Source or Sink in Unsteady Model?

[Anonymous]

Hello,

I am trying to model a point source and sink in an unsteady 1D model. Any idea how to do this? I think I can achieve a source using a lateral inflow boundary? But I would like it to be a sink?

Thanks!

Apologies for duplicate post – somehow accidentally pasted something in the title last time

[PaoloP]

I’m not sure RAS allows negative discharge in lateral inflow.
For sure you can define a Lateral Structure and than define the sink with Rule BC.

Paolo

[Anonymous]

would you be able to explain a bit how to do this? I’ve never used the rules BC.

[PaoloP]

Rules BC allows to define the flow in the lateral structure constant, based on variables in your model or time.

To define rules RAS gives you a simple programming language.

Take a look of Chapter 16 Advanced Features for Unsteady Flow Routing in HEC-RAS Users Manual

[Author]

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