Xylem’s Storm Water Solution Prevents Multiple Flooding in Malaysia Since 2007


An award-winning storm water solution designed by Xylem Inc. has prevented seven major potential floods in the Malaysian capital Kuala Lumpur since 2007, according to KoonSing Low, Director of SMART with the Malaysian government.

Xylem designed the unique Storm Water Management and Road Tunnel (SMART) system to manage a notorious flash flooding problem in Kuala Lumpur’s central business district.

The $600 million SMART project was commissioned in 2004 by the Malaysian government as a solution to control storm water, and was put into operation in 2007. Located at the confluence of the Klang and Gombak rivers, the area around Kuala Lumpur is prone to serious flooding. Continuous urban development has placed pressure on the city’s drainage system to cope with flash floods. Between 2000 and 2003 the city experienced devastating floodwater damage.

The first of its kind in the world, Xylem’s innovative design incorporates a tunnel which diverts storm water before it enters the city center and acts as a double-decker motorway link during drier periods relieving traffic congestion on the city’s main highways. The 9.7 kilometer long tunnel can hold up to one million cubic meters of water which is released into the river downstream from the city to prevent flooding. Since its installation, the solution has controlled seven flood waters preventing serious damage to the city.

The system incorporates a holding basin with a floodwater storage capacity of 600,000 cubic meters, a reservoir with a capacity of 1.4 million cubic meters and the bypass tunnel. Twenty-three pump stations are equipped with high-tech pumping solutions including 76 of Xylem’s Flygt-brand pumps, capable of dewatering all floodwater in the tunnel within 24 hours. The system also incorporates a control center for managing, operating and maintaining the SMART system.

KoonSing Low, Director of SMART said, “Xylem’s Flygt brand has a proven track record, with many successful installations in irrigation and flood control applications. That, combined with their competent technical support and after sales service is why we chose them for this project.”

The ingenious project has received several international engineering awards for its innovation, functionality and affordability. Officials from other cities that face similar flooding issues such as Singapore and Jakarta have visited the SMART tunnel to investigate a similar project back home.

Since the success of the SMART project, Xylem has received many orders from other flood mitigation projects across Malaysia, confirming Xylem’s position as the market leader in flood mitigation projects.

Project specifications

76 Flygt pumps were used for the SMART project:

  • Portal: 18 x N/CP 3201MT c/w fluid valve, 3 x CP3306 c/w flush valve, 2 x CP3102 HT
  • Cross passage: 18 x NP3153SH. 9 x CP3102HT
  • Shaft drainage: 8 x CP3152HT
  • Main road tunnel: 5 x CT 3501/835/170kw, 2 x CT3300MT, 2 x CP3085MT
  • Main flood tunnel: 4 x CP3800/905/275kw, 1 x CP3300MT
  • Fire pumps: 1 x A. G. c/w 110kw engine, 1 x A.G. c/w 110kw motor, 1 x CP3085HT,
  • 1 x Lowara multistage 11kw

Source: Xylem Inc.

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