Browsing by Series "ERI report"

Now showing items 41-60 of 77

  • Fishing activity in the Waikato and Waipa rivers

    Hicks, Brendan J.; Allan, Dave G.; Kilgour, Jonathan T.; Watene-Rawiri, Erina M.; Stichbury, Glen; Walsh, Cameron (Environmental Research Institute, The University of Waikato, 2013)
    The purpose of this research project is to collate information regarding the recent use of fisheries resources in the Waikato River and Waipa River catchment areas. In particular, the project sought to summarise the ...
  • Hydrodynamic modelling of Lake Whangape and Lake Waahi

    Jones, Hannah Frances Emily; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2014)
    The University of Waikato was contracted by Waikato Regional Council to develop hydrodynamic models for Lake Whangape and Lake Waahi. The models are intended to provide a basis for future water quality modelling to inform ...
  • Hydrodynamic modelling of proposed expansion of the Port of Tauranga shipping channels and wharves

    Mullarney, Julia C.; de Lange, Willem P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2018)
    The impact of the Stella Development Plan, specifically proposed wharf, reclamation and channel extensions, on the hydrodynamics of Tauranga Harbour were investigated using a depth-averaged barotropic numerical model, ...
  • Invasive fish survey of Lake Arapuni by boat electrofishing

    Tempero, Grant Wayne; Powrie, Warrick; Kim, Brian (Environmental Research Institute, 2017)
    A boat electrofishing survey of Lake Arapuni was conducted on 2 February 2017 by the University of Waikato to investigate anecdotal reports of koi carp (Cyprinus carpio) presence in the lake. Nine 10-minute electrofishing ...
  • Lake Rotokakahi water quality modelling

    Jones, Hannah Frances Emily; Özkundakci, Deniz; Kochendoerfer, Sascha; McBride, Chris G.; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2014)
    Lake Rotokakahi is an iwi-owned lake, administered by the Lake Rotokakahi Board of Control. The lake has a surface area of 4.4 km2, a mean depth of 17.5 m, and a catchment of 19.7 km2 of which most is in exotic forest ...
  • Lake Rotokakahi water quality update 1990-2011

    Butterworth, Joseph (Environmental Research Institute, The University of Waikato, 2012)
    Lake Rotokakahi is an Iwi-owned lake administered by the Lake Rotokakahi Board of Control on Behalf of lake owners who are descendants from the Ngāti Tumatawera and Tūhourangi hapū of Te Arawa. It is mesotrophic (moderate ...
  • Lake Rotorua and Lake Rotoehu: Total and non-crystalline aluminium content in bottom sediments

    Tempero, Grant Wayne; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2016)
    The application of alum (aluminium sulphate) is widely used for lake restoration. Aluminium binds dissolved reactive phosphate (DRP) reducing its availability to phytoplankton and inhibiting algal blooms. The Bay of Plenty ...
  • Lake Rotorua sediment survey

    Özkundakci, Deniz; Pearson, Lisa K.; McBride, Chris G.; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2014)
    Water quality in Lake Rotorua has improved over recent years, with reductions of nitrogen, phosphorus and chloropyll a concentrations, and increased water clarity. These changes coincide with alum dosing of the Utuhina and ...
  • Lake Rotorua treated wastewater discharge: Environmental effects study

    Abell, Jonathan Michael; McBride, Chris G.; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2015)
    Rotorua Lakes Council is undertaking a decision-making process to resolve how treated municipal wastewater from the city of Rotorua (Bay of Plenty) should be discharged after 2019, when irrigation operations at the Land ...
  • Lake Tutira: historic water quality, monitoring recommendations and management options

    Abell, Jonathan Michael; McBride, Chris G.; Hamilton, David P. (Environmental Research Institute, The University of Waikato, 2013)
    Lake Tutira is located 30 km north of Napier and is an important recreational resource for the Hawke's Bay region. The lake has an area of 1.74 km², mean depth of 21 m and maximum depth of 42 m. It has a recent history of ...
  • Life history analysis of chinook salmon (Oncorhynchus tshawytscha) from lakes Mapourika and Paringa, West Coast, South Island, New Zealand, by otolith microchemistry

    Hicks, Brendan J.; Tana, Raymond (Environmental Research Institute, The University of Waikato, 2013)
    Otolith microchemistry is an established technique for determining fish migrations between the sea and freshwater. The aim of our study was to determine life history patterns of chinook salmon collected from rivers and ...
  • Life-history of Lake Horowhenua common smelt: analysis of otolith chemistry and vertebral counts

    Tana, Raymond; Tempero, Grant Wayne (Environmental Research Institute, The University of Waikato, 2013)
    Lake Horowhenua is a coastal eutrophic lake on the west coast of the North Island. A recent survey of the lake found lower than expected fish diversity but comparatively abundant native fish populations, comprising mostly ...
  • Mercury Bay Coastal Processes Study: Data Report for 2014 & 2015.

    Walker, Justin H.; Immenga, Dirk; Sandwell, Dean R.; Bryan, Karin R. (Environmental Research Institute, The University of Waikato, 2015)
    Two month-long hydrographic and sedimentation field campaigns were conducted from July 15th, 2014 to August 13th, 2014 and from April 9th, 2015 to May 8th, 2015 within the Mercury Bay-Whitianga Inlet-northern Whitianga ...
  • Modelling the impact of sewage reticulation in the Lake Tarawera catchment

    Dada, Ayokunle Christopher; McBride, Chris G.; Verburg, Piet; Hamilton, David P. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2016)
    In order to inform efforts being considered for the management of catchment sources of nutrient pollution into Lake Tarawera, a study was commissioned by the Lake Tarawera Ratepayers Association. This study, conducted by ...
  • A molecular-based assessment tool for characterising New Zealand freshwater zooplankton communities

    Watson, Nathan Thomas Noble; Duggan, Ian C.; Collins, Gemma Elyse; Beet, Clare Rose; Woods, S.M.; Banks, Jonathan C.; Hogg, Ian D. (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2014)
    The ability to adequately assess ecosystem health is essential for informed resource management. Freshwater zooplankton respond rapidly to environmental changes in pest fish populations and nutrient loads and can therefore ...
  • Monitoring of subtidal reef biota off Motuotau Island in relation to dredge spoil dumping by the Port of Tauranga Ltd 2014-2018

    Ross, Philip M. (Environmental Research Institute, University of Waikato, 2018)
    Background • Dredge spoils generated from the development and maintenance of the Port of Tauranga is disposed of on the inner shelf off Mt Maunganui. • Major channel deepening and widening programmes were undertaken in ...
  • Physical and chemical attributes affecting survival and collection of freshwater mahinga kai species

    Collier, Kevin J.; Clearwater, Susan J.; Harmsworth, Garth; Taura, Yvonne; Reihana, Kiri (Environment Research Institute, The University of Waikato, 2017)
    Mahinga kai is one of a number of significant Māori values identified within the National Objectives Framework (NOF) for freshwater management. The Ngā Tohu o Te Taiao (NToTT) project aimed to develop knowledge, tools and ...
  • Potential science tools to support mahinga kai decision-making in freshwater management

    Collier, Kevin J.; Death, Russell G.; Hamilton, David P.; Quinn, John M. (Environmental Research Institute, The University of Waikato, 2014)
    Mahinga kai is a key value for freshwater management that needs to be articulated in objective setting for environmental limits in the National Objectives Framework (NOF). Mahinga kai generally refers to indigenous freshwater ...
  • Preliminary analysis of boat electrofishing in the Waikato River in the vicinity of the Huntly Power Station: Part 1 - fishing on 2 September 2013

    Hicks, Brendan J.; Tempero, Grant Wayne (Environmental Research Institute, The University of Waikato, 2013)
    This report gives a basic summary of the first sampling of a three-part monitoring project for Genesis Power Ltd (Genesis) that the University of Waikato is undertaking in close collaboration with National Institute of ...
  • Puarenga Stream alum dosing – Summary of effects on lake biota 2015

    Ling, Nicholas (Environmental Research Institute, Faculty of Science and Engineering, The University of Waikato, 2016)
    Continuous alum dosing of the Puarenga Stream commenced in early 2010 to reduce inflows of dissolved reactive phosphorus to Lake Rotorua. Analyses of bioaccumulation in the tissues of macrobiota were undertaken in February ...