Freshwater news

News and media releases related to our freshwater work.

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Recent research by NIWA scientists reveal that Blue Lake, in Nelson Lakes National Park, has extreme visual clarity, perhaps only exceeded worldwide by certain ocean waters, such as those in the SE Pacific near Easter Island.

Most of New Zealand's rain doesn't fall in the plains, but in the mountains, particularly the Southern Alps.
NIWA discusses, in depth, this year's most asked question—what is happening to our fresh waterways?

Lurking in the depths of freshwater waterways, all around New Zealand, longfin eels are the most common fish in our rivers. The native longfin eel, at up to 1.6 metres in length, is something to be in awe of, especially when there's a crowd of them – and they aren't the most attractive thing you've ever seen.

Returning water to our waterways after we’ve used it in our homes, on farms and in industry is a complex and challenging process.
Scientists have discovered an extensive body of freshwater off the Canterbury coast between Timaru and Ashburton.

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.

New research has revealed that citizen science monitoring of water is a win-win for scientists and volunteers—one gains access to new data, and the other the skills and confidence to become involved in discussions over what is happening to their streams.
At a rough count, 700 million litres of rain runs off the nation’s roads every year. That’s enough water to fill almost 300 Olympic-sized pools.
Science and Innovation Minister Steven Joyce has today announced the creation of a new freshwater institute between NIWA and the University of Waikato.
A whole of catchment Report Card for the Waikato and Waipa rivers has been released by the Waikato River Authority giving the catchment an anticipated low rating for its wellbeing.
NIWA researchers have spent part of the last month keeping a close eye on the bottom of Lake Tekapo to find out what it looks like and what is going on below the lake bed.
Scientists are taking some high-tech equipment to Fiordland next week to find out more about what happens when a river meets the ocean.
The increasing threat of marine pests to New Zealand’s biosecurity is the focus of a major new research project to be conducted by NIWA scientists.
NIWA scientists and Northland Regional Council staff are uncovering more of the mysteries of the North’s prized dune lakes using a canoe and some specialist hydro-acoustic surveying equipment.
Identifying creepy crawlies in your local stream just got a whole lot easier and faster, thanks to a new 3D identification system developed by a NIWA researcher.
NIWA researchers have produced a series of calendars to inform people when New Zealand's native freshwater and sport fish are migrating and spawning.
Water in the Blue Lake is the clearest freshwater ever reported.

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