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

An estuary is a partially enclosed body of water formed where freshwater from the land meets and mixes with saltwater from the ocean.

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

Pauanui South Cam-era station

NIWA collects and manages significant amounts of New Zealand's environmental data, particularly in the climate, freshwater, marine and atmosphere domains.

NIWA offers a range of standard toxicity tests for both freshwater and marine environments.

Forest plantations in Aotearoa can be found on flat, gently rolling, or very steep terrain.

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.

Read about how NIWA can map any aspect of climate to help guide your organisation's response to a changing and variable climate.

Some simple steps to minimise the effects of mining activities on water quality and mahinga kai.

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