Freshwater

See reports produced to guide potential adaptation strategies in the Lower Waikato region.

Investigating the effectiveness of an acoustic bubble-screen in minimising the movement of pest fish

Developing the monitoring and evaluation approaches that respond to the hauanga kai aspirations of Ngaati Mahuta

Developing a snowmelt forecast system to enable more accurate and confident forecasts of river flow and alpine hazards.

Transforming coastal lowland systems threatened by sea-level rise into prosperous communities

Updated 2025 – guidance for water quality monitoring in rivers, lakes and estuaries

Little is known what impact artificial streetlights have on flying freshwater insects which are integral to our waterway ecosystems.

A four-year research programme focused on the co-management and restoration of our freshwater taonga species.

NIWA is developing a national river flow forecasting tool for New Zealand that aims to support and strengthen our planning for and response to extreme rainfall events.

The project aim was to harness the filter-feeding capacity of native freshwater mussels on rafts to assist in lake restoration.

The Inner Hauraki Gulf/Tīkapa Moana ecosystem is facing proliferations of algae, de-oxygenation, reduced pH (acidification), reduced water clarity, and muddier sediments arising from historical and future land-derived contaminant inputs.

The eFlows Explorer webtool is designed to aid broad-scale river flow management planning across New Zealand