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Suspended-sediment yield estimator
This national GIS ‘layer’ enables reconnaissance-scale estimation of suspended-sediment yields from New Zealand’s rivers and streams. It has been developed by NIWA in collaboration with Landcare Research. -
Water take
Water take (also known as water abstraction) has a range of valuable public and private uses. -
Ecotoxicology services
ServiceNIWA offers a range of standard toxicity tests for both freshwater and marine environments. -
Sediment and forestry
How may forestry activities increase sediments in waterways? -
Chemical contamination
Chemical contaminants are chemicals toxic to plants and animals in waterways. -
Cropping activities
The land used to produce crops is usually flat to gently rolling so it can be tilled, sowed, and harvested. -
What do we measure?
Research ProjectA range of physical and chemical variables are measured in the NRWQN. -
Algal monitoring service
ServiceBlooms of hazardous cyanobacteria (blue-green algae) in rivers, lakes and reservoirs can cause problems for both animal and human health. -
Altered water flow (hydrology)
Each waterway has its own particular characteristics relating to water flow, velocity, and quantity. -
Analysis of water quality trends
NIWA has developed a powerful software tool for the analysis of water quality data.
