Drainage Services Department Technical Manuals Repository

Maintained by the Drainage Services Department (DSD) of the HKSAR Government, this official technical portal serves as the master repository for engineering manuals, design codes, operational guidelines, and structural design standards governing wastewater and stormwater infrastructure across Hong Kong. The repository consolidates mandatory engineering manuals including: (1) Stormwater Drainage Manual (SDM) setting hydrological and hydraulic design standards, rainfall-runoff modeling, and flood prevention criteria; (2) Sewerage Manual (SM) regulating foul sewerage network design, sewage treatment plant engineering, pumping stations, and effluent disposal; (3) Structural Design Standards incorporating Eurocodes alignment for public works water retaining and underground drainage structures; and (4) DSD Standard Drawings and Practice Notes. It is an indispensable technical baseline repository for civil engineers, environmental engineers, hydraulic modelers, building services engineers, infrastructure planners, and university students studying public health engineering, hydrology, and municipal infrastructure design in Hong Kong.