The need to provide upstream passage facilities for ensuring the long term sustainability of migratory freshwater fish populations is now well recognised.

Stormwater poses risks to NZ’s urban streams & coastal waters, affecting ecological health & the cultural, social, & economic value of these environments.

Aotearoa’s main urban areas cover approximately 2% of total available land.

Explore our education and information section to find out about climate and climate change, weather, our atmosphere, estuaries and more.

An unavoidable delay in a research ship’s voyage to Antarctica resulted in some surprising and important findings about the behaviour of emperor penguins.

Here is our complete range of products.

There are two methods to determine visual clarity in SHMAK; the clarity tube (or SHMAK tube) and the black disc method.

If you're collecting sea shells at the beach this summer and wondering what they are, NIWA is here to help.

Trees are grown and converted into a range of useful timber and paper products.

View annual, seasonal and monthly summaries of temperature, rainfall and sunshine data from across New Zealand.