Description: Combined Earthquake Hazard, GWRC, 1996. This Combined Earthquake hazard shapefile is a compilation of all "combined earthquake hazard" coverages in major urban areas of the Western part of the Greater Wellington Region. The coverages represent overlays of all previous earthquake hazard data. i.e.:
1: Area of tsunami inundation
2: 20m buffer along major fault traces
3: Ground shaking
4: Liquefaction potential
5: Slope failure. Map publication reference: WRC/RP-T-96/15
For notes on how this coverage was created refer to:
Mapping methology and Risk Mitigation Measures Publication: WRC/RP-T-96/22.
https://mapping.gw.govt.nz/Preparation_of_EQ_hazard%20_maps_Ian_Brown_methodology_WRC_RP_T_96_22.pdf
Description: Earthquake Groundshaking Potential, GWRC, 1996. Ground shaking maps series in the major urban areas of the Wellington Region. This shapefile is compiled from the "ground shaking series" coverages. This map was accompanied by notes (GWRC Publication WRC/PP-T-92/45)
Description: Earthquake Liquefaction Potential. Liquefaction risk for the Wellington region based on pre-existing datasets, GNS, 2018.
Liquefaction risk is related to the type of soils present. This data shows the locations of soils that have a significant risk of liquefaction occurring, and the level of that risk for the entire region.
This data is based on exisitng geological maps published by GNS and similar investigations. This limits the usable scales of the data to between 1:50,000 and 1:250,000. Use at larger scales requires more detailed investigations first.
This data is best used in conjunction with the report from GNS referred to below. It is available to download from the GNS website at https://shop.gns.cri.nz/sr_2014-016-pdf/.
Dellow, G.D.; Perrin, N.D.; Ries, W.F. 2018 Liquefaction hazard in the Wellington region. Lower Hutt, N.Z.: GNS Science. GNS Science report 2014/16. 71 p.; doi:10.21420/G28S8J
Description: Earthquake Slope Failure potential. Earthquake induced slope failure susceptibility zones for the Wellington Region. This shapefile is compiled from the "slope failure series" coverages. See Publication WRC/PP-T-95/06 for accompanying notes
Description: Wellington Fault Zone. Received from WCC in 2008, from a Fault Study, this is the "Fault Recommended Hazard Zone" (FRHZ). See also https://wellington.govt.nz/~/media/your-council/plans-policies-and-bylaws/district-plan/volume03/files/v3map50.pdf?la=en
Description: Kapiti Fault Zones. Buffer zones for fault-related features mapped by IGNS for the Kapiti Coast District, 2002-2003. Based on air-photo interpretation. Commissioned by KCDC and GWRC.
Description: Wairarapa Fault Zones (URS,2006). Wairarapa areas showing zones containing 12 active fault traces. Supplied by URS Corp from results of a study commissioned by GWRC. These faults have a known recurrence interval of less than 5000 years. This data study was requested by Helen Grant, Hazards Analyst, & results sent to Iain Dawe, GWRC Hazards Analyst, in 2006. Excludes faults crossing DoC land. A 20 metre setback distance has been applied to both sides of the fault rupture zone to create fault avoidance zones. There is an accompanying report.
Each fault zone is assigned complexity attributes and a recurrence interval class.
Description: This dataset comprises Fault Awareness Areas (FAAs) for active and possibly active faults in selected parts of the South Wairarapa, Carterton and Masterton Districts (GNS CR2021/117). The FAAs were developed in accordance with the methodology recommended in Barrell et al. (2015) "Guidelines for using regional-scale earthquake fault information in Canterbury". GNS Science Consultancy Report 2014/211. Polygons with the same Fault Name and RI Class were merged and clipped in order of decreasing RI Class, or if overlapped by FAZs. These data should be used in conjunction with the associated GNS Science consultancy report (GNS CR2021/117).
Copyright Text: Litchfield NJ, Coffey G, Morgenstern R. 2022. Active fault mapping for the South Wairarapa, Carterton and Masterton Districts. Lower Hutt (NZ): GNS Science. 58 p. Consultancy Report 2021/117.
Description: Upper Hutt Fault Zones (IGNS,2005). Fault avoidance zones for the 5 known active faults in the Upper Hutt City TA area. Surveyed by IGNS for GWRC in 2005. See report 551.22 DIS 2 in the GWRC library; 'Upper Hutt City Fault Trace Project", R Van Dissen et al, IGNS Report 2005/151.
Description: Porirua District is traversed by three active faults: the Ohariu, Pukerua, and Moonshine faults. In recognition of the surface rupture hazard posed by these faults, Greater Wellington Regional Council and Porirua City Council commissioned GNS Science for a reassessment and update of the fault traces.A review was undertaken of all existing data. Fault features were re-mapped using high resolution 2012 LiDAR and colour aerial photographs supplied by Greater Wellington Regional Council and Porirua City Council, supplemented by 1940’s aerial photographs.The faults were then assessed following the guidelines issued by the Ministry for the Environment (MfE) on planning for development of land on, or near, active faults. The aim of the MfE guidelines is to assist resource management planners tasked with developing land use policy and making decisions about development of land on, or near, active faults. The MfE guidelines promote a risk-based approach when dealing with development in areas subject to fault rupture hazard.Fault Avoidance Zones were defined around all known active faults in Porirua District.
Description: LiDAR elevation data shows land elevation in centimetres above Mean High Water Springs-10 (MHWS10). MHWS10 is the mean high water spring tide exceeded 10 percent of the time, which is often used as a practical high tide level for infrastructure design works, and also for estimating extreme high (e.g. the 100-year Average Recurrence Interval) storm tides.
Description: Tsunami Wellington Region Evacuation Zones 2019. Wellington region tsunami evacuation map containing three zones; red, orange and yellow, corresponding to different threat levels. Last updated 2019.
The red zone, also known as the shore exclusion zone, can encompass wave heights with a 1% annual exceedance probability (i.e. 100 yr return period) from all sources (local, regional and distant). The orange zone was defined using probabilistic wave heights with a 0.2% AEP (i.e. 500 yr return period) from regional (1-3 hr travel time away) and distant sources (>3 hr travel time away).
The yellow zone was defined using probabilistic wave heights with a 0.04% AEP (i.e. 2500 yr return period) from all possible sources and corresponds to the maximum credible event. Further information can be found in the report: Leonard, G.S., et al (2008), Tsunami Evacuation Zones for Wellington and Horizons Regions Defined by a GIS-Calculated Attenuation Rule. GNS Science Report 2008/30, 22pp. Mueller, C., Power, W.L. and Wang, X. (2015), Hydrodynamic Inundation Modelling and Delineation of Tsunami Evacuation Zones for Wellington Harbour. GNS Science Consultancy Report 2015/176, 30 p.