User Forum of Software BASEMENT / Output

maximum values on Stringdefs

dummy@example.com (Matthias Bürgler) — Mon, 03 Aug 2026 07:47:59 +0000

Ciao Lukas

Thanks for the specification. I think this is feasible and hopefully, we can include this in the next release.

Best regards,
Matthias

maximum flow velocity vector in FloodVar

dummy@example.com (Matthias Bürgler) — Wed, 29 Jul 2026 06:52:56 +0000

Hi Lukas,

Thanks for the suggestion. I'll see if we can implement this.

Best regards,
Matthias

flood tracking and re-run

dummy@example.com (Matteo Facchini) — Fri, 14 Nov 2025 11:48:01 +0000

Nope, it just adds the new ones to the old ones!

no data flood tracking

dummy@example.com (Matteo Facchini) — Wed, 05 Nov 2025 08:13:53 +0000

dear all
we just noticed that the output format for the flood module under version 4.2.0 fills the no data cells with the value -9999.
this compromises to some extent the visualization of the flood_tracking_* results at least in paraview.
Cheers
Matteo

results binary: Reading results from file failed

dummy@example.com (Matteo Facchini) — Mon, 18 Aug 2025 15:22:40 +0000

same here on windows, both with the GUI or from the command line.

xdmf error in QGIS with "transport_capacity_abs" output

dummy@example.com (Matthias Bürgler) — Fri, 28 Jun 2024 05:50:58 +0000

Due to a bug, the "transport_capacity_abs" is written incorrectly to the .xdmf File when more than one grain size class is used, resulting in the file being unreadable by QGIS.

A workaround is to use the "transport_capacity" output and calculate the magnitude of the transport capacity vector during the post-processing.

Regards,
Matthias

problem when exporting results

dummy@example.com (Matthias Bürgler) — Wed, 12 Jun 2024 09:44:18 +0000

Does the XDMF file have the correct structure?

BMv4NodestringResults.py

dummy@example.com (Matthias Bürgler) — Wed, 12 Jun 2024 09:42:37 +0000

Note: Meanwhile BASEMENT allows for up to 200 nodes per nodestring.

xdmf

dummy@example.com (Matthias Bürgler) — Wed, 12 Jun 2024 08:01:19 +0000

Hi Stefano,

One issue that I recently noticed is, that if you define the same output variable (e.g., water_depth) twice in the simulation.json, then QGIS cannot open the XDMF file.

Could this be the reason? If you can send the the complete test case that results in the problem, I will have a look.

Best regards,
Matthias

Python script

dummy@example.com (Stefano) — Tue, 21 May 2024 08:07:30 +0000

Hi Matteo,

thanks for your interest, but I solved my problem simply following more accurately the installation step in tutorial.

Basement 4.0 xdmf problem

dummy@example.com (ClaireGilder) — Tue, 19 Dec 2023 21:19:47 +0000

I am having the same problem with the xdmf exported after running BASEMD. I cannot add the mesh to QGIS, even after changing the header as noted above. The xdmf from the BASEHPC model I ran to double check does not have this issue. That is, I can visualize the results from BASEHPC.

QGIS and gdal cannot read xdmf and related data

dummy@example.com (Matteo Facchini) — Thu, 17 Aug 2023 09:38:42 +0000

Ciao Lukas!
The change was suggested also in this topic
Take care
Matteo

Missing tag "flood_tracking" / use of "tracking_timestep"

dummy@example.com (Matthias Bürgler) — Mon, 05 Jun 2023 15:49:59 +0000

The flood tracking feature results in additional computation cost. Increasing the tracking_timestep provides the option to reduce this cost costs. If you want the tracking to occur at every computational time step you can just set a tracking_timestep that is clearly smaller than the expected computational time step.

Note that defining a tracking_timestep smaller than the computational time step will not affect the computational time step. The latter is purely defined by hydraulics, cell size and the user-specified CFL number.

QGIS crash

dummy@example.com (NumericalSam) — Mon, 27 Mar 2023 06:08:09 +0000

Hi there

I've been using a Linux machine for simulation and transferred the simulation folder to my Windows machine. When creating the xmdf in the GUI, I'm often not able to load the results in QGIS, it crashes almost immediately when selecting the xdmf file.

Did anyone experience this too?

@developers Are there differences in the data structure of results on Linux compared to Windows? Or are the files of the exact same structure and interchangeable?

Best regards,
Sam

Output of Chezy friction coefficient

dummy@example.com (Irene Samora) — Wed, 22 Feb 2023 14:53:30 +0000

Hello all,

I would like to confirm the output "friction_chezy".
In the manual it is described as "Dimensionless squared chezy friction coefficient [-]". Therefore, it is cf^2, i.e. (C/sqrt(g))^2.

Is this correct ? The magnitude of my results match more a C^2 and I'm wondering if it is my model that has a problem or if there is a units missmatch.

Thank you in advance !