Bluesky LiDAR Helps Wiltshire Council Tackle Flooding Risk
Aerial laser mapping technology is helping Wiltshire Council investigate flooding in the Corsham area of the county.
Working with engineering consultancy Atkins, the Bluesky LiDAR data is being used to create a hydraulic model of the drainage network and its interaction with the watercourses serving the catchment. This detailed model will allow Council staff to predict the flow of flood water, as a result of rainfall falling directly onto the ground and of flow overtopping river banks or escaping from the drainage network via manholes and gullies.
In September 2014, heavy rainfall caused extensive flooding across Wiltshire. Wiltshire Council and Wessex Water worked alongside the Corsham Town Council, Police, Ministry of Defence and local schools to minimise the impact of flooded roads, including the major A4 trunk road. The same event flooded the railway line, and passengers had to be rescued from a train after it became trapped in flood waters.
Using the Bluesky LiDAR data, captured using aircraft mounted lasers, a hydraulic model of the drainage network in the Corsham catchment area is being created. A hydraulic model is a mathematical model of a fluid flow system, such as a water, sewer or storm system, and it is used to analyse the system’s hydraulic behaviour. Using the Bluesky data, staff at Atkins created a 2D mesh over the catchment area, which allows them to see the likely flow of water and its potential impact on people, property and infrastructure.
“Working with Bluesky, we were able to configure the LiDAR survey to meet our requirements,” commented Sophie Slade, Consultant Hydraulic Modeller at Atkins Global. “In fact, Bluesky gave us a choice of resolutions and a range of survey areas to allow us to decide on an appropriate scope for the modelling project. In the end, we were able to secure a higher resolution of data at the same price.”
Daniel Everett, Principal Drainage Engineer at Wiltshire Council, added, “Once the detail of the survey had been agreed, delivery of the data was prompt and we were kept informed at all stages.”
Since 2007, Wiltshire Council has established two Operational Flood Working Groups in order to address the growing threat of flooding. These groups provide a forum for stakeholders, including the Environment Agency, water companies and Town and Parish Councils, to work together to reduce flooding and its impact on communities.
- Luton Airport installs innovative water management system London Luton Airport has installed a new stormwater treatment system, the first of its kind in the UK, which will... Read More >
- Southern Water's Cleaner Seas for Sussex project officially opens Southern Water has officially opened its £300M Cleaner Seas for Sussex environmental scheme, which ensures that the 95Ml... Read More >
- Yorkshire Water gains accurate mobile connection visibility NetMotion Software, a leading provider of Mobile Performance Management (MPM) software solutions, is working with... Read More >
- Private drains and sewers transfer - six years on October 2011 marked a major change in the way sewers and drains running from private properties into the public sewer... Read More >
- Clear and consistent guidance for drainage design New guidance for the design of drains and sewers should provide the opportunity for installers to meet consistent... Read More >
- Interview: Lawrence Gosden, MD, Wastewater, Thames Water This month we talk to Lawrence Gosden, MD for wastewater at Thames Water, about building flood resilience in London and... Read More >
- Getting to Grips with… highway pollution Pollution from urban highways, trunk roads and motorways poses significant risks to the environment from toxic metals and... Read More >
- Rainwater spin-out companies offer innovative path Researchers from the University of Exeter's Centre for Water Systems are putting the latest rainwater harvesting and SuDS... Read More >