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December 2020This report surveyed international frameworks, identified important lessons for outcome-based environmental management, and helps clarify what setting environmental limits and targets will require. Read more -
December 2020This report translates the planetary boundaries framework to show New Zealand’s global environmental connections and quantifies where our country sits in terms of operating within environmentally safe boundaries. Read more -
October 2020This report assesses the suitability of using New Zealand Rural Fire Authority’s Fire Danger Rating System as an indicator on wildfire risk for the Ministry for the Environment and Stats NZ’s environmental reporting. Read more -
October 2020This report describes the climate datasets that were supplied by NIWA for use in Our atmosphere and climate 2020, and outlines the methodologies used to generate them. Read more -
August 2020This report describes a prototype for a New Zealand River Ecosystem Health Scorecard, conceived as a simple, easily interpretable and holistic communication tool for the state of the biophysical condition of rivers and streams in New Zealand. Read more -
May 2020This report estimates the potential impact of the National Policy Statement for Freshwater Management (2017) and the Essential Freshwater package on the dairy, beef and sheep farming sectors. Read more -
May 2020This document provides a high-level overview of the impact assessment for Action for healthy waterways including the objectives and scope, findings, parties involved, methodologies applied, and the limitations and constraints to the analysis. Read more -
May 2020This report assesses the costs of the Essential Freshwater Package relative to the existing National Policy Statement for Freshwater Management. Read more -
May 2020This memo sets out a technical review by NIWA of two reports relating to environmental impact assessment of Essential Freshwater policies. Read more -
May 2020This report presents research conducted by Lincoln University on the willingness to pay for the various attributes associated with New Zealand’s green premium. Read more -
May 2020This report summarises work to evaluate load reductions required to meet the new National Policy Statement for Freshwater Management's nutrient-related bottom lines. Read more -
May 2020This memo assesses whether councils would need to make changes to wastewater treatment in addition to those already identified in the Boffa Miskell report Cost estimates for upgrading wastewater treatment plants to meet objectives of the NPS freshwater. Read more -
May 2020This is the second of two Infometrics reports providing Māori economic impact analysis for the Essential Freshwater proposals. Read more -
May 2020This is the first of two Infometrics reports providing Māori economic impact analysis for the Essential Freshwater proposals. Read more -
May 2020This report uses a kaupapa Māori framework to assess the impacts of the 2019 freshwater proposals on Māori values relating to freshwater Read more -
May 2020This AgResearch report presents insights on the potential nature of social impacts emerging from freshwater policy changes based on past social impact assessments (SIAs). Read more -
May 2020A literature review of studies that jointly considered climate and freshwater policy in New Zealand. Read more -
May 2020This NIWA report summarises existing literature on the consequences of delaying reductions to nutrient inputs on rivers, estuaries and lakes. Read more -
May 2020This report builds on the report released by the Freshwater Science and Technical Advisory Group in June 2019. Read more -
May 2020This report identifies the expected benefits of the Essential Freshwater Package and examines whether they can be measured in monetary terms. Read more -
May 2020This Castalia report estimates the administrative costs imposed under the Action for healthy waterways package for New Zealand’s 16 regional councils. Read more -
May 2020This report by Perrin Ag estimates the on-farm economic impact of a selection of measures to mitigate the effect of farming on freshwater ecosystem health. Read more -
May 2020This report scopes the potential development of a land-use intensity indicator for environmental reporting. Read more -
May 2020This report presents the modelled results of the impact of the National Policy Statement for Freshwater Management (2017) and two variants of the Essential Freshwater package on New Zealand’s economy in 2030 and 2050. Read more -
Further analyses of fine sediment attributes to support development of the NPS freshwater managementMay 2020These six technical reports detail analysis used to finalise the suspended and deposited sediment attributes for the National Policy Statement for Freshwater Management. Read more -
May 2020This report by the Freshwater Independent Advisory Panel makes a series of recommendations about the proposals outlined in the Action plan for healthy waterways consultation document. Read more -
April 2020This report by Cawthron collates and analyses regional council river and stream monitoring data, including measures of fine deposited sediment and habitat quality. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. It produces neurotoxins called anatoxins and ingestion of cyanobacteria mats has caused numerous dog deaths. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
March 2020Phormidium (now called Microcoleus) is a cyanobacterium (toxic algae) that grows in some New Zealand rivers. Read more -
November 2019This report prepared by 4Sight Consulting and Market Economics is intended to test the proposed National Policy Statement for Indigenous Biodiversity (NPSIB) before public consultation and help inform stakeholders on the likely impacts, benefits and costs of the NPSIB. 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 -
October 2019This report updates previously published data (2015) on coastal sea-surface temperature from 11 sites around New Zealand. Read more -
October 2019This report updates indicators for non-indigenous species with new data compiled since 2016. 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 -
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 -
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 -
September 2019This report describes hydrological modelling that estimates the suspended sediment load reductions required to meet proposed suspended sediment attribute bottom lines. Read more -
September 2019This report provides a cost-benefit assessment of potential interventions to meet proposed suspended sediment attribute bottom lines. Read more -
September 2019This literature review assesses the primary sources of variability in sediment generation in an urban environment and the impact of urban development on sediment discharges in the short and long term. 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 -
September 2019This report analyses water quality data to assess the effect of urban development on in-stream indicators of suspended fine sediment, primarily turbidity and total suspsended sediment. Read more -
September 2019This report describes modelling of several urban development scenarios and their variable effect on sediment yield during construction. Read more -
September 2019This report describes remote sensing imagery analysis that identifies areas of winter forage cropping and evaluates devegetation that results from winter grazing. 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 -
September 2019This report provides a review of alternative, and potentially complementary, frameworks for the integrated assessment of the economic, environmental, and socio-cultural effects of environmental management. Read more -
September 2019This report sets out an economic analysis of modelled assessments of four potential options for managing the effects of farming on freshwater. Read more -
September 2019This report sets out the results of a modelling exercise that assessed the potential economic impacts of meeting a range of contaminant loads and attributes states for nitrogen, phosphorus, and sediment in the Ruamahanga catchment in Wairarapa. 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