Cardrona Plan Change - Technical Reports


Technical Report: Update of scientific information for the Cardrona catchment: 2011-2017, ORC, 2017

This report will provide an overview of the results of the work undertaken since 2011 and discusses the implications for the minimum flow process in the Cardrona River catchment. This information will include the following:

  • hydrology and existing water allocation in the Cardrona River,
  • aquatic instream values of the Cardrona River,
  • presentation, analysis and interpretation of the results of instream flow and habitat modelling to maintain aquatic ecological values in the Cardrona River.

This report will supersede the findings of the surface water section in the report: “Integrated Water Resource Management for the Cardrona River” (2011).


Technical Report: Wanaka Groundwater Model, Pattle Delamore Partners 2018

This report details the results of a groundwater model developed by Pattle Delamore Partners that simulates the effect of groundwater abstraction on surface water flows in the Lower Crdrona River and Bullock Creek. Specific objectives of the study included:

  • Estimate the effects of groundwater abstraction on baseflows in the lower part of the Cardrona River and in Bullock Creek;
  • Consider the effect of additional groundwater abstraction on groundwater levels and existing groundwater users;
  • Consider potential allocation options across the Wanaka Basin.

This report will supersede the findings of the ground water section in the report: “Integrated Water Resource Management for the Cardrona River” (2011).


Technical Report: Cultural values report Arrow River / Wakatipu Basin Aquifers & Cardrona River, Aukaha (previously KTKO Ltd), 2017

The Cardrona catchment is highly valued by Kāi Tahu. Trails ran through the catchment, bringing whānau into the southern lakes and rivers. Today the river is used for recreation, and is valued for its landscape qualities and as a habitat for aquatic species. It is a treasured place where whānau have grown up and spent time together. Whānau want to see tuna (longfin eel) re-established, and are particularly concerned about the wellbeing of the Upper Clutha non-migratory galaxids. This report outlines these and other values.


Technical Report: Water Quality Study: Cardrona River Catchment, ORC, 2016

This report summarises the results of a targeted monitoring investigation into the water quality of the Cardrona River. The study assesses the following:

  • spatial and temporal patterns in water quality in order to assess the effects of land use on water quality in the Cardrona catchment,
  • water quality in the Cardrona catchment against water quality standards in the Water Plan Change;
  • habitat quality and macroinvertebrate communities in the Cardrona catchment.


Technical Report: Integrated Resource Management for the Cardrona River, ORC, 2011

This ORC report from 2011 draws together historical surface and groundwater information, along with a series of low flow gauging and an assessment of instream values reported at the time.

This report has been superseded by the following two reports:

  • Technical Report: Update of scientific information for the Cardrona catchment: 2011-2017” ” (2017).
  • ”Wanaka Groundwater Model, 2018


Pre-feasibility assessment Managed Aquifer Recharge Wanaka Cardrona, Golder Associates, 2015

This report by Golder Associates discusses the findings from a pre-feasibility assessment on artificial replenishment of groundwater in the Wanaka Basin Cardrona Gravel Aquifer with water taken from the Cardrona River during late-winter and spring. The purpose of the work was to help the community and stakeholders understand the range of options available for water management in the lower Cardrona Valley.


On-farm Storage Pre-feasibility Assessment Cardrona Valley and Wanaka-Cardrona Flats, GeoSolve & David Hamilton, 2017

This report by GeoSolve Ltd and David Hamilton & Associates Ltd summarises the findings of pre-feasibility assessment of on-farm water storage options in the Cardrona Valley and the Wanaka-Cardrona Flats. The objective of this pre-feasibility assessment was to provide concept level identification and assessment of potential water storage sites within the study area, including indicative estimates of storage volumes & costs. The study will assist with identifying and assessing the economic effects of water take restrictions on irrigators and other water users.


Natural hazards in the Cardrona Valley, summary report, ORC, 2010

Natural hazards in the Cardrona Valley, ORC, 2010

The Cardrona Valley and its environment have a complex hazard setting. The residents and wider community are exposed to a range of hazards, including flood inundation, sedimentation and erosion, seismic hazards, mass movement, and alluvial fan hazards. The level of exposure is defined by the nature, magnitude, and frequency of these hazards. This document identifies and describes each hazard, while discussing the effects they may have on residents and community.


Channel morphology and sedimentation in the Cardrona River, ORC, 2010

Channel Morphology and Sedimentation, Summary Report, ORC, 2010

This study explores how the morphology and sedimentation of the Cardrona River has changed over the surveyed periods, as well as providing a synthesis of the study’s results to guide river management into the future.


Cardrona River Channel Morphology, ORC, 2016

This study provides an update on changes in channel morphology that have occurred since the last catchment-wide analysis of long-term trends in 2010. The report is designed to inform decisions relating to the management of the Cardrona River and its margins, including gravel extraction, floodwater conveyance, and asset management.

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