The Leeds Phase 1 Flood Alleviation Scheme (FAS) is one of the UK’s largest flood defence projects and the first in the country to use moveable weirs as a pioneering solution to flooding.
First-hand experience of flooding
With a local office located on the River Aire and having seen first-hand the effects of flood damage to the area, Arup became involved in the project to develop a new scheme that provided a more sustainable solution.
Working together with Leeds City Council, we developed an alternative proposal more in keeping with the city’s character and landscape. We focused on reducing the obstructions that were causing water levels to rise, meaning we could significantly reduce the visual impact of the flood measures on a smaller budget whilst enhancing conservation of the local environment.
The first phase of the scheme was completed in 2017, and it is now helping to protect more than 3,500 homes and 500 commercial city centre properties as well as critical access routes to Leeds train station.
Achieving efficiency through BIM digital modelling
From the outset, we developed a 3D digital model of the city to visualise the high flood risk and help convince stakeholders, including political decision makers, of the urgent need to improve flood mitigation.
As the project developed, we introduced a web-accessible interactive BIM model to ensure all stakeholders - including the project team, the client, the planning authority and the design and build contractor - had access to the most up to date project information at any given time. The project team was able to navigate the complete scheme within the digital model, enabling a collaborative approach and allowing for critical issues to become more apparent and be mitigated earlier, providing greater certainty for construction costs.