Flash floods in several areas to be resolved soon: PUB
At least eight flood alleviation projects will be completed or be will be close to completion in Dec, said PUB. -ST
Wed,
Dec 12, 2007
The Straits Times
AT LEAST eight flood alleviation projects will be completed or be will be close to completion in December, said PUB in a statement on Wednesday. It pointed out that it has been putting such projects
on high gear, in anticipation of the intense and heavy rainfall expected this month.
'We have a 5-year drainage construction programme but many of these had been brought forward to alleviate flash floods in localised spots,' said Yap Kheng Guan, PUB's Director of Drainage.
PUB noted that the situation has improved in several areas, with the completion of new drainage works.
At Bedok North Ave 3, temporary flood alleviation measures were taken after it was hit by heavy rains in April 2006.
More drainage holes were created to allow quicker flow of water into the drains. Permanent drainage works have now been completed with the widening of the roadside drains as part of the redevelopment works in that area.
At Maple Avenue in the Bukit Timah area, the drainage system was improved and completed last month.
A temporary dam was built at the junction of Cuscaden Road and Tomlinson Road after a flash flood in Jan 2007. This is to slow down the water flow to the lowest point of the road where water tended to collect.
PUB said the long-term solution is to raise the road level there - which will be completed in December. A wider drain is also being constructed. Even though works are still ongoing, PUB said it has already brought flood relief in that area as rain water is drained away more quickly.
At Kramat Lane, the road level will be raised and construction works to widen and deepen the existing drain will be completed by December. In the past, water used to collect at a depressed section of the road.
At the junction of Mountbatten Road and Tanjong Katong Road - another flood-prone area - drainage works will also be completed in December.
Construction works have been ongoing since Aug 2005 at Commonwealth Avenue and the S$12.8 million canal is now at the 85 per cent completion mark.
The area used to flood during heavy and intense rain due to the small capacity of its current drain.
At Joan Road, which lies in the Caldecott Hill valley, its natural terrain causes water to collect during heavy and intense rain.
PUB said intermediate flood alleviation works are in progress, with the widening and deepening of the existing drain, doubling its capacity. Although this has not been completed, it has improved the flow of rainwater.
Over at Sims Avenue, a larger drain is being built. In the meantime, a temporary pump has been installed to divert rain water to a larger drain nearby.
However, PUB noted that the biggest flood alleviation project is the Marina Barrage which will alleviate flash floods in the low-lying city areas.
Conceived as a three-in-one project, Marina Barrage will also create a new reservoir in the city and become a hotspot of recreational activities when completed in mid-2008.
A series of nine crest gates will work in harmony to release water from the reservoir during heavy rains and should the rains coincide with high tide, seven giant pumps will channel the water out to the sea.
In the meantime, about 100 of PUB's staff and contractors are on high alert this monsoon season - inspecting the drains everyday to make sure there are no blockages that could impede water flow.
'Blockages in drains are the most common cause of localised flash floods. We have often pulled out rags, styrofoam boxes and all sorts of rubbish from choked drains,' said senior technical officer Mr Thia Soon Swee, 59.
In the last 30 years, PUB has invested more than $2 billion on drainage improvement works.
As a result, the flood-prone areas have been reduced from 3,200 ha in the 1970s to 124 ha today.
With the completion of Marina Barrage, this will be further reduced to less than 100 ha.
High tides
Earlier, the National Environment Agency (NEA) said in a statement that afternoon and evening showers, with heavy thunder at times, can be expected from Wednesday till Friday.
With high tides of at least three metres predicted over the next two days and between the Christmas week of Dec 23 to Dec 28, NEA warns that flash floods could occur in low-lying areas.
These include Chinatown/City area, Tanjong Katong area, Geylang area, Lorong Buangkok and areas off Jalan Besar.
The high tides are expected to occur sometime in the morning - as early as 9.30am - or midday, as late as 1.30pm, NEA says in a statement.
For more information and updates on the weather, the public can log onto
www.nea.gov.sg.