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Using a network of smart sensor controls that drive hydraulic gates and valves in response to predicted rainfall data, PyTerra’s system captures excess surface water from upstream areas and diverts it to floodplains and retention areas as necessary throughout the annual water cycle. This addresses both flood and drought issues as the water can be released when needed, for use by a wide range of local stakeholders such as water companies.
In conjunction with professional services firm WSP, Dr Wouter Buytaert, of Imperial College London, Department of Civil and Environmental Engineering, used hydrological modelling techniques to demonstrate the potential of the new system.
David Arscott of PyTerra comments:
“Dr Buytaert’s expertise has allowed us to assess and validate the level of benefit that our system can deliver. His report will help to support our grant applications for further research and could play a part in influencing the water industry to take a more holistic approach towards developing freshwater solutions at a catchment level”.
Hydrological modelling expertise
The team, led by Dr Buytaert, used an existing UK hydrological model to look at the impact that a number of flood storage areas and flow control devices had on a known area of flooding.
Dr Buytaert adds:
“We considered three scenarios: a) no control network; b) a traditional control network with manually operated gates and upstream storage; and c) a control network with variable opening gates and upstream storage using telemetry and intelligent algorithms – PyTerra’s system. This showed that the proposed system can have many advantages over other set ups, for example reduced downstream flooding, smaller upstream storage areas, and faster drain-down of storage areas following a weather event”.
Broader implications
The development of this new system is particularly welcome, given the UK flooding seen earlier in the year resulting from severe storms. This approach to freshwater management has not been attempted at this scale before.
Additionally, socio-economic pressures are increasing the need for all sectors to deliver water services, for example supply diversification and biodiversity enhancement. This is encouraging both government and industry to move away from a ‘silo’ approach, towards cross-sector solutions where the true value of water can be recognised.
Actively managing the system through intelligent and sensor-driven controls means that the network has the potential to optimise the portfolio of ecosystem services provided by the terrestrial water cycle.
David Arscott adds:
“With this type of optimised approach, stakeholders such as flood authorities, water companies, infrastructure projects (e.g. HS2) and land developers can all set water service targets if they are willing to pay land owners for the benefits the system can deliver. However, such a ‘market’ can only exist where there is a system in place to consistently estimate, deliver and measure the services. Dr Buytaert’s report shows that the proposed system achieves these things, making it an exciting time going forward for us at PyTerra”.
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