New Zealand Hydrogeological Systems


This hydrogeological system GIS dataset provide a nationally-consistent basis for hydrogeological mapping in New Zealand. This resource contains a download the NZ hydrogeological systems map and associated report.


Hydrogeological systems are defined here as geographical areas with broadly-consistent hydrogeological properties, and similar resource pressures and management issues. They include coastal basin, inland basin, coastal volcanic, inland volcanic, inland river valley, coastal independent, basement infill and basement hardrock.

  • Terms of Use

    This dataset is provided under Creative Commons C BY 4.0.0(external link)

    Where the dataset is used in a figure, GNS Science requests attribution in the following manner: © GNS Science 2019.

    Where reference to the dataset is to be included in a reference list please cite Moreau et al., 2019.

  • Download the dataset

  • About the GIS dataset

    The ‘NZ_hydrogeologicalsystem_polygon.shp’ provides seven hydrogeological attributes as follows:

    • unique name (HS_name)
    • unique identification (HS_id)
    • system type (HS_type)
    • coastal information (HS_coast)
    • aquifer overview (HS_overview)
    • geology and age group (HS_geo_gr)
    • geology and age descriptor (HS_geo_age).

    Nine system types are identified. The ‘NZ_hydrogeologicalsystem_boundary.shp’ attribute table identifies, the source and methods of boundary delineation.

Cite as: Moreau, M.; White, P.A.; Mourot F.; Rawlinson Z.; Tschritter C.; Cameron S.C.; Westerhoff R. 2019. (Revised 2023). Classification of New Zealand, GNS Science report; 2018/35. 28p.

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