Water clarity is assessed with a 1 m long acrylic tube.
New Zealand has 425,000 kilometres of rivers and streams to look after. Catchment groups are being formed around the country ...
An industrial purple dye spill devastated the Oruarangi Stream ecosystem in 2013. It’s hard to believe such an event could ...
When you look across a lake, what colour do you expect to see? The common answer is usually blue – ...
We know that sound behaves quite differently under water, moving faster and further, but how well can we predict what ...
Clean water is vital for ecosystems and the economy. The National Institute of Water and Atmospheric Science (NIWA), regional councils ...
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