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June 2018The bottom-up modelling approach taken in this report sets out the pathways for the transition and how decision-making impacts economic activity and greenhouse gas emissions under uncertain future states of the world. Read more -
October 2019This report updates previously published data (2015) on coastal sea-surface temperature from 11 sites around New Zealand. Read more -
May 2019This report refines and updates 2011 modelling on suspended sediment loads across New Zealand with new and longer calibration datasets and updated predictors. Read more -
April 2019This report updates the state and trends of water quality of coastal and estuarine waters for physico-chemical (eg, pH), optical (eg clarity), nutrients (eg, nitrates), and microbiological parameters (eg, enterococci). Read more -
August 2018This guide explains how the New Zealand Emissions Trading Scheme (NZ ETS) is designed and how it operates (a snapshot as at August 2018). Read more -
September 2019This report from ESR describes the methodology and findings of an assessment of changes in levels of compliance with the Drinking-water Standards for New Zealand (DWSNZ) from 2005 to July 2017. Read more -
April 2018This report, prepared by consultancy Mōhio, examines climate finance in New Zealand. It includes a snapshot of key existing climate finance flows and a look at the instruments available to the Government and private sector such as grants, debt and bonds. Read more -
September 2018This report, prepared for the Ministry for the Environment by NIWA, examines the potential impacts of climate change on hydrological conditions at 20 river mouths around the country. Read more -
May 2019This report provides information on the susceptibility to eutrophication of coastal water bodies to nutrient loads from fresh water. Read more -
May 2019The Productivity Commission and the Ministry for the Environment contracted a consortium of organisations (‘CMV’) with experience in modelling and the economics of climate change mitigation to undertake modelling of New Zealand’s transition to a low-emissions economy. The modelling examines pathways from the present to the two 2050 emissions reduction targets. Read more -
March 2018The Ministry for the Environment commissioned Sapere to analyse the current information provision in the New Zealand Emissions Trading Scheme. The report offers recommendations on what, how and when information needs to be provided to the market to improve its efficiency. Read more -
October 2019This report updates indices for coastal and ocean extreme waves previously developed to quantify the occurrence of extreme wave events in New Zealand on an annual basis. Read more -
October 2019This report provides new coastal chlorophyll-a and sea-surface temperature analyses within New Zealand’s territorial waters. Read more -
April 2019This report summaries the published literature on land-use impacts on New Zealand's freshwater and coastal environments. Read more -
May 2018This report provides an environmental classification system for a potential deposited sediment indicator in the National Objectives Framework. The system classifies streams according to their modelled reference state. This report is an interim deliverable for an ongoing research programme that builds on and refines its findings and will conclude in June 2018. Read more -
September 2019This report reviews New Zealand literature on the effects of environmental degradation of freshwater ecosystems on social, cultural, environmental, and economic outcomes in New Zealand. Read more -
May 2019This report outlines recommended changes to the ‘Interim New Zealand Guidelines for Cyanobacteria in Recreational Fresh Waters’. Read more -
May 2019This report analyses seasonal patterns in river and lake water quality across New Zealand, using data from 2013–2017. Read more -
October 2019This report updates previously published statistics on mean sea-level series and trends at Auckland, Wellington, Lyttelton, Dunedin, New Plymouth and Moturiki (Mount Maunganui) to the end of 2018. Read more -
May 2019This report reviews how mechanistic (process-based) models simulate periphyton biomass using algorithms describing known growth and loss processes based on nutrients, light, temperature, grazing, and physical factors. Read more -
May 2019This report summarises a workshop held to gather feedback on the ‘Interim New Zealand Guidelines for Cyanobacteria in Recreational Fresh Waters’. Read more -
April 2019This report summarises analysis methods and outcomes for state and trends across New Zealand’s lake water quality monitoring network. Read more -
April 2019This report summarises analysis methods and outcomes for state and trends across New Zealand’s river water quality monitoring network. Read more -
May 2019This report analyses environmental conditions that cause the growth of periphyton in streams and rivers. Read more -
September 2019This draft NIWA report provides the first attempt to develop bottom-line thresholds for suspended and deposited sediment based on ecological responses for New Zealand rivers and streams. Read more -
June 2018The transition to a low-emissions economy will bring many costs and benefits. This report analyses the available evidence on the co-benefits (eg, health, congestion) of possible policies to reduce greenhouse gas emissions in New Zealand. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which investigated drivers of Phormidium blooms in New Zealand rivers to predict risk of blooms. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s river water quality. Read more -
April 2019This report summarises analysis methods and outcomes for modelling New Zealand’s lake water quality. Read more -
May 2019This report develops a model predicting the reference state for stream macroinvertebrates across New Zealand. Read more -
September 2019This data report provides an annual data picture of brassica grown in New Zealand. Read more -
May 2019This report provides information to help interpret trends in water quality of New Zealand’s lakes and rivers. Read more -
May 2019This report presents and tests a macroinvertebrate metric for New Zealand streams and rivers that is sensitive to changes in flow. Read more -
April 2019This report summarises analysis methods and outcomes for modelling nitrate-nitrogen leaching from livestock in New Zealand, from 1990 to 2017. Read more -
May 2019This report presents and tests a range of macroinvertebrate metrics for New Zealand streams and rivers that are sensitive to changes in sediment and periphyton. Read more -
October 2019This NIWA consultant report provides analysis of state and trends in a number of water quality variables in urban rivers and streams in New Zealand. Read more -
June 2018This report synthesises the series of economic analyses: modelling and other supporting economic studies, and their different strengths and weaknesses, to assess the economic impacts of target options and the wider impacts of stronger climate action. Read more -
June 2018This report by Sense Partners examines data and analyses on the ability of New Zealand businesses and sectors to innovate and compete in a world of uneven emissions prices. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
May 2018The Managing Upstream project aims to help inform management decisions when establishing freshwater objectives under the Freshwater NPS and increase knowledge on the state of different estuary types in New Zealand. Read more -
May 2018Phormidium is a potentially toxic, mat-forming benthic cyanobacterium found in an increasing number of New Zealand rivers. This report outlines a study which assessed Phormidium toxin levels in the Cardrona (Otago), Mataura (Southland) and Hutt (Wellington) Rivers in 2017. Read more -
December 2018Ministry for the Environment, in partnership with Bay of Plenty Regional Council, commissioned Perrin Ag Consultants Ltd and Manaaki Whenua Landcare Research to assess the farm/orchard-gate economic impact of applying a range of mitigation practices to reduce losses of nitrogen, phosphorus, E. coli and sediment. Read more -
June 2018In this report, the New Zealand Institute of Economic Research (NZIER) uses a dynamic Computable General Equilibrium (CGE) model to explore the economic impacts of transitioning to targets and a lower-emissions future, and examines how the economy changes in response to the imposition of various targets. Read more -
October 2019This report updates indicators for non-indigenous species with new data compiled since 2016. Read more -
September 2019As part of the Essential Freshwater programme, the Government is considering changes to nitrogen and phosphorus regulations. This study aimed to determine the impact of the proposed new nitrogen regulation. Read more -
November 2019This report by Concept Consulting compared input values used in the previous modelling of the EAF against reality. It found that if actual values had been used the EAF would be lower than its current level. Read more -
November 2019This report from Energy Link recommends a range of parameters and values for the proposed EAF modelling. Read more -
November 2019This report by Scientia Consulting estimates the actual EAF in the wholesale electricity market over 2016 and 2017 using actual and counterfactual (not NZ ETS costs) spot prices. Read more -
May 2019This report outlines the different potential approaches for characterising the pressure created by dams on the flow regime of rivers and streams. Read more -
September 2019This report builds upon the findings of the Sediment attributes and urban development (report 1) literature review - see link in Related publications below. Read more