Freshwater

Rural, urban, and suburban wastewater treatment methods.

How can mining activities influence sediments in waterways?

The New Zealand Fish Passage Guidelines sets out recommended practice for the design of instream infrastructure to provide for fish passage.

Kaitiaki Tools is a guide to teach people (especially hapū and iwi groups) who manage the resource consent process.

NIWA is leading a new six-year research project that seeks to increase our understanding of piharau/kanakana/lamprey, using Mātauranga Māori, social science and biophysical science approaches.

Tuna or freshwater eels are a very significant, widely-valued, heavily-exploited, culturally iconic mahinga kai resource.

Submerged plants have a number of advantages that favour their use as indicators of lake ecological condition.

Diverting water away from its natural channel for commercial or private use.

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 scientists have written a guide for managing mangroves, prompted by a desire for people to learn more about mangrove ecosystems, and what happens when they are removed.

NIWA provides technical background information on "Clean Water" swimmability proposals.

As New Zealand's "Mr Eel", Niwa's Dr Don Jellyman has heard every tall tale. And some of them may be true.