06 Jun '11, 11pm

Our reader's ideas for flood prevention: Rain gardens and green roofs. What are yours? #SGflood

I REFER to yesterday's report on Sunday's flood ('Govt to review drainage after year's worst flood'). With increasing urbanisation in Singapore, more areas of natural vegetation are replaced with impervious concrete. Instead of infiltrating into our soils, rainwater is now channelled as surface run-off. This dramatically increases the pressure on our drainage system, which faces a peak discharge that is both larger in volume and faster in onset after every major storm. While recent developments such as Ion Orchard and new condominiums in Bukit Timah may not have directly contributed to the flood, they may have accelerated the increase in run-off volumes that the drains must now cope with by occupying areas that were formerly parks and green spaces. The traditional conveyance approach of channelling stormwater into large, concrete- lined canals has shown its limitations in ...

Full article: http://www.straitstimes.com/STForum/Story/STIStory_676917...

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asiaone.com 06 Jun '11, 3am

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asiaone.com 05 Jun '11, 12pm

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