About the Project
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Project Background

The existing drainage systems in the developed districts of Sham Shui Po, Cheung Sha Wan and Lai Chi Kok were built more than 40 years ago. Owing to rapid developments and changes in land use over the years, the capacities of the existing drainage systems have not achieved the required flood protection standard.

Drainage Services Department (DSD) formulated the Lai Chi Kok Transfer Scheme (LCKTS) comprising Lai Chi Kok Drainage Tunnel and Inter-reservoirs Transfer Scheme (IRTS) in 2005. LCKTS was implemented and completed in 2012 to intercept the surface runoff from the uphill catchment areas for direct discharge to the Victoria Harbour. On the other hand, the construction of IRTS commenced in February 2019 and is anticipated to be completed in 2022.
Project Background

Project Objective

The IRTS includes the construction of a 2.8km long water tunnel connecting Kowloon Byewash Reservoir (KBR) and Lower Shing Mun Reservoir (LSMR). Prior to heavy rainstorms, the water stored in KBR will be conveyed to LSMR in advance to provide an approximately 350,000m3 flood storage space in KBR. This storage capacity allows for collection of the surface runoff in KBR during heavy rainstorms and reduces the chance of overflow entering the urban areas. As a result, flood prevention of Sham Shui Po, Cheung Sha Wan and Lai Chi Kok will be enhanced. An estimated average annual additional fresh water yield of about 3.4 millions m3 will be generated and the dual purposes of flood prevention and conservation of precious water resources will be achieved.
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Works Details

Contract No. DC/2018/08
Inter-reservoirs Transfer Scheme – Water Tunnel between Kowloon Byewash Reservoir and Lower Shing Mun Reservoir
Project Scope: Construction of a water tunnel of about 2.8 km in length and 3 m in diameter, from Kowloon Byewash Reservoir to Lower Shing Mun Reservoir and the associated intake and outfall structures at both ends of the tunnel
Major Improvements and Benefits: The IRTS serves dual purposes of improving flood protection level in West Kowloon areas and achieving water conservation by transferring collected surface runoff from the Kowloon group of reservoirs to the Lower Shing Mun Reservoir. It will also strengthen our resilience in flood mitigation for combating climate change.
Consultants: Binnies Hong Kong Limited
Contractor: Bouygues Travaux Publics
Contract No.: DC/2018/08
Project Commencement Date: 27 February 2019
Project Completion Date: End 2022
Project estimate: $1,222 million
Controlling Division Drainage Projects Division
Type: Flood Prevention
District: Sha Tin
Status: On-going