Information about groundwater in the Canterbury Region.
Groundwater can be defined as fresh, brackish or saline water contained in water-bearing layers below the ground. The Canterbury Plains groundwater system includes water contained in alluvial gravel deposits and fine sediments, extending into underlying tertiary sediments.
Throughout the region, on both the plains and in the hill country, the groundwater system has different characteristics depending on soil types, the geological formations under the ground and the effects of seismic activity over thousands of years.
In Canterbury, due to a dramatic increase in demand, groundwater use now surpasses out-of-river water use. Environment Canterbury’s management of groundwater has immense significance for future productivity in the region, for the maintenance of ecosystems sustained by groundwater and for the Christchurch metropolitan water supply.
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