Internal Boundary Conditions within 2D flow areas

[Anonymous]

Hello,

I am running HEC RAS 2D unsteady model. I have gauge discharge values at some points on the river which is enclosed within the 2D flow area. I would like to include those flow values as internal boundary conditions, not as additional flows but as actual flows. Is there any way to do it in HEC RAS 2D?

[Anonymous]

Are you saying you want to show an exact flow value at an exact location on a stream independent of the inflow?

For example your peak inflow hydrograph at the top of the reach is 250-cfs and 1 mile down the stream you want the flow to be exactly 200-cfs

Am i understanding your question correctly?

[Anonymous]

Mr. Partida,

Yes, your understanding about my question is correct. The value at 1 mile downstream should be equal to 200-cfs and this flow value should contribute to the further downstream points.

[Anonymous]

Im not sure its possible. Theres obviously internal BC conditions allowed to add inflows anywhere in a mesh you need to. But requiring a certain value doesnt seem possible. And if you entered a dummy hydrograph (generate one manually) that would add the 200-cfs then you would be incorrectly representing the flow from a volume standpoint.

[Author]

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