Sustainable Yield Aquifer Assessment - Northland

Northland Regional Council engaged WM Group to assess sustainable yields for the volcanic rock aquifer system in the Maunu-Maungatapere-Whatitiri area.  The Whatitiri sub-zone of the aquifer system is the source of groundwater flows to Poroti Springs which have high cultural, ecological and economic significance.

WM Group used a 3D numerical Groundwater Vistas model to estimate the volumes of water that could be sustainably abstracted from sub-zones within the aquifer system without causing significant reductions in groundwater discharges to streams and Poroti Springs.

Results from the groundwater modelling have been used by Northland Regional Council as supporting information for setting groundwater allocation limits as part of the Northland Regional Plan Review.