Climate Risk and Adaptation Assessment
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Appendix Climate Risk L1 and Adaptation Assessment QPRC Sewage Treatment Plant Climate Risk and Adaptation Assessment Queanbeyan-Palerang Regional Council Project number: 60436407 3 August 2020 QPRC Sewage Treatment Plant Project number: 60436407 Quality information Prepared by Checked by Verified by Approved by Paul Himberger Adam Davis Adam Davis Adam Davis Environmental Planner Technical Director – Technical Director – Technical Director – Sustainability & Resilience Sustainability & Resilience Sustainability & Resilience Revision History Revision Revision date Details Authorized Name Position 1 10 September 2019 Draft for Client Paul Himberger Environmental Planner 2 27 September 2019 Final for Client Paul Himberger Environmental Planner 3 3 August 2020 Revised Final for Paul Himberger Senior Client Environmental Planner Prepared for: Queanbeyan-Palerang Regional Council Prepared by: AECOM Australia Pty Ltd 17 Warabrook Boulevard Warabrook NSW 2304 PO Box 73 Hunter Regional MC, NSW 2310 T: +61 2 4911 4900 F: +61 2 4911 4999 aecom.com ABN 20 093 846 925 AECOM in Australia and New Zealand is certified to ISO9001, ISO14001, AS/NZS4801 and OHSAS18001. © 2019 AECOM Australia Pty Ltd. All Rights Reserved. AECOM has prepared this document for the sole use of the Client and for a specific purpose, each as expressly stated in the document. No other party should rely on this document without the prior written consent of AECOM. AECOM undertakes no duty, nor accepts any responsibility, to any third party who may rely upon or use this document. This document has been prepared based on the Client’s description of its requirements and AECOM’s experience, having regard to assumptions that AECOM can reasonably be expected to make in accordance with sound professional principles. AECOM may also have relied upon information provided by the Client and other third parties to prepare this document, some of which may not have been verified. Subject to the above conditions, this document may be transmitted, reproduced or disseminated only in its entirety. However, caution must be taken when considering our conclusions because significant uncertainty remains due to the inherent complexities involved in analysing the past climate and variables typically encountered when modelling future climate change. AECOM cannot guarantee the accuracy of the climate observations and projections described in this report and cannot be responsible for any third party’s reliance upon on this information. Prepared for: Queanbeyan-Palerang Regional Council AECOM QPRC Sewage Treatment Plant Project number: 60436407 Table of Contents List of Acronyms ............................................................................................................................................... 4 Executive Summary .......................................................................................................................................... 5 1. Introduction ......................................................................................................................................... 7 2. Climate Change Requirements ............................................................................................................ 8 3. Methodology ..................................................................................................................................... 10 4. Climate Change Context.................................................................................................................... 12 5. Climate change risk assessment........................................................................................................ 20 6. Climate adaptation ............................................................................................................................ 23 7. Residual Risk Assessment ................................................................................................................ 27 8. ISCA Cli-1 and Cli-2 Requirements .................................................................................................... 34 9. Conclusion ........................................................................................................................................ 35 10. Next Steps ........................................................................................................................................ 36 References ..................................................................................................................................................... 37 Appendix A Detailed Climate Change Projections............................................................................................. 38 Appendix B QPRC Risk Management Framework ............................................................................................ 39 Appendix C Workshop Materials, Sign In Sheet and Presentation ..................................................................... 40 Figures Figure 1 - Climate Change Risk Assessment Process (adapted from DEH, 2006) ............................................. 10 Figure 2 - Queanbeyan 2010 flooding event. Source: QPRC ............................................................................ 12 Figure 3 - Carwoola 2017 bushfire event. Source: ABC .................................................................................... 12 Figure 4 - One in 100-year flood planning area. Source: ACTmapi viewer. Site and surrounds in purple. ............ 13 Figure 5 – Erosion risk. Source: ACTmapi viewer. Site and surrounds in purple. ............................................... 13 Figure 6 - Bushfire prone land. Source: ACTmapi viewer. Site and surrounds in purple...................................... 14 Figure 7 - December 2017 Rainfall event. Source: Bureau of Meteorology ........................................................ 14 Figure 8 - Future changes in days per year above 30°C. Source: AdaptNSW. ................................................... 19 Tables Table 1 - Risk Register Summary ...................................................................................................................... 5 Table 2 - IS Rating Tool v.1.2 Cli-1: Climate change risk assessment criteria ....................................................... 8 Table 3 - IS Rating Tool v.1.2 Cli-1: Climate change risk assessment criteria ....................................................... 9 Table 2 - Workshop Participants ...................................................................................................................... 11 Table 3 - Primary and secondary effects relevant to the STP ............................................................................ 16 Table 4 - Climate projections ........................................................................................................................... 17 Table 5 - Risk Register Summary .................................................................................................................... 20 Table 6 - Climate risk statements ..................................................................................................................... 21 Table 7 - Current / potential climate adaptation measures ................................................................................. 24 Table 8 - Residual Risk Assessment ................................................................................................................ 28 Prepared for: Queanbeyan-Palerang Regional Council AECOM QPRC Sewage Treatment Plant List of Acronyms Acronym Definition AS Australian Standard BoM Bureau of Meteorology CRAA Climate Risk and Adaptation Assessment CSIRO Commonwealth Scientific and Industrial Research Organisation DPIE Department of Planning, Industry and Environment ISCA Infrastructure Sustainability Council of Australia ISO International Standards Organisation LGA Local Government Area NZS New Zealand Standard OEH Office of Environment and Heritage QPRC Queanbeyan-Palerang Regional Council STP Sewage Treatment Plant Prepared for: Queanbeyan-Palerang Regional Council 4 QPRC Sewage Treatment Plant Executive Summary The Queanbeyan Sewage Treatment Plant (STP) has been operating since the mid-1930s, treating Queanbeyan’s wastewater before discharge into the Molonglo River. The condition of the site’s assets has been deteriorating for a number of years now, and the plant is running critically close to its design capacity due to increased population and subsequent demand. Queanbeyan-Palerang Regional Council (QPRC) has decided to upgrade the Queanbeyan Sewage Treatment Plant with an aim to provide ‘a level of service that conforms to industry best practice for the protection of public health and the environment.’ This report provides a Climate Risk and Adaptation Assessment (CRAA) for the Queanbeyan-Palerang Regional Council Sewage Treatment Plant. The assessment has been completed in line with the requirements outlined in the Infrastructure Sustainability Council of Australia (ISCA) Rating Scheme version 1.2 (v.1.2) relating to Cli-1: Climate Change Risk Assessment and Cli-2: Adaptation Measures. The report identifies climate effects relevant to the project and provides an assessment of the potential climate risks to the proposed works. It further identifies appropriate risk management and adaptation measures to be incorporated into the construction and operation phases to build the resilience of the proposed works to changing climate conditions. Climate science