Chto

Hi Jeremie,

it sounds that your Problem is more a 2D - problem than a 1D - problem since flow seems to be distributed widely in a vast foreland.

Therefore I recommend to use the 2D - Software MIKE21FM. If necessary, MIKE11 - branches can be coupled to the MIKE21FM - it is then called MIKE FLOOD. The coupling should be done, if you have many discrete branches in your model and the floodplain is flooded with well known most likely flow paths.

But, if you can numerically effort resolving your branches in an unstructured mesh, please use the adequate software.
Everything else is an extreme simplification of the natural conditions an should be avoided if possible.

Bests Christian

Hi Stefan,

have you selected all nodes of your FEFLOW - model before doing a copy & paste ?
You can do a complete node selection in the 3D - View and then press CTRL - A.
It should work then.

Bests Christian

Hi Aileen,

please check, if the box INLAND FLOODING in the menu module selection is checked.

Bests Christian

Hi,

first: you should think about, if handling 3000 element selections is practicable for calibration.

I would suppose:
Add a field selection ID to your polygons.
You can turn your polygons into an element distribution and use this field as value.
After that you can access the element selections quite easy by selecting your appropriate ID.
By using the Expression Editor, you can even use the element distribution to assign values or Change values during calibration.

Hope that helps.

Bests Christian

Johanna,

if you are not interested in flooding the quay, you can take the "quay" elements off the mesh.

If you are interested in flooding, you have to refine your mesh, that one element face represents the bottom of the quay and another element face represent the top of the face.
In general, it is not possible to reflect vertical structures in your 2D - mseh. That means, that your wall is no longer vertical, but - depending on the mesh refinement - slightly inclined.

Third method is to use structures - for example weirs. However, you can only simulate the flow upstream and downstream of structures, but not the flow directly inside the structure.

Thus, I would recommend to refine the mesh to reflect the structure in the mesh.

Bests Christian

Dear Tija,

please find the following parameter in the mike11.ini - File:

;HD-Variable no. 64
;  Output files may be flushed i.e. file header information updated.
;  A value of 1 indicates that the result file will be flushed every
;  time results are written to the file.
;  Default value for variable = 0 (no flushing)
;
;  File_Flush_Freq = 0
;

You can set this parameter to 1 and MIKE11 will flush all results directly to the file. You should then be able to open the result file, even if the MIKE11 crashes.
Please regard that, due to the flushing, the simulation will slow down.
Therefore, we recommend to use this parameter until your model is stable, and then, to accelerate the simulation, set this parameter back to 0

Bests Christian

Hi Cris,

do you mean: only the visualization changes ?? That means, the colors, line thicknesses and so on ??
The visualization should not change when scrolling through layers and slices. If so, please report that to support@mikebydhi.de

or do you mean: the values are changing ??
Since FeFlow is modelling 3D, it is very realistic, that the hydraulic heads change with the depth of the model. Especially, when you have different strata.
The hydraulic potential is therefore given for each depth (slice) and for each node.
If you want to find out the free water table, you have to evaluate the pressures - pressure = 0 means the groundwater surface.

The best method, to find out the groundwater surface in you pit is to do a cross section through you pit and plot the pressures in this cross section. You will find one check box zero isoline.
if you use the free and moveable approach, feflow's slice 1 i always the free groundwater surface, because of feflow adapts the mesh to the groundwater table.

Bests Christian

Hi,

please make sure, that your inflow boundary is wetted at the beginning of the simulation.
MIKE21 needs wetted inflow boundaries.

You can do that by setting appropriate initial conditions.

Bests Christian

Hi,

when does the error occur ?
When starting FeFlow or when staring the simulation ?

Bests Christian.

Dear sumit,

the source, where your elevation data comes from, doesn't matter. You have to convert your data into a dfs2 - File with elevations.
MIKE21 offers a possibility to convert ASCII Grids (ESRI ASCII GRIDS) into MIKE21 - dfs2 - Files with the MIKEZERO - Toolbox.

Otherwise you can create DEM directly in MIKE with the Bathymetry - Editor - please refer to the MIKEZERO Online Help.

Bests Christian