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GNS National Water Table interactive map

Interactive web map

This dataset and interactive map is a model-derived steady-state mean water table at the New Zealand nationwide scale with a resolution of 250m x 250m.

Overview

These data are described in Westerhoff et al. (2018)(external link)

The model used aimed for a solution that obtains a nationwide overview of groundwater that bridges the gap between the (too-)expensive advanced local models and the (too-)simple global-scale models. The model is inspired by an existing, global-scale, groundwater flow model and improved by feeding in national input data of New Zealand terrain, geology, and recharge, and by slight adjustment of model parametrisation and model testing. The resulting nationwide maps of hydraulic head and water table depths show that the model points out the main alluvial aquifers with fine spatial detail.

Explore Interactive Map

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    National water table are provided as a zipped file that contains two geotiff formatted files: 1) hydraulic head in metres above sea level (masl) and 2) water table depth (wtd) in metres below ground level (mbgl). Data are mapped in the New Zealand Transverse Mercator Projection (EPSG:2193).

    Download the national water table data here (ZIP, 30 MB)

  • Terms of Use

    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 the datasets is used for research, GNS Science requests acknowledgement of the publication describing these data: Westerhoff, R.S.; White, P.A.; Miguez-Macho, G. 2018 Application of an improved global-scale groundwater model for water table estimation across New Zealand. Hydrology and Earth System Sciences, 22(12): 6449-6472; doi: https://doi.org/10.5194/hess-22-6449-2018(external link) “

    GNS Science does not warrant or represent that the Data is accurate or complete, nor that it is fit for any purpose. The parties acknowledge that the Data is being licensed to Recipient for business purposes and that the Consumer Guarantees Act 1993 does not apply.

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