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Evaluating Stormwater Management Devices— the Role of Life Cycle Assessment

Evaluating Stormwater Management Devices— the Role of Life Cycle Assessment. Robbie Andrew 1 and Eva-Terezia Vesely 2 1 NZ Centre for Ecological Economics, Palmerston North 2 Landcare Research, Auckland. Summary. Life cycle assessment (LCA) Rain gardens Site Analysis

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Evaluating Stormwater Management Devices— the Role of Life Cycle Assessment

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  1. Evaluating Stormwater Management Devices—the Role of Life Cycle Assessment Robbie Andrew1 and Eva-Terezia Vesely2 1 NZ Centre for Ecological Economics, Palmerston North 2 Landcare Research, Auckland

  2. Summary • Life cycle assessment (LCA) • Rain gardens • Site • Analysis • Conclusions / Future work

  3. Today’s Purpose Address the following: • General perception is that rain gardens are more env friendly • Is LCA the tool for the job? • Indirect effects and impacts are often ignored

  4. Life Cycle Assessment (1) • “Cradle to Grave” • ISO 14040 series

  5. LCA: Sounds useful… • An objective approach • ISO 14040 • Direct and Indirect impacts • Bottom-up • International data gathering effort

  6. LCA: But… • Assumes linearity • Production of 2kg of product impacts environment twice as much as production of 1kg • System boundary critical • Conclusions can strongly depend on how much you include in the analysis

  7. The 3 Stages of LCA • Goal and Scope Definition • Inventory Analysis • Impact Assessment

  8. An Application • Goal: To compare the life-cycle environmental impact of a rain garden with that of an equivalent conventional stormwater device

  9. Study Site • North Shore City • Design incomplete: difficulties with sloping terrain  Cost

  10. Raingarden: Life Cycle Screenshot from GaBi 4

  11. Raingarden: Production

  12. Raingarden: Use

  13. Raingarden: Disposal

  14. Conclusions / Future Work • This is a Work in Progress • Much of initial work complete • Data collection to continue • Monitoring data to be used • Impact Assessment

  15. Acknowledgements • Surya Pandey and Robyn Simcock of Landcare Research • Barbara Nebel of Forest Research • Foundation for Research, Science, and Technology

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