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: 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.