May 2016

ISBN 978-0-908324-33-0

PDF | 29 MB

The Clutha Delta has complex natural hazards that need to be considered to ensure proposed and existing activities are compatible with the hazard exposure and the residual risks posed by a range of natural hazards. This report looks at the different hazards, risks and fertility of the area.

June 2025

Graeme Smart, Arman Haddadchi

National Institute of Water & Atmospheric Research Lt

2025196CH

PDF | 4 MB

In this report NIWA has analysed historical changes in Balclutha river bed levels to help understand any significant trends and to guide river management strategies into the future.

March 2025

PDF | 6 MB

This assessment of the Clutha River / Mata-au looks at the shape of the river channel near Balclutha and how it has changed through time.

December 2022

Barrell DJA, Crundwell MP

GNS Science

Consultancy Report 2022/108

PDF | 8 MB

This report presents findings from a 2021 groundwater investigation on the Clutha delta. It explores the area's geological history, including sediment layers, radiocarbon dating, and past sea level changes, and highlights potential natural hazards such as earthquake-induced liquefaction. The study also assesses long-term land movement and its minor contribution to future sea level rise in the region.

July 2008

1-877265-59-4

PDF | 1 MB

Channel morphology and sedimentation in the Lower Clutha has previously been monitored using cross-section surveys at a limited number of sites from Beaumont bar downstream to the sea. Cross-section monitoring points are introduced here to extend the analysis of gravel resources upstream from Beaumont bar to Roxburgh dam. Although these are recent additions to the Otago Regional Council (ORC) cross-section monitoring program, previous surveys have been undertaken at many of these sites and this historical information has been collated and assessed in this report.

November 2005

Graeme Smart, Maurice Duncan, Jochen Bind

National Institute of Water & Atmospheric Research Ltd

PDF | 5 MB

This report describes flooding risks in the Lower Clutha Delta, showing the potential impact of large floods on the Balclutha township and other areas.

July 2021

Kate MacDonald

Jacobs New Zealand Limited

PDF | 8 MB

This report looks at Molyneux Bay – Clutha Delta coastal processes, historical and expected future shoreline changes, coastal inundation vulnerability and anticipated impacts of coastal hazards.

6 March 2025

PDF | 8 MB

Matters for consideration include updates on the Climate Resilience and Regional Infrastructure Fund (RiF) Tranche 1 programme, the Engineering renewals programme for year one of the 2024–2034 Long-term Plan (excluding government-funded projects), the Clutha Delta natural hazards adaptation programme, and the Otago Regional Council’s flood forecasting and public information services.

8 May 2024

PDF | 20 MB

The agenda includes updates on natural hazards adaptation work at the Head of Lake Whakatipu and the Clutha Delta, with progress reported on hazard assessments, engagement planning, and the findings of the Phase 1 Socio-economic Impact Assessment for Whakatipu. Councillors will also consider endorsing the Otago Regional Council Asset Management Plan 2024, which covers flood protection, land drainage, and river management infrastructure.

8 February 2024

PDF | 36 MB

The agenda covers updates on natural hazard adaptation for the Clutha Delta and Head of Lake Whakatipu, groundwater monitoring in South Dunedin, and the Lower Taieri flood risk assessment. It also includes a report on wildfire hazard and ORC’s delivery of civil defence responsibilities for the first half of 2023/24.

7 August 2024

PDF | 9 MB

The agenda covers updates on natural hazard adaptation for the Clutha Delta and Head of Lake Whakatipu, groundwater monitoring in South Dunedin, and the Lower Taieri flood risk assessment. It also includes a report on wildfire hazard and ORC’s delivery of civil defence responsibilities for the first half of 2023/24.

November 2023

PDF | 20 MB

The agenda includes updates on the Head of Lake Whakatipu natural hazards adaptation strategy, including recent modelling, peer review, and a funding application for nature-based solutions. Councillors will also receive updates on the Clutha Delta adaptation programme and developments in the use of MetService radar data to support ORC’s flood response.

8 December 2021

PDF | 11 MB

The agenda includes a report on coastal morphology and natural hazards at the Clutha Delta and Molyneux Bay, including findings from technical investigations and peer reviews. It also provides a public transport performance update for Queenstown and Dunedin for the first quarter of the 2021/22 financial year.