Erosion, landslips and sea water flooding are the dominant natural coastal hazards along the District's coastline.
Coastal erosion is either a long-term trend or a significant short-term shoreline fluctuation, especially on sand dune-backed coasts. Landslip is directly associated with coastal erosion where the geology is relatively weak and prone to slope failure.
Severe coastal storms or tsunami produce waves which can temporarily flood low-lying coastal areas. The effects of climate change are likely to increase hazards in the coastal zone.
Coastal hazards reports
Coastal Management Strategy
Review of Coastal Hazard Zones for Eleven Selected Beaches(PDF, 2MB)
Coastal Hazard Risk Zone Assessment for Pataua and Matapouri Bay(PDF, 4MB)
Coastal Erosion Hazards Review - One Tree Point to Waipu Cove(PDF, 597KB)
Projected Sea Level Rise - Ruakaka and Marsden Point(PDF, 2MB)
Coastal Hazard Zone Assessment for One Tree Point and Marsden(PDF, 1MB)
Coastal flooding and coastal erosion
The Northland Regional Council manage the coastal hazard maps for coastal flooding and coastal erosion. You can view information about coastal hazards on their website.
Coastal hazards (nrc.govt.nz)
In April 2021, the Northland Regional Council released a bew update to the coastal flooding and coastal erosion maps.
There is a three-month feedback period before the maps are finalised in mid-July, and people should get in touch with the Northland Regional Council directly to discuss any technical aspects of the maps.
Update to coastal hazard maps (nrc.govt.nz)