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

water level error in delft3d flow

glejin johnson, modified 5 Years ago.

water level error in delft3d flow

Youngling Posts: 11 Join Date: 6/9/13 Recent Posts

I am trying to simulate water level and tide induced current along the Indian west coast at Ratnagiri. I run the Flow model module for one month using water depths at MSL and visualize the results with Quick plot at a depth at 0.55 meter. The stimulated water level at 0.55m shows that the water level gives constant values at a value near to -0.70 meter during low tide period (when tide is going below this level). measured tide at the location is dominated with mixed semidiurnal tide varing between -2 and +1.5 meter wrt MSL (tidal range = 3.5 meter). water level and MDF are attached along with this.

Please help me to solve this..

Qinghua Ye, modified 5 Years ago.

RE: water level error in delft3d flow (Answer)

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Hi Glejin,

I didn't quite get your question. what is the results with Quick plot at a depth at 0.55 meter?

From the figure, I guess you probably want to say the simulated water level variation is not as large as the measured. Am I right?

So for this, there might be a lot of reasons, such as, the river discharge is too big which might damp the peak of tide at your measuring point, or due to bathymetry, and tidal prism volume is too small, etc.

Hope this will be a little bit helpful?