Atmospheric analysis

River floods occur when water spills from a river channel onto land that is normally dry, and are one of New Zealand's costliest natural hazards.

An estuary is a partially enclosed body of water formed where freshwater from the land meets and mixes with saltwater from the ocean.

The world’s oceans are acidifying as a result of the carbon dioxide (CO2) generated by humanity.

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.

The scientific records of palaeotsunamis to have affected New Zealand shores can now be accessed in a new one-stop information shop.

An interactive guide to the intertidal sponges of New Zealand.

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.

Porirua at Mana Marina sea levels

Queens Wharf - Wellington sea levels

NIWA puts a lot of things in the ocean—instruments tied to moorings, floats that dive up and down measuring what’s going on in the water, and video cameras that monitor fish.

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