
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 Diversions command is used to manually draw multiple diversion nodes on the Map View, one after another until completed.
Follow the steps below to use the Draw Diversions command:
The following sections describe how to use the Draw Diversions command and interact with the above dialog box.
Selection of a naming method from the Diversion Specifications section should be considered before drawing (or placing) diversions. If the Diversion ID radio button option is selected, then only one diversion can be drawn at a time. By contrast, if the Auto-name diversion ID radio button option is selected, the user can interactively and continuously draw diversions on the Map View without purposefully interacting with the dialog box each time a diversion needs to be identified and named.
To draw diversions one at a time, naming each individual diversion before drawing the next one, follow the steps below:
To draw multiple diversions continuously without having to purposefully interact with the dialog box to identify and name each diversion, follow the steps below:
This section of the dialog box allows the user to assign an invert elevation to the diversion using a terrain model. Define this section before drawing diversions so that the 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.
The Assign Diversions command is used to manually associate previously drawn nodes as diversions. Note that this command works similarly to the Draw Diversions command.
Follow the steps below to use the Assign Diversions command:
The following sections describe how to use the Assign Diversions command and interact with the above dialog box.
Selection of a naming method from the Diversion Specifications section should be considered before selecting diversion nodes. If the Diversion ID radio button option is selected, then only one node can be selected and assigned as a diversion at a time. By contrast, if the Auto-name Diversion ID radio button option is selected, the user can interactively and continuously select nodes on the Map View to assign them as diversions without having to purposefully interact with the dialog box each time a diversion needs to be identified and named.
To assign diversions one at a time, naming each individual diversion before assigning the next one, follow the steps below:
To assigns multiple diversions continuously without having to purposefully interact with the dialog box to identify and name each diversion node, follow the steps below:
Note that the Assign Invert Elevation section of the Assign Diversions command is similar to that of the Draw Diversions command. Hence, refer to the Assign Invert Elevation section of this article to learn more about it.
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