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Mapping Our Natural Hazards

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

Community feedback was sought on these three hazards in April-June 2017. Since then, Council has been refining the technical information with a view to map this in the Nelson Plan and have associated planning rules.

We will continue to seek feedback on our revised resource management plan - the Draft Whakamahere Nelson Plan in 2021. This is the community’s opportunity to provide feedback on the draft natural hazards provisions, prior to notification of a Proposed Whakamahere Nelson Plan.

Further technical assessment has enabled us to reduce the area of risk from liquefaction hazard in Tahunanui and this revised boundary is now mapped.

Work on our flooding information is ongoing and we will make this available in 2021 once the refined modelling is complete. These are largely minor amendments in some localised areas. In the meantime, the mapped flood models remain the most up to date information that Council holds on flood risk in Nelson.

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 2100. A 1% AEP event is a flood that has a 1% chance of occurring or being exceeded every year, and is sometimes known as the 1 in 100 year flood.

You can also view the flood water depths for the year 2100. 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.