Storage Routing Hydrological Model property sheet
This sheet appears when a storage routing model is selected in the Hydrological Model dialog box. It can take three forms, depending on the type of storage routing model selected.
For a RORB type model it appears as shown below. A model name, initial and continuing losses for impervious areas, and values of the routing parameters, kc and m, are to be entered. The losses for impervious surfaces are fixed. The continuing losses can be constant or proportional (i.e. the rainfall excess in a period is a constant proportion of the rainfall).
For a RAFTS type model, the property sheet is similar, with the BX parameter replacing kc and the Storage Exponent n parameter replacing m.
For a WBNM type model the sheet again similar to the RORB sheet, with a lag parameter.
Several runoff routing models of the same type can be set up in the Hydrological Models Data Base and selected from this when entering data for particular sub-catchments and stream routing reaches, as described in the RORB, RAFTS and WBNM model layout information. It is not allowable to mix the different types of storage routing models, as this would create serious conflicts in the model structure.
Related Articles
Layout for WBNM type storage routing model
A catchment is divided into sub-catchments that depend on junctions of streams and internal ridge lines. Nodes should be placed at the outlets of self-contained sub-catchments - those at the top of the catchment, with no streamflow from upper ...Layout for RORB type storage routing model
A catchment is divided into sub-catchments that depend on junctions of streams and internal ridge lines. Nodes should be placed on streams adjacent to the centroids of sub-catchments, at stream junctions and at the outlet. Stream reaches are to be ...Hydrological model dialog box
From this window you can select the hydrological rainfall-runoff model to be used. The current default model selected for Designand Analysis runs is shown in the list box to the left. Clicking the Delete Default Model button deletes the highlighted ...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 ...Stream Routing Reach property sheet
This takes three forms, depending on whether the RORB, RAFTS or WBNM type of storage routing model is being used. RORB (for details see the RORB Model layout): RAFTS, which uses the same property sheet as overflow routes from pits (for details see ...