Depth to hydrogeological basement (national map)

This data set provides an update of New Zealand’s depth to hydrogeological basement map. Depth to hydrogeological basement can be loosely defined as the ‘base of aquifers’; or more strictly as ‘the depth to where primary porosity and permeability of geological material is low enough such that flued volumes and flow rates can be considered negligible’. For more detail on the process and methods, see Westerhoff et al. (2019). New Zealand groundwater atlas: depth to hydrogeological basement. Lower Hutt (NZ): GNS Science. 19 p. Consultancy Report 2019/140. DOI: https://doi.org/10.21420/FQXD-VY44 Cite data as: GNS Science. (2019). Depth to hydrogeological basement [Data set]. GNS Science, Ministry for the Environment. https://doi.org/10.21420/FQXD-VY44 Cite report describing the data as: Westerhoff et al. (2019). New Zealand groundwater atlas: depth to hydrogeological basement. Lower Hutt (NZ): GNS Science. 19 p. Consultancy Report 2019/140.