openTELEMAC The mathematically superior suite of solvers

Hello,

I have a simulation project consisting of an inflow, an outflow, and a weir located between them. I have performed multiple calculations by varying the weir dimensions and the number of weirs. However, in every case the simulated outflow is greater than the inflow.

Could anyone help me identify where I might be going wrong or what could be causing this difference?

I have uploaded all the relevant data.

Kind regards
Sandip

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weir