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Singapore’s Deep Tunnel Sewerage System–Phase 2

Author(s): Dominique Brocard

Linked Author(s): Dominique Brocard

Keywords: IAHR; Hydrolink; Drop Structures; Singapore’s Deep Tunnel Sewerage System (DTSS); Dominique Brocard


Singapore’s Deep Tunnel Sewerage System (DTSS) aims to provide a robust and efficient means of meeting Singapore’s used-water needs. DTSS2, the second phase of this project, comprises two tunnels, multiple link sewers and a new water reclamation plant. DTSS2 includes numerous vortex drop structures. For the final design, all the vortex drop structures were modelled using Computational Fluid Dynamics (CFD) to refine the designs developed during preliminary design. Particular features of the DTSS system include Air Jumpers (AJs) to avoid odours at ground level and Roller Gates to isolate tunnel sections, should maintenance ever be needed.


Year: 2024

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