intro story 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.




Sub groups
D-Flow Flexible Mesh

Cohesive sediments & muddy systems


Message Boards

Question about the input parameter for porous

Kazuhiro Tsubono, modified 6 Years ago.

Question about the input parameter for porous

Youngling Posts: 11 Join Date: 7/5/13 Recent Posts
Dear all,

I have a question about the input parameter for a porous plate, "Friction coefficient of the quadratic friction".
According to the flow manual, I understand this as closs-U.
I calculated the parameter based on the equation (10.71) and obtained a value of 10^-1 order.
Each values are the below.
g=9.8 m/s^2, deltax=10 m, Um,n=0.02 m/s, kshi(u)-kshi(d)= 0.00001 m.

However, the examples on B.3.3 Porous Plate demonstrate values of 800 and 1000.
These values seem way too much.

Could you help me understand in what kind of case these large values come up?
Also, please correct me if my understanding toward the input parameter for a porous plate is wrong.

Thank you in advance