The timing and severity of sea-level-rise impacts will vary across the district, so we’re doing our adaptation planning in sections.
Help us all get ahead of the impacts of sea-level rise in the Whakaraupō Lyttelton Harbour to Koukourarata Port Levy area.
Visit letstalk.ccc.govt.nz before 10 December 2023 and let us know what you think about the draft adaptation options for your community and the wider area.
We’re starting with communities in the Whakaraupō Lyttelton Harbour to Koukourarata Port Levy area.
We chose these communities because, as well as having places that are going to be impacted by coastal hazards in the short term, the area has a unique combination of factors that make it a great place to pilot our approach.
It’s a mix of an urban and rural environment, with built, cultural, economic, social and ecological interests. It also has infrastructure dependencies, such as the transport network, which has implications for the wider area.
Between 2005 and 2020 we experienced 10 centimetres of sea-level rise, and it's virtually certain it will continue to rise over the 21st century.
In Ōtautahi Christchurch, we anticipate a further rise of 14 to 23 centimetres by 2050, and 38 to 100 centimetres by 2100 (compared to the 2020 sea level). Over the longer term, there's high certainty that the sea level is committed to rising for centuries to millennia to come due to deep-ocean warming and ice-sheet melt, and it will remain elevated for thousands of years.
For more information, see this report from the Intergovernmental Panel for Climate Change(external link).
The Coastal Panel has agreed on the priority adaptation locations (PALs) within the wider Whakaraupō Lyttelton Harbour to Koukourarata Port Levy area. The priority adaptation locations are the areas for which specific adaptation plans will be developed.
While we are planning for communities as a whole, public funding will be focused on public assets that contribute to the health, safety and wellbeing of communities. Therefore, priority adaptation locations were determined based on where coastal hazards are already impacting or would impact within the next 30 years, and where there is a high level of public asset exposure.
The priority adaptation locations are:
A network-wide approach to transport and marine infrastructure.
The Coastal Panel has also taken on board feedback from the wider community and developed community objectives which describe the outcomes that the Panel hopes to achieve through adaptation planning.
Adaptation options and pathways will be scored against these community objectives, as well as a range of other criteria, to assess how acceptable they are.
The wider community will also have further opportunities to provide feedback on adaptation pathways developed by the Coastal Panel later in the process.
The community objectives are:
To read about coastal hazards that may be exacerbated as sea levels rise, watch these videos.
You can explore the possible effects anywhere on our coastline in this interactive coastal hazards portal(external link).
Read our information brochures below to find out more about what the impacts could be for your area:
From October to December 2022, we heard from the wider Whakaraupō Lyttelton Harbour to Koukourarata Port Levy communities about what they value in their coastal environments, what they want the future to look like, and what they didn’t want to see in the future.
This information is being used by the Council and the Coastal Panel to ensure local values inform the development of adaptation plans that allow communities impacted by coastal hazards to respond to changes over time.
In December 2021, as part of a scholarship project between the Council and the University of Canterbury, students undertook a survey to better understand communities’ risk tolerances and the impacts that potential loss of main road access could have on residents and essential services in the area. This information is also being used by the Council and the Coastal Panel while making adaptation plans for the area.
A Coastal Panel has been appointed to lead adaptation planning in the Whakaraupō Lyttelton Harbour to Koukourarata Port Levy area. The Panel is a diverse group of 13 community and rūnanga representatives from the area, along with some city-wide representatives.
The Panel has been tasked with considering a range of views and interests drawn from engagements with the wider community and with mana whenua, rather than advocating for a particular point of view.
The Panel will provide recommended adaptation pathways to the Council for a final decision.
For more information about the Coastal Panel and its role, read the Coastal Panel Terms of Reference [PDF, 811 KB].
The Coastal Panel has the support and assistance of a Specialist and Technical Advisory Group (STAG) – a forum that’s made up of experts in their fields. The STAG members are able to provide information, advice and guidance to support the Coastal Panel's decision-making.