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

Most of this climate zone is characterised by cool coastal breezes, and absence of shelter from the unsettled weather that moves over the sea from the south and southwest.

A range of physical and chemical variables are measured in the NRWQN.

QGIS is a free, open source, desktop mapping tool, widely used in New Zealand in government, research, commercial and NGO arenas.

Aotearoa’s main urban areas cover approximately 2% of total available land.

A glossary of common climate change and meteorological terms.

There are different types of instrument available for measuring water level.

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.

NIWA provides national capabilities in Water Quality Monitoring.

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