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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

How add a new input to a subroutine in processes?

Gholamreza Shiravani, modified 1 Year ago.

How add a new input to a subroutine in processes?

Padawan Posts: 65 Join Date: 6/25/16 Recent Posts

Dear D3D-Delwaq community,

I want to define a new variable as fine Sediment concentration in calsed.f subroutine. I see different IPs (IP(1)=IPOINT(1) to IP(12)=IPOINT(12)) which refferes to Input Parameters/functions/seg-functions. Then using PMSA-array the values of These IPs are assigned to variables (e.g.  N       = PMSA( IP4 )). The question is, when I want to define a new variable should :1-assign a new IP-number (e.g. IP(14)=IPOINT(14)) and then using PMSA(IP14), assigne the value to the new variable. Is it true that PMSA-function reads the Input data (.inp-file) and assigne the variables with the same name in processes variables the  predifined values in .inp-file? Moreover, the IPs do not show whether they are Input- or Output-variables, how can it distinguish between Input and outpout variables?