Overflow route from a RAFTS storage routing node

When applying storage routing models, there are different types of stream routing reaches for the RORB and WBNM models. The RAFTS model uses the same overflow route as for pits for routing through links. Data must be provided on two pages.  In the first, translation or kinematic wave routing must be specified, as shown below:

The kinematic wave procedure follows a method described in F. M. Henderson's Open Channel Flow, Macmillan, 1966 and is recommended over the simpler translation procedure.

In the second page, labelled Cross Section Data, a representative cross -section and slope for the stream channel must be specified.

​

• Related Articles

• Layout for a RAFTS storage routing model

  A catchment is divided into sub-catchments that depend on junctions of streams and internal ridge lines. There is considerable latitude in setting out RAFTS models. Most users will locate nodes at the center of sub-catchments, even though they ...

• Overflow route property sheet

  This is used to define the hydraulic characteristics of the flow paths along which overflows from pits, headwalls and detention basins may flow. It takes different forms depending on the type of node from which the route comes, and on the options ...

• Overflow Route drawing tool

  This tool, , is used to draw lines or poly-lines in the the Main Window, representing the paths of overflows from pits and detention basins to downstream pits and nodes, or those going out of the system. It is also used to define flow paths or ...

• Storage routing models

  (a) General As well as the standard Horton (ILSAX) hydrological model for simulating flows from urban areas, DRAINS has optional storage routing models based on procedures applied in three hydrological models that have been used in Australia since ...

• Storage routing calculations

  These are carried out over a series of time steps, with the information obtained from solving equations at one time step being used as an input to the next step. In reservoirs, the information needed is: a relationship between storage and outflow, ...