Site Visits

Site Visit One: Bells Creek and Dudley Creek
Two waterway projects which were carried out following the Canterbury Earthquakes to mitigate flood risk and incorporate the Council’s six values for waterways (ecology, landscape, recreation, heritage, culture and drainage). We will give an overview of these multi-disciplinary projects and visit the key sites of interest:
• Dudley Creek
o Dudley Creek – walk along the waterway – where the waterway capacity was upgraded, while enhancing ecology, landscape, and recreation
o Bypass intake structure – hydraulic structure which is the inlet to the high-level bypass pipe to the Avon River
o Bypass outlet structure – outlet to Ōtākaro/Avon River
• Bells Creek
o Edmonds Park – co-located sports field and flood detention storage
o Te Oranga Waikura – urban forest and flood detention storage
o Richardson Tce Pump Station – 4 m³/s stormwater pump station and large scale StormFilter treatment system

PPE Requirements: Closed in shoes, high vis vest

Site Visit Two: Evolving stormwater management in South-West Christchurch
In the past, much of Christchurch consisted of raupō swamp and deep peat swamps. The subsequent issues with drainage and sewage resulted in these lowland wetland areas being drained, and waterways channelised, for many years following settlement, with little knowledge on the subsequent effects on ecological values. The 2009 South-West Christchurch Area Plan provides a framework for a different strategy to manage growth, with a ‘blueprint’ for stormwater management that has enabled Christchurch City Council to effectively manage stormwater runoff for both quality and quantity from this rapidly developing area. This has a focus on a six-values approach to waterbody management, considering not just drainage, but ecology, culture, heritage, landscape, and recreation. Following the Canterbury earthquakes, the Land Drainage Recovery Programme was able to fast-track implementation of parts of the blueprint, combining over 2 million cubic metres of flood storage with stormwater treatment basins and wetlands.
This tour offers an opportunity to visit the wetlands and basins and enhanced waterways that have been developed under the blueprint. We will hear from speakers on how to develop multi-value facilities, floodplain management, and wetland treatment systems. The field trip will cover the innovative design of these wetlands and water body enhancements, the incorporation of the six values approach, the Council’s research programme to better understand the success of its practices, and lessons learned.

PPE Requirements: Closed in shoes, high vis vest

Site Visit Three:  Central City Hikoi – Ōtākaro Avon waterway
Ōtautahi Christchurch is a city founded largely on swamp, the vegetation raupo and flax. The Ōtākaro (Avon) and the Ōpāwaho (Heathcote) drained the swamps. As the city developed and became urbanised, the swamps were drained and over time many consumed into concrete pipes as part of the works that have created our fine city, delivered by the Christchurch Drainage Board.
Join us for a hikoi alongside the Ōtākaro (Avon) from the Margaret Mahy Playground to explore the history and future of urban water across Christchurch through to the Antigua Boatsheds, enjoying some great urban public realm delivered as part of CERA’s successful new waterfront delivery of Te Papa Ōtākaro / Avon River Precinct.
Along the way we will stop and hear from speakers talking about different aspects of this water story, including:
– The existence of several culturally significant tributaries of the Ōtākaro Avon
– The history of stormwater management in Christchurch introducing the six values approaches and the recent successful consenting process,
– Upcoming changes to the lower Avon Ōtākaro network and plans for the Residential Red Zone,
– All whilst showcasing some great examples of Water Sensitive Urban Design approaches starting to become more prevalent across the city with the rebuild a city’s stormwater network post-earthquake and the role of the Council’s Land Drainage Recovery Programme.

PPE Requirements: Sturdy and comfortable walking shoes will be a requirement, plus usual layers of clothes for all weathers, including a hat.