AS/RISSB 7637:2014

The AS 7637 Hydrology and Hydraulics describes the hydrologic and hydraulic requirements (functions, performance, design constraints and risk attributes) for the design and assessment of railway infrastructure in relation to all forms of drainage and flood-prone areas. The Standard provides a framework that promotes consistency and efficiency in design, construction, commissioning, maintenance, monitoring and decommissioning of track drainage and waterway crossings. The scope of the Standard covers public and private railways and railway drainage systems on a whole of life basis, and any other drainage related work affecting the rail corridor. The subgrade is given equal importance for track performance as rail and ballast. This Standard addresses primarily the hydraulic design of surface and sub-surface drainage systems including river and floodway crossings, culverts, pipes, channels, pits and grates.