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.
Landslips are directly associated with coastal erosion where the geology is relatively weak and prone to slope failure.
Severe coastal storms or tsunamis 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.
In April 2021, the Northland Regional Council released a new update to the coastal flooding and coastal erosion maps.
Update to coastal hazard maps (nrc.govt.nz)