SINGAPORE — The Public Utilities Board (PUB) will carry out road-raising work for a 450-metre stretch of Dunearn Road to mitigate flood risks, following flash floods in the area on Tuesday (24 August).
In a Facebook post on Saturday, PUB said that the road-raising work - expected to be completed by November - is an interim measure, as there is an ongoing drainage improvement project to widen and deepen a 900m section of the Bukit Timah Canal. The project is expected to be completed in 2024.
"The flash flood that occurred along a stretch of Dunearn Road from Sime Darby Centre to Binjai Park on 24 August was due to intense rainfall which temporarily overwhelmed the drainage capacity at a section of Bukit Timah Canal," it said in the Facebook post.
The completed upgraded canal will "enhance flood protection for the surrounding area including Dunearn Road, and reduce the risk of flash floods occurring", said PUB.
Improving flood resilience over past decade
PUB added in the post that it had made "significant investments" in improving flood resilience for the upper Bukit Timah area over the past decade.
In 2013, it expanded a portion of the Bukit Timah Canal from Sixth Avenue to Jalan Kampong Chantek. In 2019, upgrading work on the Bukit Timah First Diversion Canal was completed to enable it to convey 30 per cent more rainwater to cope with increased rainfall.
"However, it is not always feasible to expand our drains to cater to every extreme rain event due to land constraints," PUB said in the Facebook post.
"PUB has a comprehensive flood management strategy, including the monitoring of road conditions and water level in our drains and canals through an extensive network of water level sensors and CCTV cameras.
"We also leverage radar technology to forecast potential flash flood locations, so as to quickly deploy our Quick Response Teams across the island. They help to keep public out of harm’s way by directing traffic away from floodwaters and assisting stranded pedestrians or motorists."
On Tuesday, PUB issued flood risk warnings for several locations, including the Upper Bukit Timah area, Woodlands and Sunset Drive.
It said the heaviest rainfall recorded in western Singapore on Tuesday was 159.8 millimetres at Bukit Panjang Road rainfall station from 7.50am to 10.40am.
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