Downloadable and printable guides on identification of common freshwater invertebrates found in New Zealand waterways and lakes.

Antarctica is experiencing stunning skyscapes like those recently seen in New Zealand, thanks to the afterglow effect from the Tongan volcano.

Common questions about storms and cyclones in New Zealand.

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

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.

Land is tilled, sowed, and harvested for horticultural crops to grow.

Diverting water changes a waterways natural flow

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

Annual Climate Summaries from 2000 to present.

Write a report, with guided questions, to answer the question: “How cold is the Antarctic?”

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

This calculator estimates the solar energy that can be collected by a solar capture device (solar panel) at a given address, panel direction and roof slope.