2021-01-18 GC - Item 3 - Attachment 2 - Phase 7 Project Summary Coastal Hazards Adaptation Plan

 Noosa Shire Council Coastal Hazard Adaptation Plan: Project Summary                                         14
 Methodology




         The QCoast2100 Guidelines require Councils to develop criteria for ranking, or prioritising adaptation
         options. For the Noosa CHAP, a Multi-criteria Analysis (MCA) process was applied to potential
         adaptation mitigation options for locations where risks were assessed as High to Very High in the
         Phase 5 risk assessment. Identified options were chosen from a long list of available coastal hazard
         mitigation options, similar to the Coastal Hazard Adaptation Options: A Compendium for Queensland
         Coastal Councils (Griffith University, 2012), as recommended in the MS & G Guidelines.

         The MCA criteria and their weightings are shown in Table 2-8.

                                       Table 2-8     MCA Assessment Criteria

           Criteria          Criteria Description                                                       Weighting
                             Order of magnitude monetary costs to build/implement an
           Cost              adaptation option (further detailed studies to confirm costs would           20%
                             be required), either by Council or private land owners
                             Whether an adaptation option will have adverse impacts on
           Environmental
                             environmental values e.g. Matters of State Environmental                     20%
           Impact
                             Significance
                             Whether an adaptation option will have adverse impacts on other
           Social Impact     social values or is likely to have community support e.g. access,            15%
                             amenity, property values
           Reversible/       Whether an option is able to be ‘reversed’ or adapted to cater for
                                                                                                          10%
           adaptable         future needs
                             Whether an option is technically feasible (i.e. is effective in
                             mitigating the risk and is implementable)
                             Whether an option is able to be readily approved (i.e. is
           Effectiveness                                                                                  35%
                             consistent with current planning policy or legislative requirements)
                             Whether an option provides a long-term solution to the coastal
                             hazard risk, or is suitable for use as an interim option

         A “traffic light” system was used to group the options for further consideration as follows:

         • “GO”: an option is considered suitable with no other adverse impacts, and requires no further
            development (i.e. studies, design etc). These could also be defined as “No Regrets” options.

         • “SLOW”: an option may be suitable, but should be subject to further detailed assessment at
           specific locations i.e. Cost Benefit Analysis.

         • “STOP”: an option is not considered suitable at a location and may not be considered for further
           detailed analysis.

         The weighting applied was determined by Council officers; no sensitivity analysis was undertaken.

2.2.6    Phase 7: Socioeconomic Appraisal
         A Cost-Benefit Analysis (CBA) was performed by Aither on two regions within the Noosa region; the
         open coast and Noosaville. The aim of this socio-economic analysis was to assist council in
         understanding the merit of different coastal hazard mitigation options, particularly those that have
         significant ongoing implications in terms of economic or community impact (usually those options
         identified as requiring further assessment in the previous Phase (i.e. “slow” options).