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


Message Boards

Grid Generation Reservoir

Julie Arteaga Carrera, modified 4 Years ago.

Grid Generation Reservoir

Youngling Posts: 1 Join Date: 3/14/16 Recent Posts

I am beginner in Delft 3D and I have had some problems with the grid generation of my reservoir. The shape is a little complex and i tried to do the splines following the shape of the lake, but when I generated the grid, I found the next message : Spaghetti; spline both in M and N direction.

Please, I would appreciate any help or procedure about the best way to create the grid .


Qinghua Ye, modified 3 Years ago.

RE: Grid Generation Reservoir (Answer)

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi Julie,

The spline lines are used to generate grid as the backbone-like. It should not be align with land boundary. You may refer to Delft3D RGFGRID User Manual, for example, Figure 3.12. Or you may follow one of the Delft3D training courses, which might save you a lot of time to start a working model.

I hope this is useful.


Carroll Konopelski, modified 2 Months ago.

RE: Grid Generation Reservoir

Youngling Posts: 1 Join Date: 12/16/20 Recent Posts
Reservoir flow simulation involves subdivision of the physical domain into a number of gridblocks. This is best accomplished with optimized grid point density and minimized number of gridblocks especially for coarse grid generation from a fine grid geological model. In any coarse grid generation, proper distribution of grid points, which form basis of numerical gridblocks, is a challenging task.