Modelling Rivers

River

Rivers are natural water courses. They have vital contributions to the social and economical welfare of societies living along their course. They provide continuous, usually dependable, flow and supply of water. Accordingly, centralised civilisation began emerging independently along number of river valleys; e.g. the Nile, Tigris and Euphrates, the Indus and the Yellow Rivers. Since then, mankind has been in continuous struggle to understand and live in harmony with this gift/force of nature. Modelling rivers is the modern way to understand their behaviour and is an essential tool to tackle several river problems.

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 rivers.
 
 

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


 

Message Boards

Vegetation Point Model

AP
Ari Posner, modified 8 Years ago.

Vegetation Point Model

Padawan Posts: 31 Join Date: 5/2/11 Recent Posts
Is there an update on how to use the Veg. Point Model?

Does developing the trachytope representation not impact flow in a 3D model?

Thanks,
ari
Adri Mourits, modified 8 Years ago.

RE: Vegetation Point Model

Yoda Posts: 1224 Join Date: 1/3/11 Recent Posts
Hi Ari,

The documentation is not yet updated with respect to the Vegetation point model. I'm sorry for that.

Attached are two example testcases. Does that help?

Regards,

Adri

Attachments:

AP
Ari Posner, modified 8 Years ago.

RE: Vegetation Point Model

Padawan Posts: 31 Join Date: 5/2/11 Recent Posts
Adri,

Thank you! That is a huge help. I do have a few questions about your methodology.

Is this information used to adjust the roughness coefficient used, or how is it used in flow computation?

How are the plant arrays updated?

How would I estimate turbulent length scale between stems for shrubs? Do you have a reference paper for this computation?

Thanks Again,
ari
Qinghua Ye, modified 8 Years ago.

RE: Vegetation Point Model

Jedi Council Member Posts: 612 Join Date: 3/2/11 Recent Posts
Dear Ari:

They are good questions. Could you post them under the Bio-morphology topic?

Let me try to answer some of them.

Is this information used to adjust the roughness coefficient used?
Yes, for 2d. No, for DPMV.

How are the plant arrays updated?
In the trachytope representation and 3D DPMV, the vegetation array is not updated. But we recently have a vegetation dynamics model in Delft3D WAQ, which could provide time and space varying vegetation values and online coupled with Delft3D FLOW.

How would I estimate turbulent length scale between stems for shrubs?
Turbulent length scale is not estimated here, but by solving k-e eqations.

Hope it helps a bit...

Qinghua YE
JF
Jinghui Fan, modified 1 Month ago.

RE: Vegetation Point Model

Youngling Posts: 2 Join Date: 2/5/20 Recent Posts
Dear Ye,

I am also trying to use DPM to model vegetation impact in my model. I wanted to understand more about this model, so I was trying to find the source code of DPM. However, because of no instruction available for source code, I couldn't find it.

Could you tell me which source code file it is for DPM?

Sincerely,

Fanjinghui