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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. -
River Environment Classification
The River Environment Classification (REC) is a database of catchment spatial attributes, summarised for every segment in New Zealand's network of rivers. -
Climate summaries
Education ResourceIn this climate education resource, you can download this climate summary in a range of formats. -
Map C North
Education ResourceAs this region is sheltered by high country to the south and east, it has less wind than many other parts of New Zealand. -
Water dams
Damming water for urban use, hydro-electric power generation, irrigation, and other industrial and commercial uses. -
What is Ocean acidification?
NIWA oceanographer Dr Cliff Law explains the impacts of ocean acidification on organisms that use carbonates to build their shells, and on bacteria. -
Extreme weather - heavy rainfall
Education ResourceHeavy rainfall is one of the most frequent and widespread severe weather hazards to affect New Zealand. -
Ecotoxicology services
ServiceNIWA offers a range of standard toxicity tests for both freshwater and marine environments. -
Wastewater treatment activities
Rural, urban, and suburban wastewater treatment methods. -
Wood processing
Trees are grown and converted into a range of useful timber and paper products.