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Flood Hazard Information

Flood Hazard Information

Information about flood hazards and risks underpins good decision making.  By developing robust hazard and risk information and identifying flood risk areas it is hoped that this will provide a sound basis for risk management across the region. 

Flood hazard infomation can be useful to an array of end users and is supplied in a report format.  Waikato Regional Council does hold extensive flood hazard information though it should be emphacised that this information is not complete for the entire region. 

Who uses this flood information?

Flood information requests received by Waikato Regional Council will often relate to a specific property or parcel of land.  These requests are received from a number of end users who may want to know if a particular property has flooded in the past or is likely to be flooded in the future.  Examples of people who have requested flood hazard information in the past are:  

  • local authority planning officers to assist with building and resource consents
  • property owners or people wishing to purchase property
  • insurance companies
  • valuers
  • realestate agents.

Summary of flood hazard information report

You may wish to approach Waikato Regional Council to request a flood hazard report for a particular property or site.   

Waikato Regional Council holds some flood hazard information although this is not complete for the entire region.  Therefore a lack of information does not necessarily mean that a property will not be affected by flooding.  Depending upon the availability of information the report will make reference to the following types of information:

  • Background information and context information (disclaimers, vertical datum, annual exceedance probablilities).
  • Waterways adjacent to/running through the site.
  • Historical inundation information.  This is includes photography/aerial photography/surveyed flood extent captured during or immediately after a flood event (1958, 1998, 2004).
  • Broadscale flood information maps (1:50 000) will provide an overview of the flood hazards associated with many water bodies and may be useful for identifying potential flooding issues that require further discussion and investigation.
  • Detailed inundation information.  Waikato Regional Council holds a range of detailed information that may assist with determining the extent to which a property may be affected by inundation.  This includes detailed inundation and hazard mapping; design flood level information (e.g. the 1 % AEP flood level) and design information for a range of river and drainage assets (e.g. stopbanks, pump stations, flood gates and drains).
  • River bank erosion hazards.  The report will indicate if the property is located in close proximity to a waterway which will be affected by riverbank erosion. 
  • Coastal erosion and flooding hazards.  The report will indicate if the property is located in the coastal environment and subject to one or more of the hazards that occur in this area (e.g. extreme tides, storm surges and coastal erosion).
  • Design flood level determination. Waikato Regional Council or the Territorial Authority may request that a design flood level be incorporated into the design of any proposal.
  • Topographic (LiDAR) data.  Waikato Regional Council holds some topographic information for the region that was captured using the LiDAR surveying technique.
  • Other important information.  The report will reference the importance of the Flood Risk Management Strategy; EW River and Catchment Management; land use management and flood risk; the impact of inundation; residual flood risk and the impacts of climate change. 

How do I request flood hazard information?

 You can contact the flood hazard information team on 0800 800 401 or 07 859 0999 or message us to lodge your enquiry, noting that we may  be able to provide a faster response if you provide your phone number in your message.  Flood hazard information reports will normally take between 1-5 working days to process depending upon the complexity of the request.  Once the enquiry has been processed you will receive a PDF of the report via email from the Regional Hazards Office.

You will need to provide us with the following information so that we can process your enquiry efficiently:

  • Your name, contact number and email address.
  • Address relating to the flood hazard request location.
  • LOT number for the property.
  • A plan/map showing the location of the property.
  • Any other information which is relevant to the site.

For urgent requests please contact our 24-7 Freephone on 0800 800 401