Monthly data of 1km x 1km rainfall recharge to groundwater, from Jan-2000 – Dec-2014. The National Groundwater Recharge Model (NGRM) was developed to demonstrate the utility of satellite data and global models by development of a rainfall recharge model that is consistent over all regions of New Zealand. The NGRM has a 1 km × 1 km model grid that covers most of New Zealand and uses a cell-by-cell soil water balance approach to estimate rainfall recharge. DOI: https://doi.org/10.21420/MPSD-P640 Cite Dataset as: GNS Science. (2019). Nationwide Groundwater Recharge Model [Data set]. GNS Science. https://doi.org/10.21420/MPSD-P640

This dataset is a model-derived steady-state mean water table at the New Zealand nationwide scale with a resolution of 250m x 250m. These data are described in Westerhoff et al. (2018) – URL: https://hess.copernicus.org/articles/22/6449/2018/ . 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. DOI: https://doi.org/10.21420/KZ52-NT28 Cite Dataset as: GNS Science. (2018). National water table model [Dataset]. GNS Science. https://doi.org/10.21420/KZ52-NT28