intro story Lake

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.

 

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D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems


 

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Max depth that I can use with Delft3D

VT
VIRGINIA TORDABLE, modified 7 Years ago.

Max depth that I can use with Delft3D

Youngling Posts: 12 Join Date: 11/26/13 Recent Posts
Hi,

I'm trying to simulate a study in Canary Island.
I want to start with a big area (around the 6 island) and then i want to nest 3 or 4 times to reduce my area to the Tenerife coast.
For the biggest area max depth is around 4,000 m and finally the smallest area has a depth of 2,000 m.

I'd wanted to know if it is possible to use those values for depth, because some of the error that I have found when I've simulated this case are:
- velocity changes too high
- depth changes too high

I have found that the model can be used in shallow water and coastal areas, my teachers told me I can use this program for my thesis, but now I am not sure about that.

Thanks so much.
AA
Anonymous Anonymous, modified 7 Years ago.

RE: Max depth that I can use with Delft3D (Answer)

Jedi Master Posts: 333 Join Date: 7/30/20 Recent Posts
Hi Virginia,

The value of the depth shouldn't be an issue.
How did you set up your model? (2D, 3D, sigma, z-layered, resolution, timestep, ...)

This post is somewhat related to your issue: here.
VT
VIRGINIA TORDABLE, modified 7 Years ago.

RE: Max depth that I can use with Delft3D

Youngling Posts: 12 Join Date: 11/26/13 Recent Posts
Hi Christophe,

thanks so much!

That explanation could be useful for my case.

Now, I'm working in 2D, but later I'd like to work in 3D.

I'm trying to use CFL=1, in these case, with my cell size (2x2km), I should work with Time step=0.1, but when I run the simulation at 30-40% I always find this error.

I'm going to have a look to the other post.

Thanks again
AG
Ami ghost, modified 1 Year ago.

RE: Max depth that I can use with Delft3D

Youngling Posts: 1 Join Date: 2/17/20 Recent Posts
Interesting stuff to read. Keep it up.
EJ
Evelyn Jonas, modified 11 Months ago.

RE: Max depth that I can use with Delft3D

Youngling Posts: 1 Join Date: 4/5/20 Recent Posts
Pol files based solely on roughness type would be an enormous hassle and very time consuming TellPopeyes.