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Hello everyone,

I am trying to implement a weir in a new model and I cannot find where to define the type of weir: from the main telemac2d.f file, I can see the variable TYPSEUIL used in logical conditions but not where its value is defined (not in cas fil, not in weir file).

In addition, the weir type #2 uses variables NDGA1, NDGB1 but also NDGA2 and NDGB2 to define the weir location/geometry. To what nodes do these last 2 variables correspond?

Thank you for your help,
Chris.

Hi Chris

TYPSEUIL is define by a KEYWORD in the steering file. Look at "TYPE OF WEIR"
The default value is 1 so if you use the main implementation this is not necesasry to define the keyword.
This is only required for the new implementation developped by Artelia.
In this implementation, the weir discharge is applied on sources point (instead of liquid boundary), without taking account the velocities (which by consequences should be low). The main advantages is the possibily to have a different number of nodes on the both sides of the weir...

About the NDG informations, as the weir is define by the nodes of its crest, you should associate, for each node of the crest, the 2 computation nodes for the both side to identify where the water level should be estimate and where the discharge should be applied...

To complete, you should know that this method works in parallel but is not efficient (as the computation is often slower than the sequential one).
I'm actually fully rewriting this part in order to improve the parallel computation so things will change in a near future (maybe more 7.2 than 7.1)

Regards

PS: update your profile

Thank you Christophe for this quick and clear reply!