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Integrated Flood and Ecological Infrastructure for Christchurch River Corridor
Jacobs, GHD and Boffa Miskell collaborate with Christchurch City Council to design flood protection, stormwater infrastructure and ecological restoration along the Ōtākaro Avon River Corridor.
www.jacobs.com
Jacobs, in cooperation with GHD and Boffa Miskell, has been appointed by Christchurch City Council to develop the scheme design for stormwater and park infrastructure within the Ōtākaro Avon River Corridor (OARC) regeneration programme in Christchurch, New Zealand. The project integrates flood management, ecological restoration and public landscape design to create a long-term resilient river corridor following the land damage caused by the 2010–2011 Canterbury earthquakes.
Context of the Cooperation
The earthquakes significantly altered ground stability and drainage conditions in Christchurch’s eastern suburbs. Approximately 602 hectares along the Ōtākaro Avon River were declared a Residential Red Zone due to land subsidence and infrastructure failure. The New Zealand Government and Christchurch City Council subsequently developed the OARC Regeneration Plan to transform the area into an ecology-led river corridor that combines environmental restoration with flood protection and public space.
Delivering this transformation requires multidisciplinary expertise covering hydrology, geotechnical engineering, landscape architecture and environmental planning. Jacobs leads the scheme design process, while engineering consultancy GHD and environmental planning and landscape design firm Boffa Miskell provide complementary technical capabilities.
Technical Solution and Responsibilities
The cooperation focuses on designing an integrated digital infrastructure and water management framework for the corridor. Jacobs is responsible for the core engineering design, including flood defence systems, stormwater management areas and associated hydraulic infrastructure.
Key components of the technical solution include:
- Flood protection structures along vulnerable river sections
- Constructed wetlands and stormwater treatment zones to improve water quality
- Pump stations equipped with mechanical and electrical systems for controlled water transfer
- Surface drainage systems designed to manage extreme rainfall events
- Ecological habitat restoration integrated with park infrastructure
GHD contributes civil engineering and technical design support, particularly in water and environmental engineering disciplines. Boffa Miskell provides landscape architecture, ecological planning and environmental integration to ensure the corridor design supports biodiversity and public use.
The combined design framework incorporates hydrological modelling, geotechnical assessment and digital simulation tools to evaluate flood scenarios and long-term water management performance.
Deployment and Implementation
The scheme design phase establishes a technical pathway for the corridor’s staged development. It defines preliminary infrastructure layouts, evaluates engineering risks and provides cost frameworks to guide future project phases.
Infrastructure components will be integrated with existing Christchurch drainage systems while supporting long-term flood resilience for surrounding suburbs. Digital modelling supports the evaluation of stormwater flow patterns and hydraulic capacity across the river corridor.
The design also establishes engineering standards and planning parameters for infrastructure expected to operate over a 100-year flood management horizon.
Applications and Use Cases
The project demonstrates how sustainable urban water management can be combined with public landscape infrastructure. Key technical use cases include:
The combined design framework incorporates hydrological modelling, geotechnical assessment and digital simulation tools to evaluate flood scenarios and long-term water management performance.
Deployment and Implementation
The scheme design phase establishes a technical pathway for the corridor’s staged development. It defines preliminary infrastructure layouts, evaluates engineering risks and provides cost frameworks to guide future project phases.
Infrastructure components will be integrated with existing Christchurch drainage systems while supporting long-term flood resilience for surrounding suburbs. Digital modelling supports the evaluation of stormwater flow patterns and hydraulic capacity across the river corridor.
The design also establishes engineering standards and planning parameters for infrastructure expected to operate over a 100-year flood management horizon.
Applications and Use Cases
The project demonstrates how sustainable urban water management can be combined with public landscape infrastructure. Key technical use cases include:
- Large-scale stormwater treatment using constructed wetlands
- Flood mitigation through controlled drainage and retention areas
- Integration of ecological restoration with urban park systems
- Infrastructure planning for climate-resilient river corridors
Expected Impact
By combining flood protection, ecological restoration and stormwater management within a single river corridor system, the design approach aims to reduce flood risk in surrounding suburbs while improving water quality and restoring natural habitats.
The scheme design also establishes a long-term framework for maintaining hydraulic stability and environmental performance across the corridor while enabling public access, recreation and community use of the regenerated landscape.
Edited by an industrial journalist, Sucithra Mani — AI-powered.
www.jacobs.com
By combining flood protection, ecological restoration and stormwater management within a single river corridor system, the design approach aims to reduce flood risk in surrounding suburbs while improving water quality and restoring natural habitats.
The scheme design also establishes a long-term framework for maintaining hydraulic stability and environmental performance across the corridor while enabling public access, recreation and community use of the regenerated landscape.
Edited by an industrial journalist, Sucithra Mani — AI-powered.
www.jacobs.com
