleambally Irrigation Cooperative Ltd • Dual Cooperative • Irrigator Shareholder Members Driving Philosophy Improve distribution efficiency and deliver more water to farmers

  4. Renewals Profile

  5. Total Channel Control (TCC)

  6. Variable Channel Behaviour And Finding the balance Channel Level Actual Behaviour Losses Target Operation Poor Service

  7. Water Management Software Intelligent Gate Technology • Water Savings • Increased Customer Service • Reduced Operating Costs Total Channel Control Software Integrated Approach

  8. FlumeGate™ • Ready to connect to SCADA network • Flow measurement • Flow Control • Sized from outlets to large gates • Positive drive in both directions • U/S and D/S Water levels • Redundant Instrumentation • Simple to install • Water tight seals • Low maintenance

  9. Dethridge Wheel Flume Gates

  10. COLY 9 Losses – Comparison reflecting adoption of TCC Innovation – Doing what CIA infrastructure was NOT designed to do.

  11. Channel Seepage Detection

  12. Electrical Conductivity Imaging under Coleambally Irrigation Canals A feasibility study for canal seepage and shallow groundwater investigation By: David Allen David.A1@bigpond.com 02 6332 3895 70 Morrisset St Bathurst NSW 2795 For: Coleambally Irrigation Limited Allen Hydro- Geophysics March 2005

  13. A prototype submersible 20m geo-electric array, pressure sensor (for measuring canal depth) and 4wd mounted elevatable boom that withstood approximately 100km of surveying prior to maintenance.

  14. EC Imaging under Canals and Rivers Sturt Canal Low EC Sand/Gravel? Permeable? Fresh? Gogeldrie Weir High EC Clayey? Impermeable? Saline? Depth 1m 2m 4m 6m 8m 10m Canal Bed 20m 50m Murrumbidgee River The Main canal has been deflected here in order to cross a prominent high permeability prior stream. Shallow groundwater pumping from this prior stream in times of high water demand is highly recommended. Coleambally Main Canal Boundary of low EC prior river channel zone

  15. EM31 Survey of the Irrigation Area

  16. EM31 – Prior Stream

  17. Other Measures introduced prior to 2005-2006 Season

  18. Better Metering at Main Offtake • 4 path Accusonic meter installed in 2002 • 2 Radar Depth Gauges in 2006 • Replaced Depth Gauge and Rating Table • Tombullen Offtake metered by AFFRA unit in 2005 (State Water)

  19. Minimum Dethridge Wheel Flow Rates • Minimum flow set to 4ML/day • Below this Dethridge Wheels are very inaccurate • Big impact in the CIA in low allocation years – small rice crops mean wheels left going at only 1-2 ML/day • Some resistance from farmers

  20. All Extractions Metered • 2ML Stock & Garden per Farm • Previously accessed by unmetered siphons • Ø50mm siphon 10m long – 40ML/season • All S&G sites registered • Installing meters at farm’s expense • Moving access point behind metered outlet • Improved General Awareness

  21. Heavier Fines • Unauthorised Extractions • Meter Tampering • Water debited 5 times estimated theft • $$$ Large penalties on Water Bill

  22. Education • Stealing from Government considered sport • In CIA – Theft is from your Neighbour • 5% Accurate Meter Rebate • (10% 05/06 season) • 05/06 Season – 60,000+ML from Savings • 06/07 Season – 50,000+ML Up Front + 60,000+ML during season

  23. What Does this all Mean?

  24. More water for Farmers

  25. The Future

  26. Replace all Dethridge Wheels • Starting Winter 2008 • ~400 outlets • Flume Ms

  27. Top of System Storage • 5000ML Storage planned for the top of our distribution system • $3-4M Project • Integrated with TCC • Ability to capture Rainfall Rejection Events

  28. Other • In Situ meter testing • Farm integration into automated system • Real time metering in Outfall District • Improved Forecasting • ???

  29. Water Smart Australia Project Project Elements NWC (WSA) CICL/Customers Funding ($000) Funding ($000) 1. Farm Outlet Controllers 4,293 2,866 2. On farm automation 774 774 3. In line storage 1,287 1,287 4. Loss detection 60 0 5. Outfall Drain 1,168 1,290 6. Automatic Weather Station 135 67 7. Soil Moisture Sensors 1,340 1,340 8. Deep leakage monitoring 247 247 9. Application rate optimisation 209 209 10. Data integration and web interface 1,881 209 11. Groundwater usage monitoring 111 111 12. System harmonisation 1,025 200 Sub Total 12,528 8,599

  30. Thank You

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