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Hydro
Hydro-electricity is a renewable energy source that relies on the inflow of water into storage lakes upstream of a dam. -
Freshwater databases online
More information about our online freshwater databases. -
Analysis of water quality trends
NIWA has developed a powerful software tool for the analysis of water quality data. -
Mahinga kai and migration
A high proportion of New Zealand’s native freshwater fish fauna need to migrate to and from the sea. -
Algae ID guides
A collection of ID guides to algae. Groups include major freshwater algal groups, diatoms and blue-green (cyanobacteria), red and green algae. -
Ecotoxicology services
ServiceNIWA offers a range of standard toxicity tests for both freshwater and marine environments. -
Chemical contamination
Chemical contaminants are chemicals toxic to plants and animals in waterways. -
Causes of sedimentation
What are the potential sources of sediments from land use activities? -
Biological limitations
Identifying biological factors that may be limiting fish numbers requires sampling to ensure that key invertebrate prey species are not scarce and that pest fish, especially predators, are not abundant. -
The impact of El Niño and La Niña on New Zealand's climate
El Niño accounts for less than 25 percent of the year-to year variance in seasonal rainfall and temperature at most locations in New Zealand. -
Summer Series 8: The forces behind beach ‘foam’
News article06 June 2017
