How do hydro-electricity activities potentially influence waterway temperatures?

All aspects of the climate of Canterbury are dominated by the influence of the Southern Alps on the prevailing westerly airflows.

Annual Climate Summaries from 2000 to present.

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

What are the potential sources of sediments from land use activities?

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.

Whitianga Wharf sea levels

RV Tangaroa is New Zealand’s only ice strengthened and dynamically positioned deep-water research vessel.

Each waterway has its own particular characteristics relating to water flow, velocity, and quantity.