Flood Risk Areas are shown on the planning maps but also apply to any other land that is subject to more than minor flood hazards. Waikato Regional Council information.

The Waikato District Council District Plan is has been produced under the Resource Management Act 1991, and has been distributed to allow better public access to the data underlying the Plan. While you are free to crop, export and repurpose the data, we ask that you attribute the Waikato District Council, link to this page, and clearly state that your work is a derivative and not the authoritative data source. Please include this statement when distributing any work derived from this data:

This work is a derivative of Policy Series, part of the Waikato District Council District Plan. You can find the full District Plan at Waikato District E-Plan (https://www.waikatodistrict.govt.nz/your-council/plans-policies-and-bylaws/plans/district-plan)

Waikato District Council - Proposed District Plan (Stage 2 Natural Hazards), Notified 27 July 2020. This layer is a spatial representation of an overlay in the Proposed District Plan and indicates where land use will be regulated by various associated rules. It will be used as a guide in the regulatory process of implementing the Proposed District Plan and managing land use, subdivision, the environment and economy. This dataset is subject to changes undertaken through the Resource Management act. Note individual Proposed Plan rules can have different statuses, some may have current legal effect and others will not until the Proposed Plan becomes operative. This data is provided for use in the District Plan only.

High Flood Risk Areas are identified as areas within the Flood Plain Management Area where the depth of flood water in a 1% Annual Exceedance Probability (AEP) flood event exceeds 1 metre and the speed of flood water exceeds 2 metres per second. This belongs to the series of data relating to Natural Hazards which includes the following groups - coastal erosion, coastal inundation, inland flooding, and land subsidence. This layer belongs to the inland flooding group. Use in conjunction with Flood Plain Management Area, Flood Ponding Area,and Defended Area.

Waikato District Council - Proposed District Plan (Stage 2 Natural Hazards), Notified 27 July 2020. This layer is a spatial representation of an overlay in the Proposed District Plan and indicates where land use will be regulated by various associated rules. It will be used as a guide in the regulatory process of implementing the Proposed District Plan and managing land use, subdivision, the environment and economy. This dataset is subject to changes undertaken through the Resource Management act.Note individual Proposed Plan rules can have different statuses, some may have current legal effect and others will not until the Proposed Plan becomes operative. This data is provided for use in the District Plan only.

Flood Ponding Areas are areas of land that experience floodwater ponding in a 1% Annual Exceedance Probability (AEP) rainfall event. Only two Flood Ponding Areas have been specifically identified on the planning maps. One of the areas is located in the southern part of Huntly adjacent to the eastern bank of the Waikato River and the other is in Huntly West adjacent to Lake Waahi and Lake Puketirini. This belongs to the series of data relating to Natural Hazards which includes the following groups - coastal erosion, coastal inundation, inland flooding, and land subsidence. This layer belongs to the inland flooding group. Use in conjunction with High Risk Flood Area, Flood Plain Management Area,and Defended Area.

Purpose: This data has been published to support the Waikato Regional Hazards Portal. This data is part of the River Flooding theme. The data is a compilation of flood hazard information which is sourced from a combination of; previous event information (photos and aerial imagery, anecdotal information, post-event surveys), flood modelling, flood protection and drainage scheme information, and elevation data. Data is presented as polygons which represent susceptibility to flooding, with attribute information indicating type of flooding, historical floods, data reference and quality, etc. The data attribute also includes "FLOOD_HAZARD_ID", which is an ID number that corresponds to text files with additional information, available internally in Discover folder # 30 07 10. This data should be viewed in conjunction with flood protection and land drainage asset data (datasets with the prefix RACS, many of these layers are publically available from the CoLAB- Waikato Data Portal). This is for general public information on susceptibility to flooding in the Waikato Region, and should be used to indicate where further investigation may be required. It is important to note that this information is not suitable to use for building or resource consent applications as it is not suitable to be viewed at a property scale.Intended Use Scale: Data should not be used at scales greater than 1:50,000.Data Use Limits: Any flood events which have occurred since the last date of verification (2019) will not be recorded in this data.Data Specific Disclaimers: "The presence of a hazard zone on this map does not guarantee the existence of such a hazard, nor does the lack of information preclude the existence of a hazard or risk. Waikato Regional Council, while providing the information in good faith, accepts no responsibility for any loss, damage, injury, or loss in value of any person, property, service or otherwise resulting from hazards or knowledge of hazards in the Waikato Region.” “The information portrayed on this map is to be used for emergency management and/or evacuation purposes only and is not to be used for land use planning.” “The information contained in this data set and/or map is correct at the date of verification only. Date of verification is 1 June 2006.” “The data provided shall not to be viewed, used or reproduced at a scale closer than 1:50,000 and is not to be viewed, used or reproduced with other datasets of differing accuracy (e.g. cadastral information). This condition recognises the accuracy of the dataset and the consequential lack of applicability to property specific decision making”. The standard Waikato Regional Council Disclaimer applies to this data “While Waikato Regional Council has exercised all reasonable skill and care in controlling the contents of this information, Waikato Regional Council accepts no liability in contract, tort or otherwise howsoever, for any loss, damage, injury or expense (whether direct, indirect or consequential) arising out of the provision of this information or its use by you.”WRC Metadata: For full metadata see HAZARD.sdeadmin.HAZ_REGIONAL_FLOOD_HAZARD - HAZARDS - Regional Hazards Portal - GIS Layers Terms of Use: This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.Should users wish to distribute or publish derivatives or modified versions of this data then they must seek a data use agreement through WRC first.See the Waikato Regional Hazards Portal Terms of use here Waikato Regional Hazards Portal - Terms of use | Waikato Regional Council.

Waikato District Council - Proposed District Plan (Stage 2 Natural Hazards), Notified 27 July 2020. This layer is a spatial representation of an overlay in the Proposed District Plan and indicates where land use will be regulated by various associated rules. It will be used as a guide in the regulatory process of implementing the Proposed District Plan and managing land use, subdivision, the environment and economy. This dataset is subject to changes undertaken through the Resource Management act.Note individual Proposed Plan rules can have different statuses, some may have current legal effect and others will not until the Proposed Plan becomes operative. This data is provided for use in the District Plan only.

The Flood Plain Management Area is the floodplain in a 1% Annual Exceedance Probability (AEP) flood event. This belongs to the series of data relating to Natural Hazards which includes the following groups - coastal erosion, coastal inundation, inland flooding, and land subsidence. This layer belongs to the inland flooding group. Use in conjunction with High Risk Flood Area, Flood Ponding Area,and Defended Area.

Waikato District Council - Proposed District Plan (Stage 2 Natural Hazards), Notified 27 July 2020. This layer is a spatial representation of an overlay in the Proposed District Plan and indicates where land use will be regulated by various associated rules. It will be used as a guide in the regulatory process of implementing the Proposed District Plan and managing land use, subdivision, the environment and economy. This dataset is subject to changes undertaken through the Resource Management act. Note individual Proposed Plan rules can have different statuses, some may have current legal effect and others will not until the Proposed Plan becomes operative. This data is provided for use in the District Plan only. Flood Ponding Areas are areas of land that experience floodwater ponding in a 1% Annual Exceedance Probability (AEP) rainfall event. Only two Flood Ponding Areas have been specifically identified on the planning maps. One of the areas is located in the southern part of Huntly adjacent to the eastern bank of the Waikato River and the other is in Huntly West adjacent to Lake Waahi and Lake Puketirini. This belongs to the series of data relating to Natural Hazards which includes the following groups - coastal erosion, coastal inundation, inland flooding, and land subsidence. This layer belongs to the inland flooding group. Use in conjunction with High Risk Flood Area, Flood Plain Management Area, and Defended Area.

This line shows the limit of flooding from the Whangamarino Wetland and Lake Waikare in Te Kauwhata. This is a site specific layer derived from the Te Kauwhata storm water catchment management plan prepared be Beca Infrastructure Ltd (July 2009). This is a dataset derived from hydrological model. The inputs variables and assumptions for the model are not know. These data are not scheduled for review.

The Waikato District Council District Plan is has been produced under the Resource Management Act 1991, and has been distributed to allow better public access to the data underlying the Plan. While you are free to crop, export and repurpose the data, we ask that you attribute the Waikato District Council, link to this page, and clearly state that your work is a derivative and not the authoritative data source. Please include this statement when distributing any work derived from this data:

This work is a derivative of Policy Series, part of the Waikato District Council District Plan. You can find the full District Plan at Waikato District E-Plan (https://www.waikatodistrict.govt.nz/your-council/plans-policies-and-bylaws/plans/district-plan)

This layer contains the index tiles for LiDAR data for the Nelson - Tasman region, captured between 23 August 2022 and 6 September 2022.

• The DEM is available as layer Nelson and Tasman - Top of the South Flood LiDAR 1m DEM (2022).

• The DSM is available as layer Nelson and Tasman - Top of the South Flood LiDAR 1m DSM (2022.

• The LAS point cloud and vendor project reports are available from OpenTopography.

LiDAR was captured for Nelson City Council, Tasman District Council, Waka Kotahi NZ Transport Agency and the National Emergency Management Agency by Aerial Surveys Ltd between 23 August 2022 and 6 September 2022. These datasets were generated by Arial Surveys Ltd and their subcontractors. Data management and distribution is by Toitū Te Whenua Land Information New Zealand. Coverage includes Nelson to Brightwater, including the Waimea River, State Highway 6 from Hira to Rai Valley and Ōkiwi Bay access road, plus Abel Tasman Drive, Bird Hill and Takaka Hill in Golden Bay.

Data comprises:

• DEM: tif or asc tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout

• DSM: tif or asc tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout

• Point cloud: las tiles in NZTM2000 projection, tiled into a 1:1,000 tile layout

Pulse density specification is at a minimum of 2.8 pulses/square metre.

Vertical Accuracy Specification is +/- 0.2m (95%) Horizontal Accuracy Specification is +/- 1.0m (95%)

Vertical datum is NZVD2016.

This layer provides polygons of approximate flood areas derived from Sentinel-1 satellite radar imagery captured at various times on 14/02/2023 near the peak of the Cyclone Gabrielle event in the North Island of New Zealand. Areas of coverage for this layer include the Hauraki, Thames-Coromandel and Hastings Districts, and Napier City.

​(Note: More accurate and validated flood extent models for the Hawke’s Bay region can be obtained from Hawke’s Bay Regional Council - Flood Observation Extents.)

​This dataset was created by Toitū Te Whenua LINZ as part of its contribution to the emergency response, and is limited to areas that had a satellite pass over, and to the few areas of interest as we knew them at the time.

​**Accuracy** Users of this data should exercise caution . The accuracy of this data has not been validated. A subjective threshold was used to determine possible flood areas and eliminate false positives. Polygons in hilly areas or below a certain area size were excluded as likely false positives.

Please use this data as advisory only. The results have not been ground truthed and will contain errors and ommissions.

Purpose: This data has been published to support the Waikato Regional Hazards Portal. This data is part of the Waikato District defended areas theme.Statement: Defended areas are those that are defended from flooding by structural defences such as stopbanks or floodwalls. These areas are not defended from all flood events. They are defended from flooding from a specified water course up to a specified design flood event. The water course defended from and the design flood event (described by the event frequency as an AEP) are provided in the attribute information as ‘Water Course’ and ‘AEP’ respectively. The data is presented as vector polygon data and was created for use in the Waikato District Plan Review (2019). Although the defended areas are defended by most flood events (depending on their level of protection), they still have the potential to flood. Defended areas may flood due to a larger than design event, or due to failure of a structural defence. This risk that remains is known as "residual risk". The Waikato Regional Policy Statement and Practise note (https://discover.wairc.govt.nz/otcs/llisapi.dll?func=ll&objaction=overview&objid=12000091) includes policies and methods about residual risk, including that residual risk zones shall be identified in District Plans. WRC Metadata: HAZARD.sdeadmin.HAZ_DEFENDED_AREA_LW_D_BENEFIT - HAZARDS - Regional Hazards Portal - GIS LayersTerms of Use: This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.Should users wish to distribute derivatives or modified versions of this data then they must seek a data use agreement through WRC first.See the Waikato Regional Hazards Portal Terms of use here Waikato Regional Hazards Portal - Terms of use | Waikato Regional Council.

Made available for NPDC GeoHUB (GIS Hub Site and Open Data Portal) :

Purpose: This data has been published to support the Waikato Regional Hazards Portal. This data is part of the River flooding theme.Statement: Polygon data created with the purpose to indicate to users of the Waikato Regional Hazards Portal where detailed flood modelling is available (when map is zoomed out/before local scale flood modelling is visible), and where the model boundaries are (for Thames Coromandel and Taupo Districts only). For the Waikato and Waipa Rivers, the data shows a less detailed version of the modelled 1% AEP flood extent (effectively a simplified 100m buffer applied around the modelled flood extent geometry). For the Thames Coromandel and Taupo Districts, the data shows the model boundaries, as rectangle polygon data.Data Use Limits: Flood model coverage data for Waikato and Waipa rivers is indicative only and should not be used/viewed at scales greater than 1:80,000. Flood model coverage data for Thames-Coromandel and Taupo Districts is actual model boundaries and can be viewed at scales greater than 1:80,000.WRC Metadata: See the full metadata for HAZARD.sdeadmin.HAZ_LOCAL_SCALE_FLOOD_MOD_COV - HAZARDS - Regional Hazards Portal - GIS LayersTerms of Use: This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.Should users wish to distribute or publish derivatives or modified versions of this data then they must seek a data use agreement through WRC first.See the Waikato Regional Hazards Portal Terms of use here Waikato Regional Hazards Portal - Terms of use | Waikato Regional Council.

An interactive viewer of the Bay of Plenty's natural hazards. Explore this map to discover information on the natural hazards that impact our region. Rebuilt in 2023.

Purpose: This data has been published to support the Waikato Regional Hazards Portal. This data is part of the River Flooding theme.Statement: This line data shows the locations of all cross sections for waterways in the Waikato Region, that have been surveyed by Waikato Regional Council. Many of these cross sections have associated flood modelling, and therefore flood levels (with various limitations). This data set is therefore intended to provide an indication of which waterways may contain flood modelling. Attribute information includes unique ID numbers, used to identify cross sections.For further enquires or flood level information, please contact the Regional Resilience team - Contact us | Waikato Regional Council WRC Metadata: For full metadata see HAZARD.sdeadmin.HAZ_CROSS_SEC_ALL_WAIKATO - HAZARDS - Regional Hazards Portal - GIS LayersTerms of Use: This work is licensed under a Creative Commons Attribution-NoDerivatives 4.0 International License.Should users wish to distribute or publish derivatives or modified versions of this data then they must seek a data use agreement through WRC first.See the Waikato Regional Hazards Portal Terms of use here Waikato Regional Hazards Portal - Terms of use | Waikato Regional Council.

Combined stormwater flooding results for WCC for a 1yrARI event including climate change. Includes the following catchments: Owhiro Bay, Horokiwi, Haitaitai & Kilbirnie, Karori, Roseneath, Island Bay, Lyall Bay, Southern CBD, Tawa, Johnsonville, Khandallah, &MiramarPurpose:Wellington City Council and Wellington Water are working together to create an updated flood hazard map for Wellington catchments.The main purpose of a flood hazard map is to provide up-to-date information to the community. It takes into account sea level rise and increased rainfall caused by climate change and will help people better prepare for existing flood risks and avoid inappropriate building in floodplains.The flood hazard map gives you the opportunity to see what your suburb would look like in a once in 10 year flood and a once in 50-100 year flood.The flood hazard maps, once verified, will appear in District Plans, will be available on LIMs, and will be a key document in the consents process. Current flood plans are available through the Council website.They’ve been completed to best practice standards and have been peer-reviewed by an external independent party.Data DetailsVertical Datum: 1953 Wellington City Vertical Datum.Coordinate System: NZGD 2000 New Zealand Transverse MercatorSmoothed Flood Modelling Results categorised into the following depth bands:0.05 – 0.10 m0.10 – 0.25 m0.25 – 0.50 m0.50 – 1.00 m> 1.00mData TraceabilityGIS data published by: Modelling Team (Rebecca Buchanan) 17-06-2020Original smoothed layers created by: Jacobs (Keith Hastings)11-06-2020Modifications:08-07-2020: Added Khandallah and Miramar(Published Referenced map service on 3rd Feb 2021, Chrissy)For any questions please contact Wellington Water

The East Cape has a history of “hits” from decaying tropical cyclones causing widespread flooding and disruption. There are also other events that are more localised and result from a weather system dumping a large volume of water in a small area. A recent study showed that there is a trend of less of these events, but when they occur more rain falls. Most areas north of Ruatoria have a higher average rainfall than the south of the district and can cope with high rainfall events. The Waikura Valley for example can get 200mms in a 24 hour period without any adverse effects. The populated areas likely to be worst affected in a large event are the Poverty Bay Flats, Te Karaka and the area just north of Tolaga Bay. More intense localised events such as the 1985 Ngatapa flood and the 1977 Glenroy flood also caused substantial damage. Most of the Poverty Bay Flats, during inundation, is not subject to fast flowing water but huge areas are subject to ponding, which after the water recedes, will leave thick layers of silt damaging pasture and fences. In the city a number of riverbank properties are at risk. Extensive flooding depends upon the tides, potential overflow from the Waipaoa River, storm surges and the flood-peak times of the Taruheru and Waimata Rivers.