Freshwater

Reducing the risk of new freshwater invasive species, minimising the impacts of these species, and developing methods for reducing or eradicating those populations.

A NIWA-led project to support anyone wishing to deploy a water quality sensor in rivers, lakes and estuaries.

NIWA's Urban Runoff Quality Information System (URQIS) provides planners, engineers and researchers with information about the quality of stormwater from different locations and landuses and under different flow conditions.

The New Zealand Freshwater Fish Database (NZFFD) contains over 50,000 freshwater fish observations from across New Zealand from 1901 to the present.

A new NIWA study in Wellington Harbour will help scientists find untapped drinking water around the world.

About 76 per cent of indigenous freshwater fish species, that’s 39 out of 54, are threatened with extinction or at risk of becoming threatened.

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.

Intensifying competition for water is increasing pressure on finite water resources (surface and groundwater), which manifests itself as depleted stream flows. As the concerns over water resources and the environment increase, the importance of combined water management, which acknowledges the integrated nature of groundwater and surface water, and manages them as a single resource, is critical to sustain both human society and aquatic and terrestrial ecosystems.

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

January was Auckland's wettest month since records began, according to meteorologists. The Central Auckland Rainfall series recorded a total of 539 mm of rain at Albert Park, smashing the previous monthly record of 420 mm from February 1869.