Freshwater

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

  • Freshwater bioremediation using native mussels - focussed on shallow eutrophic lakes

    Research Project
    The project aim was to harness the filter-feeding capacity of native freshwater mussels on rafts to assist in lake restoration.
  • Irrigation Insight

    Feature story
    Irrigation Insight is a joint industry programme funded by MBIE to examine, on working farms, the ease and effectiveness of using high-resolution weather forecasting, production potential, and drainage estimations for on-farm water management.
  • Hauraki Integrated Land-Water Modelling

    Research Project
    The Inner Hauraki Gulf/Tīkapa Moana ecosystem is facing proliferations of algae, de-oxygenation, reduced pH (acidification), reduced water clarity, and muddier sediments arising from historical and future land-derived contaminant inputs.
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    Report: Trends analysis for selected indicators of Waikato River health and wellbeing 2010-2019

    Service
    Report: Trends analysis for selected indicators of Waikato River health and wellbeing 2010-2019
  • Check Clean Dry actions

    The Check Clean Dry Campaign aims to stop the spread of freshwater pests by encouraging people going through more than one waterway to check, clean and dry their gear in between.
  • Protecting our taonga together

    Feature story
    Alex Fear looks at the Cultural Keystones Species research programme, a research partnership that grew out of the vision of a Ngāti Hau kaumatua.
  • Supercharging the view from above

    Feature story
    From the rocky shores of Wellington’s South Coast to the icy waters of Antarctica, NIWA scientists are combining drone technology with advanced computer skills to map, measure and analyse the natural environment as never before. Campbell Gardiner explains.
  • The largest flood flow ever measured

    Media release
    Flood flows on the Buller River this month were the largest of any river in Aotearoa New Zealand in almost 100 years, NIWA measurements show.
  • Murchison Mountains electronic weather station (EWS)

    The Murchison mountains SIN station is located at 1140 m elevation in Fiordland National Park. Because of the low elevation, snow often comes and goes throughout the winter season. Snow records start in 2012.
  • Castle Mount electronic weather station (EWS)

    Castle Mount electronic weather station is at 2000 m elevation on an exposed site above the Milford Track. Records here begin in 2012. Strong winds limit snow accumulation during the winter.
  • Mount Larkins electronic weather station (EWS)

    The Mount Larkins electronic weather station is located east of the main divide near Glenorchy and Lake Wakatipu at 1900m elevation.
  • Mueller Hut electronic weather station (EWS)

    Mueller Hut electronic weather station is at 1818m elevation and located in Mount Cook/Aoraki National Park. This site also measures solic precipitation and solar radiation. This is the deepest (~3m) of all the snow and ice network sites and records at this site start from 2010.