The Drainage module allows the design of drainage networks, typically those required for new land subdivisions and development projects.
The drainage string itself consists of manholes, joined by straight or curved pipes. Invert levels and pipe grades can be set or modified graphically or by typed input. Manhole
and pipe sizes are also user definable.
Drainage design can be as simple or complex as the project dictates. 12d automatically determines pipe grade based on minimum slope and cover while services clashes are displayed graphically. Data is exported to the design packages Drains,
PCdrain, XP-SWMM, XP-UDD, RAT2000, RATHGL, ILSAX, WINDES (Micro Drainage) and spreadsheets. The data exported can be as simple as catchment areas or as advanced as pit inlet capacity and overland flow (determined inside 12d by measuring road cross fall and grade). Even maximum ponding levels and volumes can be determined for inlet in SAG inlet conditions.
Results from the design packages can be read back into 12d enabling the user to....
- update 12d with the new inverts and pipe sizes from the drainage design software.
- plot customised drainage long sections with service crossings, hydraulic grade line, flow, velocity and/or user defined data. Services that cross the drainage pipe and those within a user defined corridor (parallel to the pipe) are also included.
- plot customised plan drawings indicating catchments, pipe sizes and types, inverts and more.
- print pit construction schedules in predefined or custom formats.
- produce pit/pipe quantity schedules by pipe sizes, depths, types etc (all custom defined).
- detailed excavation volumes reflecting pipe sizes, over excavation for bedding materials and user defined trench shapes. Volumes by depth can then be calculated using the 12d volumes package.
- calculate and display/plot flooded areas from overflow volumes or overland flow discharges (normal depth calculations).
- create HEC RAS project files for detailed backwater calculations in critical areas.
