User Forum of Software BASEMENT

Gonne

User

Registered: 2015-11-20

Posts: 15

Outflow condition with critical depth

Hi,
sorry for the simple question.
I would like to put critical depth as outflow boundary condition, because I have a weir in a predefined elevation.
I put as outflow condition "gate" (because I only have the meters above sea level of the top of the weir) with a text file with two columns, time and corresponding gate elevations (constant in time).
Is it correct?
If it isn't correct, how can I force the transition to critical depth?
Thank you.

René Kaufmann

User

Registered: 2016-01-28

Posts: 22

Re: Outflow condition with critical depth

Hi
I would chose a weir, because I know the height of the weir. Why did you chose the gate condition?

The weir works like the gate, time and corresponding weir height.

Gonne

User

Registered: 2015-11-20

Posts: 15

Re: Outflow condition with critical depth

I thought that the weir conditions was just for the height of the structure and not for the meters above sea level.

Now I have a problem with the boundary conditions (very strange because I didn't change anything from the last simulation with the same data): when the simulation start, it gives me the following error:

WARNING -> At the hydrograph boundary all edges are set inactive (not wetted), but
   the inflow is bigger than 0.0. Either the cells in the boundary cross
   section are too big or the inflow is too small to ensure that at least one
   element is wetted.

What does it means? How can I fix it?
Thank you.