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Wellington Region

Ruamahanga River at Wardells

The Ruamāhanga River is the largest river in the Wairarapa.  With headwaters in the Tararua Ranges, the river flows through the Wairarapa Valley for about 130 kilometres. 

This site is located in the middle reaches of the Ruamāhanga river, approximately one kilometre upstream from the Waingawa confluence.

Flow Data
Scientific data for this flow site
  • Live Flow Data
    Latest sample:
    Percentage of time flow exceeded
    High flowLess than 5%
    Elevated flow5% to 29%
    Normal flow30% to 69%
    Reduced flow70% to 94%
    Low flow95% to 100%
    Show more information Hide

    • Last 24 hours
    • Last 7 days
    • Last 30 days

    Key figures

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    Other notable measurements

    Droughts Month/Year Flow
    December 1960 0.001
    Floods Month/Year Flow
    October 1998 844