Freshwater

Preliminary analysis by NIWA climate scientists has shown that the recent Canterbury rainfall was so extreme in some inland places that it could be expected to happen only once every 200 years.

The prodigious rainmaker that hit Canterbury earlier this month saw NIWA field teams out in the elements collecting flood data from bridges, cableways and jetboat gaugings.

The eFlows Explorer webtool is designed to aid broad-scale river flow management planning across New Zealand

A NIWA scientist is asking for the help of skiers, mountaineers and alpine professionals to collect snow for a new research project.

Environmental monitoring technician Patrick Butler has spent hours travelling between the upper and lower reaches of Canterbury’s Waimakariri and Hurunui Rivers. His mission – river water quality sampling.

Estuaries provide a crucial link between our rivers and our seas. Sam Fraser-Baxter heads out with a NIWA research team keeping a close eye on these vulnerable transition zones.

How much is too much? Susan Pepperell looks at some of the tough decisions looming around access to freshwater and how science is helping with solutions.

Diquat is a herbicide (chemical) that has been used in New Zealand for many decades for submerged (underwater) weed control and also on agricultural crops. It is registered for freshwater use in New Zealand.

New Zealand’s native fish are doing their best to climb up ramps in a NIWA laboratory so scientists can learn how to better help them navigate our tricky waterways.

A web application tool to explore monitoring data and model predictions related to stream and estuary eutrophication

Dr Alvin Setiawan talks about recirculating aquaculture systems.

A six metre-long autonomous trimaran fitted out with a NIWA echosounder is being used as part of an innovative research collaboration.