Natural Hazards

New Zealand is subject to a range of natural hazards. These include natural events such as earthquakes, river flooding, coastal erosion and coastal inundation. These  events create natural hazards when they affect people, property and the environment.

One of Nelson City Council’s responsibilities is to manage risk from natural hazards. Council is required by law not only to investigate natural hazards, but to make the relevant research available to anyone who is affected or interested.

Council fulfils this function in various ways, including:

View the Hazards Map

  • the Nelson Resource Management Plan
  • building consents
  • placing statements on property files noting that a property is potentially affected by a natural hazard (LIM and PIM)
  • managing infrastructure assets
  • civil defence responsibilities

Council has undertaken various technical studies to better understand where particular natural hazards may occur. This includes research and modelling for potential fault hazard, liquefaction hazard and flood hazard. Further information on each of these hazards is provided below.

Council is in the process of undertaking technical studies in relation to coastal erosion, coastal inundation and slope stability. More information will become available on this page as this work is completed.

Information regarding tsunami, including Tsunami Evacuation Maps and frequently asked questions, is held on the Nelson Tasman Civil Defence Emergency Management (CDEM) website.

Council’s natural hazards work will be used to inform the development of the Nelson Plan (resource management) which is currently being prepared and will replace the Nelson Regional Policy Statement, the Nelson Resource Management Plan, and the Nelson Air Quality Plan.

Civil Defence

For information on civil defence and emergency management in the Nelson Tasman region please visit the Civil Defence website.

Flooding, Fault and Liquefaction Hazards: Community Feedback

Between April and June 2017, Council gathered community feedback regarding Nelson’s flood, fault and liquefaction hazards, and how we should be responding to these in the review of our resource management plan, the Nelson Plan. Natural hazards are an issue New Zealand is coming to terms with and the information the community gave us was of much value.

The feedback gathered from this community engagement has been summarised into a report:

Next Steps

Following this community engagement, Council has been refining the technical information with a view to mappingthis in the Nelson Plan and developing associated planning rules.

Further technical assessment has enabled us to reduce the area of risk from liquefaction hazard in Tahunanui.

Work on our flooding information is ongoing and we will be in touch with affected landowners in early 2018 once the refined modelling is complete.

We will update the extent of the fault hazard corridor in mid-2018 using geotech information recently received as part of resource or building consent applications.

It is anticipated that Council will release a draft Nelson Plan in August 2018. This will be the community’s opportunity to provide feedback on the draft natural hazards provisions, prior to notification of a Proposed Nelson Plan in 2019.