Atmospheric analysis

NIWA expends considerable effort on determining the age of commercial fish species. But why age a fish? And how do we do it?

Casal2 is an advanced software package developed by NIWA for modelling the population dynamics of marine species.

NIWA provides national capabilities in Water Quality Monitoring.

River floods occur when water spills from a river channel onto land that is normally dry, and are one of New Zealand's costliest natural hazards.

The main characteristic of the Marlborough climate is its dryness. Summer droughts are frequent, and the region is often swept by warm, dry northwesterlies.

Last Updated: July 2025

Impacts of mining on water quality and mahinga kai.

NIWA has working relationships with hundreds of organisations in New Zealand and overseas.

These datasets are available in a range of formats.

Freshwater eels have an unusual life cycle which sees them travelling between the ocean, estuaries and freshwaters.