Project Examples

Mapping Groundwater Discharge into Rivers Using Radon

Understanding how surface waters and groundwaters interact is an integral component of managing the influence of nutrient inputs to water quality. The aim of this research was to establish the potential of radon for measuring groundwater and river water interaction in two North Island, New Zealand gravel bed rivers. Test studies were carried out in the Hutt and Mangatainoka Rivers in the lower North Island.

Installation of lysimeters for measuring recharge to groundwater

Lysimeters are instruments measuring the proportion of water that infiltrates though the soil, from irrigation and/or rainfall, and contributes to groundwater recharge. Acquired data, combined with rainfall monitoring is required by Regional Councils and other organisations for water resource management purposes, including calibration of groundwater models and policy development. 

3D Geological Models – Earth Beneath our Feet


Assessments of geology to identify aquifers in three dimensional models of geology for a range of clients.

Rotorua Lakes Restoration Project

Lake Rotorua

A strategy to restore and protect the Rotorua lakes has been developped by Bay of Plenty Regional Council. GNS Science is involved as a project partner - to define and understand the groundwater cathment of Lake Rotorua, as knowing the extent of characteristics such as flow rates and length of water residence time of the catchment is vital to support decisions for remediation actions.

Denitrification Beds

Denitrification Beds

Affordable systems to remove nitrate from water and wastewater and reduce the environmental impact of industry and productive sectors.

Groundwater Sampling Protocol

Groundwater sampling

GNS Science have developed a national Groundwater Sampling Protocol in partnership with Greater Wellington Regional Council, Marlborough District Council, Environment Canterbury and the Ministry for the Environment.

Numerical Modelling in Motueka

numerical modelling

GNS Science have developed a FEFLOW 3-D finite-element groundwater-river interaction model to guide utilisation of groundwater resources, while ensuring acceptable amounts of stream flow during low flow periods.