Rivers

This project aims to increase our knowledge of aquatic ecosystems and their restoration, and apply this to degraded streams, rivers, lakes and estuaries.

NIWA scientists have launched a groundbreaking initiative that is transforming mapping of freshwater environments.

Could bubbles and strobe lights stop pest fish swimming where they’re not wanted?

NIWA and partners launch critical research to stop an invasive clam threatening New Zealand's freshwater ecosystem.

Introducing NIWA sediment transport scientist Clare Wilkinson.

Specialists in the chemical analysis of rivers, lakes, oceans and streams

Deep beneath Waitomo’s rolling hills lies a maze of caves and underground rivers. Here, NIWA researchers braved the dark waters to measure the current and hunt for fishy invaders under the twinkle of the cave’s magical glowworms.

River flows in New Zealand have changed dramatically over the past 50 to 90 years as the climate has varied, a new study has found.

Nearly half of New Zealand’s river network is partially or fully inaccessible to migratory fish, a new study shows.

This guide discusses design principles and provides high-level information about the likely performance of riparian buffers.

Estuaries are coastal waterbodies where freshwater mixes with seawater. Many estuaries in Aotearoa New Zealand have been impacted by pollutants and contaminants entering via freshwater.

New Zealand has just over 50 native freshwater fish species. Of these, 85 % are endemic and 75 % are deemed to be at risk of decline or are threatened.