New Stormwater Tunnel In Hong Kong
Published on by Water Network Research, Official research team of The Water Network in Business
To Protect a Town from the Effects of Devastating Rain Storms, Mott Macdonald hasDesigned Flood Interception System - a New Approach to Drainage
Country-first flood relief
The solution is a 5.1km long tunnel which will intercept surface water run-off and discharge it into the sea. Three intake structures contain giant concrete spiral ramps, which avoid trapping air and dissipate energy to deliver water to the tunnels in a smooth, controlled stream.
The once-in-a-lifetime rainstorm that hit Tsuen Wan New Town, Hong Kong, in June 1997 unleashed a chest-deep torrent that swept up cars and left a trail of destruction. To avoid a repeat, Hong Kong Drainage Services Department commissioned a vast tunnel to intercept rainwater run-off and carry it underground to the sea. Mott MacDonald produced a drainage master plan for the district in 1998 and has taken the flood bypass through design to construction, which got under way in 2009.
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