Freshwater

We provide public information on river, lake, and groundwater conditions across New Zealand including freshwater quantity and quality.

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    Summer Series 4: Life in the (ex) stream - exploring New Zealand's fabulous freshwater fauna

    News article
    Our freshwater fauna are wonderfully diverse and, according to NIWA Freshwater Ecologist Dr Richard Storey, there's nothing among them that we need to be afraid of.
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    LakeSPI method summary

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    Reporting guidelines

    LakeSPI delivers information that is directly applicable to lake-ecosystem conservation and management. It is being widely used in regional environmental monitoring programs and for national and regional reporting.
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    Uses of LakeSPI

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    How LakeSPI works

    LakeSPI (Lake Submerged Plant Indicators) is based on the principle that New Zealand lakes can be characterised by the composition of native and invasive plants growing in them, and the depths to which these plants grow.
  • Staying ahead of water weed invasions

    Research Project
    Aquatic systems are under threat due to the introduction of invasive exotic species such as water weeds. Modelling work by NIWA has provided new information on which water bodies may be at greatest risk.
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    Formal identification keys

    Formal identification keys are the scientifically accepted way to identify species. These will allow the identification of species which are unclear when using quick guides.
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    An Overview of New Zealand's Freshwater Fish Fauna

    Compared to other countries, New Zealand has a sparse freshwater fish fauna of just over fifty species. But it is unique and comprises at least thirty-five native species of which thirty-one are found only in New Zealand.
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    Publications - mitigation systems (formerly rehabilitation and protection)

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    Freshwater biosecurity - publications

      
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    Catchments to estuaries - publications

  • Causes and effects of water quality degradation - publications

    These are some recent publications related to the causes and effects of water quality degradation programme.