Whaitua te Whanganui-a-Tara technical reports

The Whaitua te Whanganui-a-Tara Committee is giving careful consideration to the views and knowledge of many different people in the community, whānau, industry, technical advisors, council officials and government agencies. The following information and independent expert advice are part of that collective knowledge.

Reports commissioned for the Whaitua te Whanganui-a-Tara Committee

An overview of the Wellington City, Hutt Valley and Wainuiomata Wastewater and Stormwater networks and considerations of scenarios that were assessed to improve water quality - James Blyth, Taylor Collaborations, June 2020

Overview of the Wellington metropolitan water supply network and consideration of future pressures on infrastructure - James Blyth, Taylor Collaborations, July 2020

Flow and Allocation Expert Panel Report: Ecological health impacts of different river water abstraction regime scenarios for the Te Awa Kairangi, Wainuiomata and Orongorongo - Mike Thompson et al.

Flow and Allocation Expert Panel Report: Executive Summary - Mike Thompson et al.

Whaitua Te Whanganui-a-Tara: Coastal habitat vulnerability and ecological condition - Salt Ecology, August 2018

Whaitua Te Whanganui-a-Tara: River and stream water quality and ecology - Aquanet Consulting Ltd., October 2018

Whaitua Te Whanganui-a-Tara: Summary of Septic Tanks and their potential impacts - James Blyth, Taylor Collaborations, October 2019

Ecological assessment of Parangarahu Lakes - Marc Shallenberg, Hydrosphere Research Ltd., November 2019

Te Whanganui-a-Tara Permitted Takes Water Assessment - Tom Nation, Taylor Collaborations, December 2019

dSedNet model development and results - Jacobs, February 2020

Contaminant Load Model development - Jacobs, February 2020

Proxy Modelling Catchment Assessment - James Blyth, 2020

Proxy Modelling Catchment Assessment - Addendum - James Blyth, 2020

A review of the effect of water abstractions on Wellington (public supply) Rivers - Joanne Clapcott, 2020

Wastewater network conditions and overflows by catchment - GWRC, August 2020

Reference reports

Climate change and variability - Wellington Region - NIWA, June 2017

The potential effects of climate change on flood frequency in the Hutt River - New Zealand Climate Change Research Institute Victoria University Wellington, October 2011

Owhiro Stream and its catchment: Summary of existing water quality and freshwater ecology information, Recommendations for future monitoring - Aquanet Consulting Ltd., 2019

Te Awarua-o-Porirua Collaborative Modelling Project Customisation of urban contaminant load model and estimation of contaminant loads from sources excluded from the core models - NIWA and Jacobs, March 2017

WSUD Case Study: Talbot Park - Activating WSUD Aotearoa, March 2019

WSUD Case Study: Kirimoko Park - Activating WSUD Aotearoa, March 2019

Assessing the Full Benefits of WSUD - Activating WSUD Aotearoa, April 2019

Effect of water sensitive urban design solutions and green space on property values: A literature review - Koru Environmental, September 2017

Summary of potential solutions available for stormwater, wastewater and water supply provision - Koru Environmental, May 2017

Stormwater contaminants in urban streams in the Wellington region - J R Milne and L Watts, GWRC, June 2008

The potential impacts of sediment from forest activities on water quality, biodiversity and ecosystem health of Gisborne streams and rivers - Russell Death, Massey University, December 2018

Urban Streams Water Quality State and Trends - NIWA, June 2016

Effects of flood protection activities on Aquatic and Riparian ecology in the Hutt River - MWH, December 2016

Proposed Natural Resources Plan: Decisions Version Schedules - GWRC, July 2019

Whaitua Catchments Climate Change parameters - from NIWA report, 2017

The Pakuratahi Land Use Study - Hawkes Bay Regional Council, June 2006

Porirua Whaitua Collaborative Modelling Project: Scenario Modelling Technical Report - Jacobs, March 2019

Porirua Whaitua Collaborative Modelling Project: Baseline Modelling Technical Report - Jacobs, March 2019

Ecological Assessment of Owhiro Stream and Tributary at T&T Landfill - Stantec, March 2017

Water Quality in New Zealand Rivers: Modelled Water Quality State - NIWA, March 2017

Nutrient concentration targets to achieve periphyton biomass objectives incorporating uncertainties - Tom Snelder, GNS Science, December 2018

Te Awarua-o-Porirua Collaborative Modelling Project - Urban Hydrology Modelling - Morphum Environmental Ltd., November 2018

Strategic assessment of New Zealand’s freshwaters for recreational use: a human health perspective: Escherichia coli in rivers and planktonic cyanobacteria in lakes - Cawthron and LWP, September 2016

Regional information for setting draft targets for swimmable lakes and rivers: A report on work underway to improve water quality in terms of effects on human health - Ministry for the Environment, March 2018

Technical report of Macroinvertebrate Community Index predictions for the Wellington region - Cawthron, May 2014

Benthic cyanobacteria blooms in rivers in the Wellington Region: Findings from a decade of monitoring and research - M Heath and S Greenfield, GWRC, June 2016

Technical report on developing a deposited sediment classification for New Zealand streams - Cawthron, March 2017

Te Awarua-o-Porirua information on fresh water current state and scenario results - Brent King, 2018

Review of Riparian Buffer Zone Effectiveness - NIWA, 2004

A guide for assessing effects of urbanisation on flow-related stream habitat - NIWA, 2004

Development of habitat suitability criteria and in-stream habitat assessment for the benthic cyanobateria phormidium - Heath et al, 2013

Hydraulic Habitat of Plants in Streams - Barry Biggs, 1996

Hydraulic Habitat Suitability for Periphyton - Biggs and Stokseth, 1996

Effects of Flood Protection Activities on Aquatic and Riparian Ecology in the Wainuiomata River - MWH, December 2016

Assessment of potential effects on instream habitat with reduced flows in the Hutt River at Kaitoke - Henry Hudson, October 2010

Groundwater Nitrate Trend Analysis Report - Tim Baker, GWRC, 2017

Mind the stream: A guide to looking after urban and rural streams in the Wellington region - GWRC

Ecological health of rivers and streams in the Wellington Region - Alton Perrie et all, July 2020