On 1 July 2025, NIWA merged with GNS Science to become Earth Sciences New Zealand.

Coasts

NIWA aims to provide the knowledge needed for the sound environmental management of our marine resources.

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    The life of an estuary

    An estuary is a semi-enclosed embayment, with a free connection to the sea at one end and a freshwater supply at the other.
  • NZ estuaries

    Over the past decade, NIWA has published many popular articles that deal with estuaries - this overview is intended to bring together and make whole sense of the information published to date in the various popular articles.
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    Tools & Resources

  • Other research instruments

    Service
    Scientists across NIWA use specialist tools manufactured across the world to perform their research and environmental consultancy.