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intro story DELWAQ

DELWAQ

DELWAQ is the engine of the D-Water Quality and D-Ecology programmes of the Delft3D suite. It is based on a rich library from which relevant substances and processes can be selected to quickly put water and sediment quality models together.

The processes library covers many aspects of water quality and ecology, from basic tracers, dissolved oxygen, nutrients, organic matter, inorganic suspended matter, heavy metals, bacteria and organic micro-pollutants, to complex algae and macrophyte dynamics. High performance solvers enable the simulation of long periods, often required to capture the full cycles of the processes being modelled.

The finite volume approach underlying DELWAQ allows it to be coupled to both the structured grid hydrodynamics of the current Delft3D-FLOW engine and the upcoming D-Flow Flexible Mesh engine (1D-2D-3D) of the Delft3D Flexible Mesh Suite (or even other models such as TELEMAC).

'DELWAQ in open source' is our invitation to all leading experts to collaborate in further development and research in the field of water quality, ecology and morphology using Delft3D. Feel free to post your DELWAQ related questions or comments in this dedicated forum space. If you are new to DELWAQ, the tutorial (in the user manual) is a good place to start. A list of DELWAQ related publications is available here.

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Sub groups
D-Flow Flexible Mesh
DELWAQ

Cohesive sediments & muddy systems

 


Message Boards

RE: vegetation module for a partially vegetated channel

XC
XIAOCHEN CHEN, modified 2 Years ago.

vegetation module for a partially vegetated channel

Youngling Posts: 1 Join Date: 5/3/15 Recent Posts
Hi there,
I am currently trying to model a channel with vegetation with Delft3D: the vegetation width is 2/3 of the channel width. The model itself runs smoothly however the model result seems no as good as I expected. The flow velocity in the vegetated area is quite similar as the flow velocity at the open channel (non-vegetated area), and velocity difference is only 0.5 cm/s. However, from the experimental data there is larger velocity difference between the vegetated flow and open channel flow, around 10 cm/s. It seems that the vegetation do not have a 'blocking effect' to slow down the flow in the Delft3D model. Can anyone help me with this problem? I attached my vegetation input file with this post also.

By the way I also try to model the channel fully covered with vegetation, but the result is quite good and quite similar with the measurements. Thanks!


Xiaohchen
SM
shabnam mirheidarian, modified 1 Month ago.

RE: vegetation module for a partially vegetated channel

Youngling Posts: 2 Join Date: 7/29/19 Recent Posts
hi, I wanted to model a vegetation patch with diameter 10 cm in a flume with 1 m width, I have the same problem and

The flow velocity in the vegetated area is quite similar as the flow velocity at the open channel (non-vegetated area), I wanted to know could you find the problem or not?