Freshwater Update 82 brings you the latest information from our Freshwater & Estuaries Centre.

In this issue

  • Autonomous hydroacoustic boat mission

    NIWA’s recently commissioned autonomous hydroacoustic boat has been used to survey lakes for Auckland Council, including Lakes Rototoa and Tomarata. Hydroacoustic surveys provide detailed information about the underwater environment for lake management.
  • Uncovering the mysterious lives of longfin and shortfin eels

    Tuna or freshwater eels are a very significant, widely-valued, culturally iconic mahinga kai species.
  • Scientists help lamprey to spread the love

    Contraptions that resemble upside-down kitchen sinks have been placed in the Waikawa River in Southland to attract a notoriously elusive native fish species.
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    Grant awarded to continue mangrove research on UNESCO World Heritage site

    A team of NIWA and overseas researchers have been awarded a National Geographic Society explorer grant to continue their mangrove research in New Caledonia.
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    Protecting our lakes and rivers from invasive plants

    Invasive pests are a concern to the New Zealand public and to those responsible for pest management. Pest aquatic plants pose a significant threat to the New Zealand environment and economy. NIWA is working to help protect our freshwater ecosystems from the effects of these plants.
  • Essential Freshwater Package release, comment from NIWA published by the Science Media Centre

    The Government has released an Action Plan for Healthy Waterways, which aims to restore rivers and lakes within a generation.
  • Dynamic catchment modelling to estimate nitrogen losses in the Toenepi catchment

    Dynamic, processed-based integrated catchment models have the ability to simulate the changeable behaviour of complex processes in catchments. Since direct field measurements are rarely available at large-scales, these models help us to better understand hydrological and water quality processes.