
Welcome to CivilGEO Knowledge Base
Welcome to CivilGEO Knowledge Base
Welcome to CivilGEO Knowledge Base
Welcome to CivilGEO Knowledge Base
A diversion is an element with two outflows, main and diverted, and one or more inflows. Inflow comes from other elements in the basin model. If there is more than one inflow, all inflows are added together before computing the outflows. A diversion can be used to represent weirs or pump stations that divert flow into canals or off-stream storage. The diversion element includes optional properties for limiting the amount of diverted flow.
In GeoHECHMS, diversions can be defined by either drawing or assigning nodes on the Map View using the following commands:
The Draw/Assign Diversions command is used to manually draw/assign multiple diversion nodes on the Map View, one after another, until completed.
Follow the steps below to use the Draw/Assign Diversions command:
The Draw Diversion Nodes section is used to draw diversions on the Map View using nodes. To draw diversion nodes, follow the steps below:
The Select Diversion Nodes section can be used to manually assign multiple nodes on the Map View as diversions. To assign diversion nodes, follow the steps below:
This section is common to both the Draw Diversions and Assign Diversions dialog boxes and is used to specify the diversion ID for each drawn/assigned diversion. The user can assign these IDs either manually or automatically using some predefined formats.
Follow the steps below to assign diversion IDs to the diversions:
Note that if the auto-name option is enabled and the user returns to the dialog box, the [Apply] button will be disabled since the just drawn/assigned diversions have already been named and created.
This section is common to both the Draw Diversions and Assign Diversions dialog boxes and allows the user to assign an invert elevation to the diversion using a terrain model. Define this section before drawing diversions so that invert elevations can be assigned.
To assign an invert elevation, the Terrain elevation source dropdown combo box supports the following surface types:
The user can also apply an elevation offset to raise or lower the diversion by the specified amount by checking the Apply elevation offset checkbox. On selecting this checkbox, the entry field next to it becomes available for entering an elevation offset value. A negative offset value will lower the diversion by the specified amount.
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