Ruamāhanga Water Quality

Information provided by experts on the Ruamāhanga's water quality. 

The following information on water quality in the region helps the Committee understand the catchment better:

• Summary of Ruamāhanga whaitua draft freshwater objectives for rivers and lakes - Valid 18 May 2018 (Table)
  

• Sediment limits and targets - Valid 18 May 2018 (Table)
  

• Diffuse source nutrient limits and targets (un-attenuated) - Valid 18 May 2018 (Table)
  

• Point source discharges - current and target allocations - Valid 18 May 2018 (Table)
  

• Instream nutrient concentrations and exceedance criteria for periphyton objectives - Valid 18 May 2018 (Table)

• Draft sediment and nutrient limits - Valid 30 April 2018 (Table)
  

• Sediment management options for the ruamahanga whaitua- 9 April 2018 (Presentation)

• Sediment management options for the ruamahanga whaitua- 9 April 2018 (Report)

• What mitigations are driving reductions in sediment - 26 March 2018 (Report)

• DRAFT Ruamahanga sediment load data for RWC workshop - 26 March 2018 (Report)
  

• Refresher on attributes, drivers and solutions - 4 December 2017 (Presentation)

• Summary sheet of draft freshwater objectives - lakes - Valid up until 4 December 2017 (Table)

• Summary sheet of draft freshwater objectives - rivers - Valid up until 4 December 2017 (Table)
  

• Summary worksheet for nitrate toxicity and ammonia toxicity - 27 November 2017 (Table)

• Fact sheet - Nitrate nitrogen modelling outputs - 27 November 2017 (Report)
  

• Fact sheet - Ammoniacal nitrogen modelling outputs - 27 November 2017 (Report)
  

• Dissolved reactive phosphorus (DRP) and suspended sediment concentration (SSC) modelling outputs presentation - 27 November 2017 (Presentation)
  

• Ecological health summary report of modelling outputs by Jacobs - 27 November 2017 (Report)
  

• Fact sheets for first 10 sites for DIN - 27 November 2017 (Fact sheet)
  

• Fact sheet for remaining 10 sites for DIN - 27 November 2017 (Fact sheet)

• DRP and SSC modelling in the Ruamāhanga whaitua - 13 November 2017 (Presentation)
  

• Fact sheets for first 10 sites for DRP - 13 November 2017 (Fact sheet)
  

• Fact sheets for remaining 10 sites for DRP - 13 November 2017 (Fact sheet)
  

• Map of DRP modelling outputs - 13 November 2017 (Map)
  

• Fact sheets for first 10 sites for SSC - 13 November 2017 (Fact sheet)
  

• Fact sheets for remaining 10 sites for SSC - 13 November 2017 (Fact sheet)
  

• Map of SSC modelling outputs - 13 November 2017 (Map)
  

• Updated draft values and objectives cascade - 6 November 2017 (Table)

• Human health E.coli summary presentation of modelling outputs by Jacobs - 24 October 2017 (Presentation)
  

• Human health E.coli summary report of modelling outputs by Jacobs - 24 October 2017 (Report)
  

• Example of worksheet used by the Ruamāhanga Whaitua Committee to develop freshwater objectives for E.coli - 24 October 2017 (Table)
  

• E.coli bench marking material for major rivers - 24 October 2017 (Table)
  

• E.coli bench marking and scenario summaries for major rivers - 24 October 2017 (Table)
  

• Rivers and lakes in the Wellington Region - MfE swimmability map - 24 October 2017 (Map)
  

• Map of e-coli modelling results - simulated swimming category changes - 24 October 2017 (Map)
  

• Map of e-coli modelling results - 50th percentile - 24 October 2017 (Map)

• Material from engagement with community to help development of freshwater objectives for human health - 24 October 2017 (Report)

• Draft values and objectives cascade - Te Mana o Ruamāhanga - 24 October 2017 (Table)
  

• Ruamāhanga Whaitua Committee approach to managing discharges - July 2017 (Report)
  

• Potential direction for management of discharges - 3 April 2017 (Report)
  

• Examining options for allocating discharge limits in the Ruamahanga - 3 April 2017 (Report)
  

• Allocation of diffuse nitrogen discharges - 3 April 2017 (Report)
  

• Farm scale planning by Richard Parkes - 3 April 2017 (Presentation)

• Landing on management options - 27 March 2017 (Presentation)
  

• Policy framework - 13 March 2017 (Presentation)
  

• Examining options for allocating discharge limits in the Ruamāhanga - 13 February 2017(Report)

• Nutrient load modelling in the Ruamāhanga by John Bright, 26 July 2016 (Presentation)

• Nutrient load modelling in the Ruamāhanga by John Bright - 26 July 2016  (Presentation)

• Nutrient load mapping by John Bright - 11 May 2016  (Presentation)

• Draft Surface hydrology in the Upper Ruamāhanga watershed by Christian Zammitt - 11 May 2016 (Presentation)

• Hydrological model for Ruamāhanga, by Christian Zammit  - 11 May 2016(Presentation)

• Surface water quality modelling E.coli and sediment  by Michelle Sands - 11 May 2016(Draft summary report)

• E. coli and sediment by Michelle Sands - 11 May 2016(Presentation)

• Gaps and management options for nutrients and sediment by Murray McLea - 7 March 2016(Report)

• Pathogen management in the Ruamāhanga catchment by Murray McLea - 7 March 2016(Report)

• Managing pathogens – 7 March 2016(Presentation)

• Current management of nutrients and sediment – 9 February 2016(Presentation)

• Wellington Regional Council policy approaches for managing sediment in the Ruamāhanga catchment by Andrew Stewart and Murray McLea - 9 February 2016(Report)

• Nutrient management in the Ruamāhanga catchment by Murray McLea and Richard Parks - 26 January 2016(Report) 

• Ruamāhanga waterways - comparison with National Policy Statement for Freshwater Management Attributes- 16 March 2015 (Map)

• Ruamāhanga waterways - comparison with National Policy Statement for Freshwater Management Attributes - 16 March 2015 (Report)

• River water quality and ecological health in the Ruamāhanga Whaitua by Tessa Bunny et al - 4 August 2014(Report)

• River and stream water quality and ecological health by Tessa Bunny et al - 4 August 2014(Presentation)

• Land use and water quality by Andrew Stewart - 16 June 2014(Report)

• Land use in the Ruamāhanga Whaitua by Andrew Stewart - 16 June 2014(Presentation)

• Mangatarere Stream Catchment Water Quality Investigation by J Milne et al - July 2010(Background Information)