This map package contains data that is part of the report "Liquefaction Hazard Mapping- Whangarei District" prepared by T+T for WDC in 2020. Refer to the report for further detail and applicability limitations.

20200804.jicr.T+T report.Liquefaction Hazard Mapping_Whangarei District.pdf

This map package contains data that is part of the report "Liquefaction Hazard Mapping- Whangarei District" prepared by T+T for WDC in 2020. Refer to the report for further detail and applicability limitations.

20200804.jicr.T+T report.Liquefaction Hazard Mapping_Whangarei District.pdf

Intent is to provide WDC with a district-wide liquefaction hazard management layer to help inform spatial planning and assessment of land use, subdivision and building consents.

This assessment has been made at a broad scale across the entire district, and is intended to approximately describe the typical range of liquefaction vulnerability across neighbourhood-sized areas. It is not intended to precisely describe liquefaction vulnerability at individual property scale. This information is general in nature, and more detailed site-specific liquefaction assessment may be required for some purposes (e.g. for design of building foundations). As discussed in Section 3.3.6, in many of these areas the nature of the expected ground conditions means that if more detailed site-specific assessment was undertaken in future then this would likely indicate a category of “Low Liquefaction Vulnerability”. For future assessments, it is likely that site walkovers to confirm exposed rock or simple shallow hand auger boreholes to confirm soil plasticity and/or groundwater depths will efficiently determine which liquefaction vulnerability category applies.