Freshwater

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

Rachel Crawford and Paul Franklin inspecting a fish passage on the Waikato River.

Freshwater and Estuaries Update

A seasonal review and outlook for New Zealand's water resources, and an update on NIWA's freshwater research

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    Causes of Infectious Substances

    What are the potential sources of infectious substances from land use activities?
    Freshwater quality

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    If we restore it will they come?

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    Riparian vegetation and mining

    What are the potential impacts of mining activities on riparian vegetation around waterways?

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    Reintroduction: risk factors

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    Stoneflies

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    Life history of invertebrates

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    Monitoring and maintenance

    Once you have identified the problem, and applied the necessary tools for restoring fish to your stream, the next phase of your project is to monitor the stream site to see whether restoration works.
    Freshwater quality

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    Tools

    The tools available for restoring native fish to streams depend on what is causing fish to decline.
    Fisheries

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    Identifying the problem

    Identifying the factors causing fish numbers to drop will allow you to determine which restoration tools you need to employ.
    Fisheries

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    Chemical contamination and energy

    What are the potential sources of chemical contamination from energy generation activities?

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    Riparian vegetation and energy

    How do energy generation activities potentially impact riparian vegetation around a waterway?

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    Water take and energy

    How do energy generation activities potentially influence water flows?