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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

3D wav and rectangular grids

MV
mercy varghese, modified 7 Years ago.

3D wav and rectangular grids

Youngling Posts: 17 Join Date: 8/6/13 Recent Posts
Hi

Does Delft 3D Wav work if I use rectangular grids????
In the manual it is not mentioned as only curvlinear grids..... but wherever grids are mentioned, even in the file extension table it specified as curvlinear grids.
Can I use Rectangular grids for wave computation...???
I know I'm being pretty stupid but please bear with me as I don't know much of modelling and just studying about it

Mercy
U
Arnold van Rooijen, modified 7 Years ago.

RE: 3D wav and rectangular grids (Answer)

Hi Mercy,

Yes, you can definitely use rectangular grids in Delft3D. There is actually a rather easy option in RGFGrid to create a rectangular grid ('Operations'/'Create rectangular or circular grid...').

Cheers,
Arnold
MV
mercy varghese, modified 7 Years ago.

RE: 3D wav and rectangular grids

Youngling Posts: 17 Join Date: 8/6/13 Recent Posts
Hi Arnold,

Thanks for replying.......

I'm having some difficulty in creating circular grids. what I have is a .ldb file of India which was created using .shp file from ArcGIS using QUICKPLOT.
I'm not understanding what should be radius of curvature and centre of the grids so that I get my circular grids. I'm interested in 15N:5N 78E:82E (South east India)
Why I want to go for circular grids is that the outer grids will be of larger spacing and will reduce in sizeas it nears to the coast.

I'm attaching the .ldb file

Mercy
U
Arnold van Rooijen, modified 7 Years ago.

RE: 3D wav and rectangular grids (Answer)

Hi Mercy,

To be honoust I have never created a circular grid via that option. What I normally do is creating some splines and then via 'Operations/Change splines into grid'. In that way you can quite rapidly create a grid that is coarser at the offshore boundary. You will then have to make sure that your splines have more distant in between in areas where you want less resolution.

If you still want to use the above mentioned option, I would have a look in the manual section 5.3.5 (if you haven't done yet). But I'd recommend to use the splines to grid option. There is some examples availbale in the manual (e.g. fig 3.14 and 3.15).

Hope this helps

Cheers,
Arnold
MV
mercy varghese, modified 7 Years ago.

RE: 3D wav and rectangular grids

Youngling Posts: 17 Join Date: 8/6/13 Recent Posts
Arnold,

Hi! Yah I tried making the grids with the splines. the model is working quite well. Thanks for replying

-Mercy