Here you will find the complete list of case studies in the directory

 

Mainly New Zealand relevant case studies have been provided for DSS's where available. 

The case studies provide summary information about the use of the DSS around the following framework:

- Reason for using DSS (the underlying science/policy question being investigated)

- Overview of implementation of the DSS

- Outputs and findings

- Any recommendations or lessons learnt

Links are provided to more comprehensive case study documents or further examples if available.

 

Do you know of other Case Studies that could be added to this directory?

If so please go to the Suggestion Box and submit your ideas to the administrator.

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    ABM - Spatial Multi-Agent Simultation of Nitrogen Discharge Trading

    Nutrient discharge - nitrogen (N) leached from intensive farming is a major cause of poor water quality of rivers and lakes in catchments.

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    AquiferSim - Mataura Valley, Southland

    This case study outlines a pilot AquiferSim case study that was set up for the mid-Mataura Basin (Southland).

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    BBN - Rural Land Use and Streams - Bog Burn, Southland

    Maintaining key values in streams and rivers in areas of intensive dairy farming often requires concerted action based on a shared understanding of the links between waterway values, farm practices and stressor mitigations.

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    CALPUFF - Sulphur dioxide ambient modelling

    This paper summarises a study carried out for Carter Holt Harvey at Kinleith Pulp and Paper Mill (Tokoroa, New Zealand) which compared two different types of atmospheric dispersion model with actual ambient monitoring data for SO2.  One of these models is CALPUFF.                       

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    CBA - Warm Up New Zealand: Heat Smart Programme

    This report summarises the results of an analysis of the costs and benefits of the Warm Up New Zealand: Heat Smart programme.

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    CLUES - Mataura River, Southland

    Environment Southland contracted NIWA to simulate the effects of land use change and farm mitigation practices on water quality (loads and concentrations of total nitrogen (TN) and total phosphorous (TP) for the Mataura River catchment (5350 km2) using the CLUES 3.0 model.

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    CLUES - The Waikato Catchment

    CLUES was used to assess the changes in the nitrate loads for the Waikato catchment under two scenarios.

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    DYRESM-CAEDYM - Ohau Channel diversion, Lake Rotoiti

    This case study outlines some of the work undertaken by NIWA and the University of Waikato to investigate a partial or complete diversion of the Ohau Channel (which flows between Lake Rotorua and Lake Rotoiti in the central north island, New Zealand) towards the Kaituna River.

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    GLEAMS - Waiarohia Catchment

    NIWA were commissioned by Auckland Regional Council (ARC), North Shore City Council, Rodney District Council, Waitakere City Council, and Transit NZ to: 1) predict the impact of proposed rural residential developments upon sediment loss in the Waiarohia catchment, and to determine whether the proposed earthworks are to result in a significant change in sediment load compared with the existing land use.

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    HEL - Manawatu Whanganui Region

    The February 2004 storm that struck the Manawatu, Rangitikei, Wanganui and Tararua Districts caused erosion in hill country, and flooding, sedimentation and stream course changes in the lowlands.  Unsustainable land use of hill country was a major factor contributing to this damage and is now one of four major issues...

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    IDEAS - ICM Motueka Catchment

    The ICM Motueka Research Programme was a 9 year programme which commenced in July 2000 and concluded in September 2010, and whose goal was to conduct multi-disciplinary, multi-stakeholder research to provide information and knowledge that will improve the management of land, freshwater, and near-coastal environments in catchments with multiple, interacting, and potentially conflicting land uses.  The Motueka River has been used for this project.

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    IFS - Manawatu

    The IFS model is a scoping model constructed from a Mediated Modelling (MM) process which extended over 3 workshop days with 16-18 participants from Horizons Regional Council, Fonterra, Federated Farmers, Fish and Game, Forest and Bird, Department of Conservation, Horowhenua District Council Tarenuiarangi Manawatu Incorporated, Palmerston North City Council,  Water & Environmental Care Assn Inc and Manawatu Estuary Trust, Te Kauru (Eastern Hapu Collective Rangitane), Muaupoko Tribal Authority, Te Kauwhata and Vision Manawatu.

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    LURNZ - Spatial and temporal responses to an emissions trading system covering agriculture and forestry: simulation results from New Zealand

    We perform simulations using the integrated Land Use in Rural New Zealand (LURNZ) model to analyse the effect of various New Zealand emissions trading scheme (ETS) scenarios on land-use, emissions, and output in a temporally and spatially explicit manner.

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    MM - Wellington Regional Model

    The Wellington Region Mediated Modelling (MM) provided an opportunity for 9 - 15 representative stakeholders to come together over a period of three workshops (April, May, October 2011) to interactively build a scoping model to link social, cultural, economic and environmental issues in one framework.

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    NManager - Does complex hydrology require complex water policy?

    The work contained in this case study examines six different approaches to nutrient management, and simulates the economic costs and environmental impacts associated with them using NManager.  The work is focused on Lake Rotorua in the Bay of Plenty in New Zealand, where the regional council is concerned with the decline in the lake's water quality and has set a goal to restore the lake to its condition during the 1960s.

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    NZeem - Erosion carbon study

    In this paper, erosion models (including NZeem) are used to estimate the net carbon transfer between the atmosphere and soils due to erosion in New Zealand.

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    NZFARM - Nutrient Reduction Policy in Hurunui Catchment, North Canterbury

    This paper uses an economic catchment model, NZ-FARM, to assess changes in land use, enterprise distribution, nutrient loading levels and Green House Gas emissions from a series of policies that introduce nutrient reduction caps on land-based production in Hurunui plains region of North Canterbury.  

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    RiVAS - Valuing Our Waters, Tasman District

    This case study, part of a wider research project called Freshwater Values, Monitoring and Outcomes, had three main objectives -  

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    ROTAN - Nitrogen Loads to Lake Rotorua

    This report details a third piece of work in a series prepared for Bay of Plenty Regional Council.  It outlines recent refinements made to the ROTAN model and describes several scenarios of land use change and mitigation.  Findings are intended to help managers develop policy by estimating the extent of export reduction required to meet the lake target of 435 tN/yr and how quickly the load to the lake is likely to respond to such reductions.  The results will be used by the University of Waikato to predict likely changes in lake water quality.

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    Scenarios - Four NZ Futures

    The four scenarios are presented in this work are summarised below.

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    SPASMO - Groundwater Nitrate Contamination after Closure of a Feedlot.

    Nitrate contamination of groundwater by a sheep feedlot in Hawke's Bay, New Zealand led to closure of the feedlot in 1998.

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    SPASMO - Measuring and Modeling the Stress Response of Grapevines to Soil-Water Deficits

    A series of lysimeter and field experiments, complemented by modeling at the leaf, whole plant, and vineyard scale, are used to understand transpiration losses from grapevines and to determine the onset and impact of water stress.

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    SPASMO - Root-water uptake by kiwifruit vines following partial wetting of the rootzone

    Rates of sap flow and root-water uptake by two 7-year old kiwifruit vines an orchard with the aim of determining the ability of the vines to alter their spatial pattern of root-water uptake following differential wetting of the root zone.

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    SSYE - Estimation of suspended-sediment yields from New Zealand’s rivers and streams

    The Suspended-Sediment Yield Estimator was used to estimate the suspended-sediment yields from New Zealand’s rivers and streams. Predicting long-term average suspended-sediment loads in rivers and streams is useful for dealing with a variety of issues.

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    SSYE - The investigation of the transmission gully motor way project

    During the construction of the Transmission Gully, the earthworks will generate additional sediment, which has the potential to cause adverse effects in the freshwater and marine receiving environments.

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    SWAT - Motueka River Watershed

    The impacts of land cover in critical water resources in the Motueka River catchment was modelled using SWAT as part of an Integrated Catchment Management (ICM) project.

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    TEC - Recent loss of indigenous cover in New Zealand

    Recently developed national spatial databases enable improved estimates of how much of the full range of New Zealand’s terrestrial biodiversity pattern remains, its rates of change, and how much is legally protected.

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    TEC - West Coast Region, New Zealand

    The objectives was to identify the status of the LENZ environments of the West Coast Regional Council area in terms of the Threatened Environment Classification (TEC), and to quantify the degree of indigenous cover remaining in the West Coast Region; and Buller, Grey and Westland Districts.

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    Topnet - National Water Accounts

    The National Institute of Water and Atmospheric Research has been commissioned by the Statistics New Zealand to estimate eleven components of the national and regional water balance of New Zealand for each of the sixteen years from 1 July 1994 to 30 June 2010.

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    WAIORA - Instream Flow Assessment, Horizons RC

    This report addresses options available to Horizons Regional Council for setting defensible minimum flows for rivers in its jurisdiction.  Horizons is currently considering water allocationoptions for the various water management zones within its region, and an appropriate minimum flow is recognised as a key part of the water allocation framework.  However, minimum flow setting is often subject to much debate in policy and resource consent decision making.  At present Horizons have minimum flows set in regional plans for some of its rivers, but aims to incorporate specified minimum flows in the new regional plan (“The One Plan”) to enable debate around minimum flows to occur at the policy level, as opposed to a consent-by-consent basis.

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    WISE - Urban Growth

    This case study applies Waikato Integrated Scenario Explorer (WISE) to explore urban sprawl scenarios for the Future Proof project centred on Hamilton and surrounding districts.