Denim Umeshkumar Anajwala

Deactivated elements do not exist in the model. Thus FEFLOW will simply NOT consider the deactivated part at all. It is treated as if it weren't part of the model. So you might have to put boundary conditions on the interface of the active and deactivated parts.

Here's the old video. The swf file in the zip archive can be opened by any web browser.

The zero isoline can be understood as the groundwater table. It should actually fit to the current hydraulic heads.

Thanks Soren. I guess that you're using the semi-analytic Eskilsson/Claesson method. With this, it should work perfectly fine through IFM. Applying the fully transient Al-Khoury approach, however, strictly speaking, the temperature values of the inflow / outflow pipes in the BHE would have to be switched when changing flow direction (which is not possible via IFM). Just changing the connection, the inflow pipe will stay the inflow pipe, rather than (as in reality) making the former outflow pipe the new inflow pipe. This will only affect the results during a very short period, though. So if you only switch seasonally, it should not pose a problem.

Indeed there is a relationship the other way round, too. While the head depends on discretization when using a Well BC, the flow will depend on discretization when using a Head BC.

Dear Anne,

The respective video was based on FEFLOW 5.x and therefore is no longer useful nowadays. Do you have a specfic question about the assignment?

Best regards,
Peter

It is, but it is much less so compared to the 'old' flow rate method.

Most unfortunately, this is currently not possible. I fully understand that this is how many systems are nowadays operated, and most probably there will be even more of these installations. We've put this on the wish list, but I cannot promise anything yet in terms of timing.

These are at least the most straightforward options.

Alternatively, if the lake water and groundwater levels influence each other (as groundwater is the only water source for the lake), you could also adopt a concept of simulating the lake by using a high-conductivity zone in the model (without and BC), or by using the plug-in IfmLake available from DHI-WASY that provides the possibility of simulating the lake as linked to the FEFLOW model.