Ruamāhanga Technical Reports

The Ruamāhanga Whaitua Committee is considering many strands of knowledge. The following information and independent expert advice are part of that collective knowledge.

Please note, the technical reports below are pending third party review.

• Ruamāhanga catchment - Assessment of background instream nutrient yields - October 2018 - Prepared for GWRC by Jacobs
  

• Ruamāhanga catchment modelling - Water quality freshwater objectives and load setting - August 2018 - Prepared for GWRC by Jacobs
  

• Comment on the minimum flow setting in the Ruamāhanga Whaitua - June 2018 - Prepared by Mike Thompson, GWRC
  

• Example scenario calculation - using NO3-N - May 2018 - Table example prepared by Jacobs (Links with report titled 'Ruamāhanga Catchment Modelling - Water quality freshwater objectives and load setting' by Jacobs)
  

• Setting nutrient criteria to achieve desired community periphyton biomass attribute states at Ruamāhanga reporting sites - January 2018- Prepared by Mark Heath, Environmental Science department, GWRC
  

• A coupled hydrodynamic-ecological model to test management options for restoration of lakes Onoke and Wairarapa - April 2018- Prepared for GWRC by Environmental Research Institute University of Waikato

• Water quality modelling of the Ruamāhanga catchment - Baseline and calibration - April 2018 - Prepared for GWRC by Jacobs
  

• Water quality modelling in the Ruamāhanga catchment - Scenario modelling - May 2018 - Prepared for GWRC by Jacobs
  

• Economic assessment of scenarios for Ruamāhanga Whaitua Collaborative Modelling Project - April 2018 - Prepared for GWRC by Landcare Research

• Wairarapa Flow Regimes - Economic impact assessment of draft Plan changes - Link to report prepared in July 2015 for GWRC by LWP as part of the draft Natural Resources Plan process

• Wairarapa Flow Regimes - Economic impact assessment of proposed Plan changes - Link to report prepared in April 2017 for GWRC by LWP as part of the proposed Natural Resources Plan process

• Ruamāhanga Social Assessment Report - December 2017 - Prepared for GWRC by Nick Taylor and Associates

• Minimum flow and allocation options for the Ruamāhanga River and major tributaries - April 2018 - Prepared by Mike Thompson, Environmental Science Department, GWRC

• Farm-Scale Modelling Report Ruamāhanga Whaitua Collaborative Modelling project - July 2016 - Prepared for Ministry of Primary Industries by T Parminter & J Grinter

• Supplement to the Farm-Scale Modelling Report - December 2016 - Prepared for GWRC by T Parminter

• Modelling Farm-Scale Mitigation Options for the Ruamāhanga Whaitua Collaborative Modelling Project - June 2016 - Prepared for Ministry of Primary Industries by R Muirhead, Ag Research 

• Nutrient Load Mapping Methodology - November 2016- Prepared for GWRC by J Bright, Aqualinc 

• Impact of Climate Change on Inflows to the Ruamāhanga Groundwater Management Zone - February 2017 - Prepared for GWRC by Christian Zammit, NIWA

• Surface Hydrology in the Ruamāhanga Hill Country Catchment - May 2017 - Prepared for GWRC by Christian Zammit, NIWA

• Managed Aquifer Recharge: Exploration Scenario Modelling - July 2017 - Prepared for GWRC by Mark Gyopari, Earth in Mind

• Groundwater Recharge and Irrigation Demand Modelling Ruamāhanga Collaborative Modelling Project - December 2017- Prepared for GWRC by J Bright, J Weir, & A Dark, Aqualinc

• Ruamāhanga Catchment Groundwater Modelling - October 2017 - Prepared for GWRC by C Moore, M Gyopari, M Toes, & D Mzila, GNS

• Results of Ruamāhanga Groundwater Flow and Transport Modelling for the Ruamāhanga Whaitua Committee: Business as Usual, Silver and Gold Scenarios - November 2017  - Prepared for GWRC by ZI Rawlinson, C Moore, M Gyopari, & M Toes, GNS

• Effects of Land and Water Management on Ecological Aspects of Major Rivers - September 2017 - Prepared for GWRC by R Storey, S Wood, M Hicks, & A Perrie, NIWA