Weir has almost the same purposes as Orifice, located in the outlet; however, it functions differently. Weir raises the water level and forces it to spill over.
Parameter Name |
Description |
Default Value |
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NHYD |
Hydrograph number. |
— |
NAME |
Name of the component. |
— |
From Node |
The name of the from node. |
— |
To Node |
The name of the destinated node. |
— |
COMMENT 1, 2, and 3 |
Comment for the command. |
— |
Tag |
Optional category or classification. |
|
Type |
Type of weir (Transverse/Sideflow/Vnotch/Trapezoidal/Roadway). |
transverse |
Height [m] |
The vertical height of the weir opening. |
1 |
Length [m] |
The horizontal length of the weir crest (or crown for V-NOTCH weir). |
1 |
Slope Side |
Slope (width-to-height) of a TRAPEZOIDAL weir side wall. |
— |
Inlet Offset [m] |
Depth of bottom of weir opening from inlet node invert. |
0 |
Discharge Coeff. [CMS] |
Discharge coefficient for the central portion of the weir. |
3.33 |
Flap Gate |
Select YES if the weir contains a flap gate to prevent backflow. |
NO |
End Contraction |
Number of end contractions. |
0 |
End Coeff. [CMS] |
Discharge coefficient for flow through the triangular ends of a TRAPEZOIDAL weir. |
— |
Can Surcharge? |
Whether it can surcharge or not (Yes/No). |
NO |
Coeff. Curve |
Click on … to enter Head-Coefficient data for the weir. |
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