Freshwater

Access commonly cited references for the NZFFD and the Catchments of New Zealand publication.

Our biosecurity management tools include: assessment models, field surveys, management advice and the testing of control methods.

A Ministry for Primary Industries-funded study has shown that grass carp, in enclosures, can be used as an effective means of controlling invasive plant species in our waterways.

This is a user guide on non-native fish, reptile, invertebrate, algal and plant species that are recorded in New Zealand freshwaters.

FRAM is powerful and simple to use - series of straight-forward questions about the biology and behaviour of any alien species lead to it being ranked and categorised as a high, intermediate, or low ecological risk.

More information about our sediment tools.

More about our restoration tools.

We offer a range of catchment modelling services.

Many of New Zealand's aquatic ecosystems, and their services, are in a degraded and often worsening state. NIWA is involved in research and consultation' aimed at improving the health of our freshwater systems.