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Sediment
When soils erode, sediments are washed into waterways. -
Kōaro
Kōaro are excellent climbers and like clear, swiftly flowing, forested streams. -
Sediment and forestry
How may forestry activities increase sediments in waterways? -
Cropping activities
The land used to produce crops is usually flat to gently rolling so it can be tilled, sowed, and harvested. -
Loss of riparian vegetation
Plants and trees along the water margins and banks are called riparian vegetation. -
Chemical contamination and aquaculture
What are the potential sources of chemical contamination from aquaculture activities? -
Chemical contamination and wastewater
What are the potential sources of chemical contaminants in wastewaters? -
Kōura
There are two species of kōura or freshwater crayfish in Aotearoa. -
What ails our estuaries - problems and solutions
Estuaries are at the bottom of the freshwater drainage network and, effectively, are a part of it. This means that every time we act to protect and enhance streams and rivers we are also benefiting the estuary at the downstream end. -
Mitigation and best practice options
Here are some simple steps to minimise the effects of dairying on water quality and mahinga kai. -
What do we measure?
Research ProjectA range of physical and chemical variables are measured in the NRWQN. -
Impacts of wood processing
Impacts of timber processing activities on water quality and mahinga kai.