Happy Valley Underground Stormwater Storage Scheme wins 2012 IWA Project Innovation Awards
4 July 2012
The Drainage Services Department (DSD)'s Happy Valley Underground Stormwater Storage Scheme (HVUSSS) has won the 2012 International Water Association (IWA) Project Innovation Awards (East Asia Regional Awards) in the Planning Category. The IWA established the Project Innovation Awards Programme in recognition of excellent and innovative water engineering projects around the world.
The DSD has always been committed to adopting sustainable flood prevention proposals. The HVUSSS is Hong Kong's first application of the movable crest weir system with supervisory control and data acquisition. One of its advantages is more effective collection of excess stormwater, which results in a smaller storage tank. The shallow tank design also enables the water pump to consume less energy, as well as reducing construction time and costs. The HVUSSS answers problems related to flood prevention and environmental protection.
The project is Hong Kong's first example of applying state-of-the-art hydraulic modelling techniques including 1-D and 2-D hydraulic models for drainage network and overland flow. It also makes use of a 3-D computational fluid dynamics model to analyse the hydraulic performance of particular parts of the system in an effort to increase the precision of the flood prevention design.
Construction of the HVUSSS commenced in 2011. Upon the completion of Phase 1 in early 2015, residents of Happy Valley and the vicinity will benefit from an enhanced level of flood prevention. The project is scheduled for completion in early 2018 and its estimated cost is HK$1 billion. On completion, the flood prevention level is expected to be further upgraded to the ultimate design level.