I have problem with modeling side weir in the situation when diameter of the conduit changes for example from DN800 to DN300.
Side weir suppose to start working at crest elevation 97,55, but nothing happens when the water level in the conduit reaches this level. The water starts to overflow only at 97,7 only when water level reaches the maximum modeling point.
But when I change the diameter of the conduit to DN 800, so there is no change in the diameters in the profile line, side weir starts to work properly. If overflows as it should at elevation 97,30.
Please explain the hydraulics in these situations and why does side weir makes different effect in these two situations.
Hello Anzelika,
Was there any user notification for the conduit for which you changed diameter? From the first screenshot it appears that, first conduit is flowing surcharged. Are the manholes overflowing? There appears an overflow before it can reach weir location due to undersized pipe in first screenshot.
Have you set up the side weir correctly? Modeling a side weir conduit control structure
Please upload model files for our testing link mentioned here. Sharing model files.
Regards,
Sushma Choure
Bentley Technical Suppport