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**FEFLOW / Mass concentration BC constraint for seepage nodes**

« **on:**July 07, 2020, 08:32:05 pm »

Hello,

I am simulating seawater intrusion in a coastal aquifer with a portion of the model domain being the seafloor. For the seafloor nodes, I want to have a constant seawater head BC, and a conditional mass concentration BC, with zero-gradient for negative fluid flux (outflow) and C=Cmax otherwise. In other words, for the seafloor nodes I want seawater concentration if there is no seepage, but the BC turned off (or replaced by a zero-gradient BC) if there is seepage.

I wanted to use the mass concentration BC with a min mass-flow constrain of zero, which means that the BC is active only if seawater infiltrates (mass-flow > 0), but I'm not sure this does what I want. Does it?

Thanks in advance,

Anner.

I am simulating seawater intrusion in a coastal aquifer with a portion of the model domain being the seafloor. For the seafloor nodes, I want to have a constant seawater head BC, and a conditional mass concentration BC, with zero-gradient for negative fluid flux (outflow) and C=Cmax otherwise. In other words, for the seafloor nodes I want seawater concentration if there is no seepage, but the BC turned off (or replaced by a zero-gradient BC) if there is seepage.

I wanted to use the mass concentration BC with a min mass-flow constrain of zero, which means that the BC is active only if seawater infiltrates (mass-flow > 0), but I'm not sure this does what I want. Does it?

Thanks in advance,

Anner.