Name: Waitaki liquefaction vulnerability categories (2023)

Display Field: LIQ_CAT

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Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>This dataset provides</SPAN><SPAN>updated</SPAN><SPAN>liquefaction vulnerability categories for the Canterbury part of Waitaki District. The vulnerability categories are those set out in the Ministry for Business, Innovation and Employment and Ministry for the Environment's 2017 </SPAN><SPAN STYLE="font-style:italic;">Planning and engineering guidance for potentially liquefaction-prone land</SPAN><SPAN>. The </SPAN><SPAN>liquefaction </SPAN><SPAN>categories were revised from the liquefaction susceptibility dataset supplied to Environment Canterbury by GNS Science in September 2020 as part of the Waitaki District Plan review. The </SPAN><SPAN>original </SPAN><SPAN>2020 dataset was derived from a Level A (Basic Desktop) assessment using available geological, geomorphological, and groundwater information. </SPAN><SPAN>In this 2023 dataset we have made m</SPAN><SPAN>inor revisions to</SPAN><SPAN>the original 2020</SPAN><SPAN>polygon boundaries to better fit the detail of the geomorphology interpreted from available lidar and aerial imagery, and</SPAN><SPAN>have changed the </SPAN><SPAN>nomenclature and attribute fields to follow the 2017 </SPAN><SPAN>MBIE/MfE liquefaction </SPAN><SPAN>guidance. </SPAN></P><P><SPAN>Accompanying reports are </SPAN><SPAN>Barrell, D.J.A.</SPAN><SPAN>,</SPAN><SPAN>2020. </SPAN><SPAN STYLE="font-style:italic;">Assessment of liquefaction hazards in the Waitaki District within the Canterbury region</SPAN><SPAN>. Lower Hutt (NZ): GNS Science. 34 p. Consultancy Report 2020/69</SPAN><SPAN> </SPAN><SPAN>and Jack, H., 2023. </SPAN><SPAN STYLE="font-style:italic;">Revised liquefaction information for the Canterbury part of Waitaki District</SPAN><SPAN>, Environment Canterbury Science Summary Report</SPAN><SPAN> R23/51</SPAN><SPAN>.</SPAN></P></DIV></DIV></DIV>

Copyright Text: Original dataset drawn by David Barrell, GNS Science, September 2020. This revision drawn by Helen Jack, Environment Canterbury, October 2023 and reviewed by David Barrell, GNS Science.

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Spatial Reference: 2193  (2193)

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• Value: Liquefaction damage is possible
  Label: Liquefaction damage is possible
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• Value: Liquefaction damage is unlikely
  Label: Liquefaction damage is unlikely
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• Value: Liquefaction damage is unlikely (very low liquefaction vulnerability)
  Label: Liquefaction damage is unlikely (very low liquefaction vulnerability)
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