Thames-Coromandel in Top Ten for Coastal Flood Risk

Last month NIWA published a study of coastal flooding risk.  This has confirmed that Thames-Coromandel District is the 8th most at risk territorial authority in New Zealand, including all major cities.

As your new representative for TCDC on the Waikato Regional Council I will be continuing my sustained campaign as a private citizen for urgent action to map and plan for coastal flooding. Residents are entitled to be properly informed of the risks to their properties and communities and to be involved in how we must adapt.

In 2010 a law was passed which required councils to identify and assess the risk of coastal flooding for the next 100 years.  Nine years later both Waikato Regional Council and TCDC are only just starting this process.  Both councils have failed to treat coastal flooding and the risks of sea level rise with the urgency required.  We are years behind many other councils.

Thames-Coromandel has more buildings at risk from coastal flooding (2020) under present day sea level than Auckland (1790), Wellington (1120) and Tauranga (953). 

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When coastal flooding is mapped for sea level rise Thames-Coromandel remains the 8th most at risk district or CITY at 0.1 m, 0.2 m, and 0.3 m.  Around 0.3 m of sea level rise is unavoidable and is projected to occur by 2040 – 2050.

Thames-Coromandel is the 9th most at risk local authority in terms of population affected under present day sea level, and at 0.3 m of sea level rise has more people affected than Wellington.

Moanataiari sea wall Thames

TCDC has more kilometres of roads (11th in NZ) and pipes (9th in NZ) at risk than Wellington and Tauranga, and two airfields are at risk – the highest number for any Council in New Zealand.



NIWA also studied fluvial (river) flooding and their report confirms that TCDC has 7127 buildings at risk with a replacement value of $1.6 billion (the 13th most at risk territorial authority in New Zealand for fluvial risk)