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Mapping Our Natural Hazards

You can search on our natural hazards map for a closer view of the following:

Community input into Hazard Mapping

As updated hazard mapping becomes available, the Council continues to seek feedback.  This feedback informs our  resource management plan - the Draft Whakamahere Nelson Plan.

Previous engagement was carried out on release of the river flooding, liquefaction and fault mapping in 2017.  Further feedback on liquefaction and fault provisions was also obtained in 2020 as part of the Draft Nelson Plan engagement. 

The Council has now updated the river flood modelling and mapping and is seeking further feedback. Visit shape.nelson.govt.nz/nelson-plan for more information and to provide your feedback.

What do the river flood maps show?

We have mapped the extent of two flood scenarios – a 1% AEP (annual exceedance probability) rainfall event for both the present day and the year 2130. A 1% AEP event is a flood that has a 1% chance of occurring or being exceeded every year,

You can also view the flood water depths for the year 2130. Click on the Legend and select this as a ‘sublayer’ under the Hazards tab. A key showing flood water depth can be viewed by selecting the smaller ‘legend’ tab. Please note that this layer is slow to draw.

Click on the magnifying glass to search for an address, e.g. "110 Trafalgar" to locate a property. If the search cannot find your property, try searching for a road name, e.g. “Todd Bush” to zoom to the general area.

Coastal Inundation

Coastal inundation (where sea water floods the land during storm tides or indirectly via the stormwater network and/or elevated groundwater levels) please visit the Coastal Inundation Map.   shape.nelson.govt.nz/coastal-hazards