AGENDA - Sunshine Coast Council

More documents

Recommendations

Info

Strategy and Planning Committee Agenda 16 February 2011 Adapt to the prospect of climate change Incorporating climate change projections up to 2100 into planning and decision making is seen as a critical action of this Strategy. While agreement has been reached that the development will need to cater for sea level rise due to climate change at 2100, debate continues over the extent of the predicted rise. Through this Strategy the Council endorsed the recommendations of the Intergovernmental Panel on Climate Change which established a predicted sea level rise of 1.1 metres. This level was supported by Sunshine Coast specific projections identified by the University of the Sunshine Coast. The relevant Queensland statutory Planning documents (South-East Queensland Regional Plan and Draft Queensland Coastal Plan) adopt a sea level rise figure of 0.8m by 2100. The sea level rise predictions adopted by the State Government are based on projections by Hunter J. (2008) Ways of Estimating Changes in Sea-Level Extremes Under Conditions of Rising Sea Level, Antarctic Climate & Ecosystems Cooperative Research Centre and upper limits of the range identified in the Intergovernmental Panel for Climate Change (IPCC) (2007) Climate Change 2007: The Physical Science Basis, Contribution of Working Group 1 to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change. The sea level rise value of 1.1m is adopted from the Australian Government Department of Climate Change (2009) Climate change risks to Australia’s Coast, A First Pass National Assessment Department of Climate Change. The sea level rise value of 1.1 metres by 2100 was selected in the Department of Climate Change assessment as it represented a plausible range of sea level rise values from post IPCC research. Table 1 shows the 100 year ARI storm tide level, Highest Astronomical Tide (HAT) and Lowest Astronomical Tide (LAT) both under current climate conditions and with 0.8m and 1.1m sea level rise. Note that only the increase in sea level has been taken into account with the storm tide figure. Storm tide events are predicted to become more frequent and more intense but without any further storm tide studies being undertaken the increase in frequency and intensity of storm tide events is not known. Table 1: Levels at Golden Beach Under Current Climate and Year 2100 (All Values in m AHD) Current Year 2100 0.8m Seal Level 1.1m Sea Level Rise Rise 100 year ARI Storm 1.95 2.75 3.05 Tide at Golden Beach Highest Astronomical 0.85 1.65 1.95 Tide Lowest Astronomical Tide -0.66 0.14 0.44 Table 2 shows the freeboard from the 100 year ARI storm tide level at proposed floor, fill platform and road levels under both current climate conditions and with 0.8m and 1.1m sea level rise. Note that the 100 year ARI storm tide level is higher than the peak 100 year ARI floor level from both regional and local flooding. Table 2 shows that under current climate conditions proposed floor, fill platform and road levels significantly exceed the requirements of Caloundra City Plan and QUDM. Including 0.8m sea level rise the proposed floor, fill platform and road levels have less than the required freeboard. Proposed floor levels and fill levels are still above peak flood levels and would be in accordance with the requirements of Maroochy Plan. Page 44
Strategy and Planning Committee Agenda 16 February 2011 Roads have an inundation depth slightly above that required by QUDM. With a sea level rise of 1.1m only the floor levels remain above the 100 year storm tide level and the freeboard is reduced to 0.15m. The inundation depth over roads meets the requirements for access to rural residential and rural building sites only. Table 2: Freeboard from 100 year ARI Storm Tide Level at Golden Beach to Proposed Floor, Fill and Road Levels (All Values in m AHD) Current Year 2100 0.8m Seal Level 1.1m Sea Level Rise Rise Freeboard to 1.25 0.45 0.15 Proposed Floor Level Freeboard to 0.5 - - proposed Floor Levels required by current Flood Management Code Freeboard to 0.95 0.15 Inundated by 0.15 Proposed Fill Platform Level Freeboard to 0.5 - - proposed Floor Levels required by current Flood Management Code Freeboard to 0.45 Inundated by 0.35 Inundated by 0.65 Proposed Road Level QUDM Table 7.04.1 Inundated by 0.25 In summary all dwellings constructed under the preliminary approval are predicted to be free from inundation during a peak 100 year ARI event including a sea level rise of 1.1m. Freeboard requirements to floor levels and lots will however not be achieved. Objective No. 5 of the (CCPOS) is to Identify and Plan for Climate Change Risks including reducing climate change risks through land use planning. The implementation of using land use planning to limit climate change risks is due for completion in 2013 and is linked to the New Planning Scheme. The application has been recommended for approval and fill levels set which are not in accordance with the CCPOS because the requirements of the CCPOS are not reflected in either the current planning scheme applicable to the development or in any applicable State Government planning instruments. Adapting to the impacts of climate change are features of the Strategy that have been adopted during the assessment of this application. • both development and infrastructure are required to be constructed to cater for climate change; • the impacts of mosquito’s have been addressed and in places setbacks to marine environments increased; • open space areas have been increased in size to ensure they continue to be fit for purpose even if inundation of lower areas occurs; and • buffers to Bells Creek have been increased and rehabilitation and revegetation works required to enhance the riparian corridor along Bells Creek. Page 45
Page 1 and 2: AGENDA STRATEGY AND PLANNING COMMIT
Page 3 and 4: Strategy and Planning Committee Age
Page 45: Strategy and Planning Committee Age
Page 97 and 98:
Strategy and Planning Committee Age
Page 99 and 100:
Page 101 and 102:
Page 103 and 104:
Page 105 and 106:
Page 107 and 108:
Page 109 and 110:
Page 111 and 112:
Page 113 and 114:
Page 115 and 116:
Page 117 and 118:
Page 119 and 120:
Page 121 and 122:
Page 123 and 124:
Page 125 and 126:
Page 127 and 128:
Page 129 and 130:
Page 131 and 132:
Page 133 and 134:
Page 135 and 136:
Page 137 and 138:
Page 139 and 140:
Page 141 and 142:
Page 143 and 144:
Page 145 and 146:
Page 147 and 148:
Page 149 and 150:
Page 151:
show all

AGENDA - Sunshine Coast Council

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?