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Supplementary Access Gwydir Valley 2008

Supplementary Access Gwydir Valley 2008. Craig Cahill. Access To Date. Three separate supplementary events since the embargo was lifted in December 2007. Gwydir river starting 6 th January 2008. Carole creek starting 22 nd January 2008.

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Supplementary Access Gwydir Valley 2008

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  1. Supplementary Access Gwydir Valley 2008 Craig Cahill

  2. Access To Date • Three separate supplementary events since the embargo was lifted in December 2007. • Gwydir river starting 6th January 2008. • Carole creek starting 22nd January 2008. • Complete system starting 5th February 2008 (This includes Gil Gil creek).

  3. Gwydir River January 2008 • Localised rain event U/S of Gravesend. • Available flow to be shared 2607ML. • 8% announcement made from Boolooroo Weir to Caithness on the Lower Gwydir. • 1255ML announced 1021ML pumped.

  4. Carole Creek January 2008 • Localised rain event and inflow from Marshall ponds. • Available flow to be shared 2100ML. • 3% announcement made from Midkin to Cleveland. • 920ML announced 918ML pumped.

  5. Complete System Announcement • General falls across whole valley with isolated heavy rainfall. • Total Flow Volume

  6. Complete System Announcement • Available flow to be shared

  7. Complete System Announcement’s

  8. Complete System Announcement’s

  9. Determining Section Announcements • Forecast volume of event and shape of hydrograph. • Assess if there is surplus to requirements. • Determine what section is next on the three year rolling average, while considering deliverability, event volume, shape of hydrograph and past announcements.

  10. Principals of Three year Rolling Average • Announcements are made based on opportunity to access supplementary flows. • To share opportunity across all section as equitable as possible, based only on when flows are available.

  11. Summary of Announcements made from 30th June 2005 to 5th Feb 2008

  12. Summary of Announcements made from 30th June 2005 to 17th March 2008

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