Rivers

NIWA discusses, in depth, this year's most asked question—what is happening to our fresh waterways?

Returning water to our waterways after we’ve used it in our homes, on farms and in industry is a complex and challenging process.

NIWA is doing a nationwide study to discover what makes the best riparian projects. Help us give you the knowledge to make the best riparian management decisions possible by taking our 5 minute survey.

NIWA is developing numerical models for predicting how the morphology of braided rivers responds to flow regulation and invasive exotic woody vegetation.

NIWA is developing numerical models for predicting how the morphology of braided rivers responds to flow regulation and invasive exotic woody vegetation.

Tools and software to assist with determining and managing environmental water flows.

New Zealand’s freshwater and estuarine resources provide significant cultural, economic, social, and environmental benefits. Competition for the use of these resources is intensifying, and many rivers, lakes and estuaries are now degraded.

This research project investigated whether the mechanisms for periphyton removal in rivers relate more directly to hydraulic and geomorphic conditions than flow metrics.

Once you have identified the problem, and applied the necessary tools for restoring kōura to your stream, the next phase of your project is to monitor the site to see whether restoration works.

The tools available for restoring kōura to lakes and streams depend on what is causing kōura to decline.

Habitat and biological factors factors affect why kōura rare or absent in your waterway.

First, determine if kōura should be present in your stream.