Solar-powered sensors have been installed at strategic locations across Changi Airport’s drain network to monitor drain conditions round the clock
Flash flood alerts
Debris in drains is a common occurrence. With the Northeast monsoon season approaching, it is important for CAG to be able to monitor the conditions of its drains 24/7 online, so that it can activate remedy actions immediately when required.
To this end, CAG’s Engineering and Development team has installed seven sensors at strategic locations across the airport’s drain network, with four more to be added by February 2022. These sensors are able to track the rate that water is building up in the drains and the south detention pond in real-time. In the event of any anomalies, for example where there is debris or chokage, the team is able to deploy resources on ground quickly, to mitigate the possibility of floods.
This additional layer of defence had successfully helped Changi to prevent a potential case of flooding back in early September 2021, after a bout of extremely heavy rain. The sensors triggered an alarm, which alerted CAG’s Engineering team to rising water level in the outlet drain serving the south detention pond, even though the rain has stopped. Workers were quickly deployed to that drain to remove debris (such as dried leaves) from the security grilles, effectively resolving the situation.
In addition to real-time camera footage, data collected by the sensors can also be viewed on a dashboard, allowing the Engineering team to analyse the data and predict trends going forward.