intro story Lake


Lakes and reservoirs are important resources for communities around the globe. They provide food, drinking and irrigation water and can also offer spots for recreation. Under certain conditions lakes can also represent a threat for local communities, such as flooding or limnic eruptions. The ecological state of shallow lakes may be hampered by suspended sediments due to wind driven currents and waves. In deep lakes, stratification can cause undesirable anoxic conditions in the deeper areas. Understanding these systems is crucial to enable a sound management of these water bodies.

Delft3D is the state-of-the-art modelling framework for hydrodynamics, water quality, ecology, waves and morphology.
Here, in this space, we share knowledge & experiences, and discuss issues related to modelling of lakes.






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


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Problem with layers in delft3D

alessandro gerevini, modified 3 Years ago.

Problem with layers in delft3D

I'm trying to run a model with 7 layers in grid parameters, with sediment transport and tidal boundaries. The model can run, but when I watch the results, the velocity or water level are equal to zero after a few time step. I'm trying to set different forcing type of flow conditions (time series and astronomic), but the result doesn't change.
With only a one layer the model run without problem.
I think there are some parameters to add or change.
Thank you

Alessandro Gerevini
emmasmithdc Smithcdas, modified 11 Months ago.

RE: Problem with layers in delft3D

Youngling Posts: 3 Join Date: 5/9/20 Recent Posts
Thank you so much for this. I was into this is sue and tired to   tinker around to check if its possible but couldnt get it done. Now that i have seen the way you did it, thanks guys
Henderson Charlotte, modified 11 Months ago.

RE: Problem with layers in delft3D

Youngling Posts: 1 Join Date: 5/16/20 Recent Posts
If you are talking about the option called "Online coupling for WAQ" in the FLOW-GUI, I already tried that via the menu and via console, but unfortunately it didn't work out. I am using the open-source-version of Delft3D. My *.mdf-file has the flag "Waqmod = #Y#" and the times for writing the communications-file specified mcdvoice login