Atmospheric analysis

View a collection of maps showing the impact of past El Niño and La Niña events.

Learn how to use the New Zealand Freshwater Fish Database (NZFFD)

This manual prescribes a set of sampling and analysis protocols applicable to most of the common stream habitats in New Zealand.

A high proportion of New Zealand’s native freshwater fish fauna need to migrate to and from the sea.

Station height is in metres above mean sea level. Years of data are the number of complete years of data for the 1981 – 2010 period.

Mountainous areas are subject to heavy snowfalls, high winds, and low temperatures. Semi-permanent snow and ice fields exist at about 1000-1100 metres during winter.

Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.

Returning water to our waterways after we’ve used it in our homes, on farms and in industry is a complex and challenging process.

We have an exciting range of career opportunities at NIWA in both the scientific and professional support areas.

Water clarity or turbidity is the cloudiness or haziness in a fluid caused by individual small particles (suspended solids).