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

Error in Quickplot when exporting wave height as a shapefile (.shp)

Hannah Snow, modified 5 Years ago.

Error in Quickplot when exporting wave height as a shapefile (.shp)

Youngling Posts: 3 Join Date: 9/3/15 Recent Posts

I am having a problem when I try to export contour lines of sig wave height as an ARCview shapefile. I want to be able to overlay wave heights on my basemap in ARCmap GIS. I can successfully export my grid and import it into GIS, but when I try to export wave height I receive the following error:

Catch in d3d_qp\exportdata
Invalid number of columns in XY
In private\shapewrite at line 92
In private\qp_export at line 609
In d3d_qp at line 1611

In the Quickplot settings, I have selected the full M and N range, X-Y Axes type, contour lines in a single color, and have left all other default values (clipping values, line width, thresholds, etc.). The export file type is ARCview shape, as mentioned before. I have tried exporting with an X-Y-val Axes type, and this will export successfully, but I receive an error when trying to import into GIS.

I am using DELFT3D 4.01.00 for Windows

Please let me know if anyone knows how to export wave heights in a way that is GIS compatible.