Surrey council uses laser mapping for flood alleviation
Surrey Heath Borough Council has turned to airborne laser mapping to help flood alleviation works on Chobham Common, one of the largest National Nature Reserves in the South-east. The LiDAR data from Bluesky has been captured using aircraft-mounted sensors to provide centimetre accurate land elevation data.
Using the Bluesky data Surrey Heath has identified the potential to reinstate some medieval ponds and hopes to attenuate flood water coming off the common into nearby villages in this area of the London green belt.
James Rutter, GIS manager at Surrey Heath Borough Council, said: “I’ve not actually used LiDAR data before but am extremely impressed with the quality, density, coverage and accuracy of the height data. I have also been impressed with the service and support from Bluesky.
“Using the data we have been able to run a watershed analysis on this hugely important and sensitive site.”
The Surrey Heath data was captured using Bluesky’s state of the art airborne mapping system. The LiDAR (Light Imaging Detection and Ranging) system uses aircraft mounted lasers to accurately determine the distance between the sensor and the ground or other targets such as buildings and vegetation.
Bluesky uses an Optech Orion M300, the highest specification instrument being operated from a UK base. This allows for the capture of LiDAR data at a higher point density and at a better accuracy than other systems due to an increased pulse repetition rate. The system also includes the latest available technology in global positioning and inertial measurement for improved accuracy sensor positioning.
The Bluesky system is also fully integrated with a photogrammetric survey camera (the CS-10000) and a thermal infra-red imaging system (the CS-LW640), to allow the simultaneous capture of truly co-registered data where required.
- UK breached sewage law, says European court The UK has escaped being fined despite the European Court of Justice finding it guilty of breaching EU law regarding the... Read More >
- Northern England braced for more rain as EA leads flood recovery Communities in Cumbria, Lancashire and other parts of Northern England are preparing for further rain over the weekend as... Read More >
- Internal Drainage Boards to transfer to Natural Resources Wales The functions, assets and staff of the Powysland, Lower Wye and Caldicot and Wentlooge Levels Internal Drainage Boards... Read More >
- Tyre microplastics pollution: Ignore it or remove it? Tyre microplastics is one of the largest sources of pervasive pollution in the water environment, yet consistently ignored... Read More >
- Meeting the SuDS challenge A report indicates that the UK has a long way to go on implementing sustainable drainage systems, yet advice and... Read More >
- Capital's infrastructure needs integrated water approach The concerns of Londoners about the capital city's resilience highlight the need for integrated planning across water,... Read More >
- Ready for anything: Resilience in the Round Resilience is one of the four priorities that Ofwat wants to see water companies adopt in their plans for PR19. But what... Read More >
- Moving towards greener resilience Nature-based solutions can help us to see the big picture when building in system resilience, writes Dr Jonathan Simm,... Read More >