Investigations, reports and presentations

View all the reports for the Head of the Lake Adaptation programme, as well as climate change reports and council updates.

If you have any questions about the reports and the adaptation project, please get in touch with us.

If you want to participate in the adaptation project:

 

Liquefaction and lateral spreading hazard management report

A new assessment by Tonkin + Taylor Ltd focusses on possible engineered hazard mitigation or management approaches for liquefaction and lateral spreading. Like the Damwatch Report published last year, it identifies a range of potential hazard management interventions, and reviews the key benefits and constraints of those approaches.

Tonkin + Taylor report

Tonkin + Taylor presentation material - Safety and Resilience Meeting 10 May 2023

 

Tonkin + Taylor presentation to the Safety and Resilience Meeting 10 May 2023

 

Floodplain hazard management report

ORC also completed a study to better understand adapt to or manage floodplain hazards such as flooding and erosion.

The report by Damwatch Engineering Ltd focuses on management of three areas where floodplain hazards - flooding or erosion – may impact on the community or infrastructure in the head of Lake Wakatipu area;

  1. The lower Rees River and Glenorchy township
  2. The Dart floodplain and Kinloch access
  3. The Rees floodplain and the Rees bridge

The report identifies a range of potential hazard management interventions, and reviews the key benefits and constraints of those approaches. 

Damwatch Engineering Report

 

June 2022 reports

Two investigations were delivered to the community in June, and include a geotechnical investigation, by Tonkin + Taylor Ltd, looking at liquefaction and lateral spreading caused by a major earthquake. The second, by Land River Sea Consulting Ltd, assessed the flood hazard from the floodplain, Dart and Rees Rivers, and high levels in Lake Wakatipu.

The reports are now available below.

You can also read a much shorter summary of both the reports (containing a number of images).

View the liquefaction report

View the flood hazard report here

View a summary of both reports here

 

Natural hazard reports

Shepherds Hut creek debris flow hazard – September 2022

Cultural Values Statement for Dart-Rees area - January 2021

Head of Lake Wakatipu – Natural hazards assessment March 2021

Channel morphology of the Rees River, Otago – September 2013

Natural hazards at Glenorchy – May 2010

Natural hazards at Glenorchy (summary report) – May 2010

Glenorchy area geomorphology and geo-hazard assessment – September 2007

Glenorchy Rees Floodbank assessment - September 2020

Rees River erosion and floodbank inspection - June 2020

Climate change reports

Otago Climate Change Risk Assessment – March 2021

Otago region climate change projections report 2019

 

Council updates

Head of Lake Wakatipu Updates presented to the Data and Information Committee – June 2022

Updates presented to the Council - May 2021

 

Presentations and other resources

Community presentations, video, and links

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