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Water temperature and hydro
How do hydro-electricity activities potentially influence waterway temperatures? -
What ails our estuaries - problems and solutions
Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it. -
Mitigation and best practice options
Here are some simple steps to minimise the effects of dairying on water quality and mahinga kai. -
Climate change, global warming and greenhouse gases
Climate data and common terms explaining the causes and effects of climate change. -
Tuna - spawning grounds
All species of freshwater tuna spawn at sea, although the spawning grounds of only four species are known with certainty worldwide. -
Summer Series 8: The forces behind beach ‘foam’
News article06 June 2017 -
Nutrient overloading
Nutrients in waterways are essential for the growth of algae and aquatic plants but too much can destroy an ecosystem. -
Proud of your plants? 1 June 2017
News article01 June 2017NIWA 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. -
Mangroves: to clear or not to clear?
Media release19 May 2017NIWA 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 Technical Background report for MfE “Clean Water” Swimmability Proposals for Rivers
News article11 May 2017NIWA provides technical background information on "Clean Water" swimmability proposals. -
Paradise for eels? Getting to know the secrets of NZ's new icon
Feature story09 May 2017As New Zealand's "Mr Eel", Niwa's Dr Don Jellyman has heard every tall tale. And some of them may be true.
