Karanka

Hi all,

I have a doubt related to the simulation of a semi-confined aquifer in FeFLOW.

For example, if we have an alluvional plain characterized by an unconfined aquifer overlapped to a confined aquifer: is it correct to consider globally the problem as an unconfined aquifer and only set the layer related to the confined aquifer as confined ?(i.e. if we have three layers, the first is set as phreatic, the second as dependent and the third layer as confined, but the problem is set globally as an unconfined aquifer).

thanks

Karanka

Hi,

I tried to insert 7 [b]multilayer wells[/b] into a model characterized by 4 layers in order to run a transient simulation and evaluate the pathlines: when I open the .dac file resulting from the simulation the pathlines/streamlines are not visible or there aren't; if I use a [b]well BC[/b] the pathlines/streamlines are visible in the .dac file!!

I wuold specified that performing the model with both the approaches the budget analysis (consequently the pumping rate) is correct.

what could be the cause of this problem? Why the pathlines are not visible using a multilayer wells approach?

Thank you in advance

Karanka

Hi, thank you for the reply! yes, it is a transient model, I set the initial time step equal to 1 day but I saw from the time steps chart that the actual value is below 1 (about 1e-07d!!!!).

Hi, I am trying to simulate an unconfined model characterized by 4 layers with 2 Hydraulic head BC, 1 Cauchy BC and 5 multilayers wells: the simulation is too slow!

What could be the problem? and what I could trying to change?

Thanks

Karanka

Hi Carlos, I have the FeFLOW 6.2 version (p8) but I can not find these new feature! where is it? What is the name of the plug-in?

Thanks again

Karanka

Hi Carlos thanks for the information!!! I just saw the post.

I would to know if there is a manual/report related to this new updating or other informations for understand this new tool.

Thanks again,

Karanka

Hi Carlos thank you very much for your useful response!

I will try the second option that you say or the implementation of a complete budget calibration via IFM. In this case
I need a plugin of this type! I wanted to know if you knew of its existence.

Thanks again

Karanka

Hi there, I have a problem. I should calibrate a model in PEST relative to a mountain area where I don't have piezometric data available.

I have data relative to the hydrograph spring of the only spring present.

I would to know if is possible introduce a hydrograph spring in PEST (trough a transient simulation) and in positive case how I can make it.

Thanks in advanced

Karanka

Hi udju, thank you for the answer. I have another question: if I consider the spring as a constant head boundary then how do to insert the constraint that you say? because the FEFLOW allows me to insert a constraint related to the min/max discharge value of the spring.

Thanks

Karanka

Hi, I wanted to know if anyone had any idea of how simulate the presence of a spring in a fractured aquifer; I have seen some papers that deal with springs such as wells: is that correct?

Thanks in advance for your reply.

Karanka