Presentation regarding options to reduce water consumption in South East Queensland. Presented at the AWA Qld Regional Conference in Nov 2007.

1. How much further can demand management strategies go to ensure future water security for SEQ? Tanzi Smith, Darren Edward*, Alex Kazaglis and Andrea Turner *independent contributor THINK. CHANGE. DO INSTITUTE FOR SUSTAINABLE FUTURES

3. A snapshot SEQ’s current and future water needs 440 GL/a 630 GL/a 450 GL/a used by SEQ prior to drought 2004 2007 2050 Source: Queensland Government 2007 (based on high saving scenario, medium population growth) GAP = 540 GL/a 440 GL/a Yield derated by 30% Population: 2.8 million Demand in 2050: 980 GL/a (including 30GL for climate change, 20GL for rural irrigation) Population: 5.1 million

4. Queensland Government’s proposed strategy A diverse portfolio with controversial elements ~186 GL/a ~24 GL/a Existing Government savings program (industrial recycling, efficiencies etc) Western corridor recycling Additional minor surface and groundwater sources Expanded Tugun Desalination plant 84 GL/a 62 GL/a 50 GL/a GAP = 134 GL/a Leakage reduction The WATER GRID + Additional demand of 540GL/a Traveston Crossing 150 GL/a Wyaralong Dam 18GL/a Qld Govt plans two new dams to fill this gap:

10. Alternatives to new dams: Which is the better option to meet the 134GL/a gap? But the Qld Government’s remains reluctant to expand DM Further Urban sector DM Dry Cooling DM Option: New Water: 230 GL/a Unit Cost : $1.08-1.15/kL Social and Environmental Impact : Low/positive Traveston Crossing & Wyaralong Dams Two new Dams Option: New Water: 168 GL/a Unit Cost : $3.4-4.65/kL Social and Environmental Impact : High