intro story D-Flow FM


D-Flow Flexible Mesh

D-Flow Flexible Mesh (D-Flow FM) is the new software engine for hydrodynamical simulations on unstructured grids in 1D-2D-3D. Together with the familiar curvilinear meshes from Delft3D 4, the unstructured grid can consist of triangles, pentagons (etc.) and 1D channel networks, all in one single mesh. It combines proven technology from the hydrodynamic engines of Delft3D 4 and SOBEK 2 and adds flexible administration, resulting in:

  • Easier 1D-2D-3D model coupling, intuitive setup of boundary conditions and meteorological forcings (amongst others).
  • More flexible 2D gridding in delta regions, river junctions, harbours, intertidal flats and more.
  • High performance by smart use of multicore architectures, and grid computing clusters.
An overview of the current developments can be found here.
The D-Flow FM - team would be delighted if you would participate in discussions on the generation of meshes, the specification of boundary conditions, the running of computations, and all kinds of other relevant topics. Feel free to share your smart questions and/or brilliant solutions! 


We have launched a new website (still under construction so expect continuous improvements) and a new forum dedicated to Delft3D Flexible Mesh.

Please follow this link to the new forum: 

Post your questions, issues, suggestions, difficulties related to our Delft3D Flexible Mesh Suite on the new forum.





Sub groups
D-Flow Flexible Mesh
Cohesive sediments & muddy systems


Message Boards

Results generation and calibration

Mathanki Sivapatham, modified 2 Years ago.

Results generation and calibration

Youngling Posts: 16 Join Date: 1/20/16 Recent Posts
My QUICKPLOT is not working and I would like to know if there are any other tool/method for me to obtain my results.
Thank you!
Erin King, modified 2 Years ago.

RE: Results generation and calibration

Youngling Posts: 12 Join Date: 10/5/16 Recent Posts
There are a number of Delft3D Matlab tools available which can help you interrogate the output files easily.
I think the link below is the link to the delft3d_matlab tools in the open earth tools repository.

For example, to extract the water level results from observation points in my FLOW domain (from the *.trih file) I use:



Stations = qpread(fid, trih(3), 'stations');

for k=1:N
model.(sprintf('%s',Stations{k})) = qpread(fid, trih(3), 'data', 0, k);

This outputs a matlab structure with all of the stations containing water levels and times. You can change the index after trih(N) to change the variable you wish to output.

Hope this helps,