Coastal Hazards - Erosion
Buddina Beeach June '19
The State Interest in natural hazards, risk and resilience identifies that the risks associated with natural hazards, including the projected impacts of climate change, are avoided or mitigated to protect people and property and enhance the community’s resilience to natural hazards.
State declared erosion prone area
All development along Pacific Blvd at Buddina MUST consider the State Interest in risks associated with natural hazards, including the projected impacts of climate change. The State declared erosion prone area at Buddina is 175m from the highest astronomical tide (HAT), mapped in accordance with the Coastal Protection and Management Act 1994.
In July 2015, the State declared and defined erosion prone areas which were deemed to exist on over all tidal water to the extent of Queensland Coastal Waters and on all land adjacent to tidal water. Erosion prone areas include areas subject to inundation by the highest astronomical tides (HAT) by the year 2100 or at risk from sea erosion.
Reference to the State Development Assessment Mapping System indicates the declared erosion prone area along Buddina beach extends inland and identifies the close proximity to both the medium and high storm inundation areas.
The Sunshine Coast Planning Scheme, Kawana Waters coastal protection overlay map indicates the coastal protection area – this replicates the State mapping of the declared erosion prone area.
Based on Smartline geomorphology data, Pacific Blvd is adjacent to beachfront identified as dominantly sandy shores and very high erodibility with the exception of the far northern section at Pt Cartwright which is identified as dominantly hard rock shores and low erodibility.
Sunshine Coast Planning Scheme
Council’s Coastal protection overlay code is informed by a superseded version of the State Planning Policy however, it does reference the requirement for development to “take appropriate account of the predicted effects of climate change, including sea level rise” and also requires that development within an erosion prone area avoids:
Intensification of existing uses;
New permanent built structures; and
Seaward extensions to existing built structures
State Planning Policy (SPP) 2017
The State Interest in natural hazards, risk and resilience includes the projected impacts of climate change. The SPP Assessment Benchmark 3 applies to a development application for a material change of use in an erosion prone area located outside a coastal management district - this applies to all the Buddina erosion prone area.
The assessment benchmark requires that:
Development …..avoids the natural hazard areas, or where it is not possible to avoid the natural hazard area, development mitigates the risk to people and property to an acceptable or tolerable level.
In accordance with the Planning Act 2016 (Qld), the SPP overrides the SCPS to the extent of any inconsistency.
Coastal hazard history of Buddina
Development sites on Pacific Boulevard at Buddina are located on land recommended for resumption by the Beach Protection Authority (BPA) following cyclonic activity in 1972. During these cyclonic events, the dunes were breached at several locations along Buddina beach.
The BPA engineer’s report found that although the dunes had been lowered in areas as part of the new subdivision of Buddina, the greatest risk was due to the proximity of development to the primary dune. Council deliberated the recommended resumption of this land, however, it ultimately considered the exercise too costly. In addition, Council did not have the support of the residents.
However, this recommendation did influence the second stage of the Kawana Estate plan and subdivisions where development had not commenced. The developments at Warana, Bokarina and Wurtulla were moved further back off the dune in exchange for the developer receiving state land at Battery Hill.