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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

Toggle Boundaries on/off over simulationtime?

TK
Tim Kerlin, modified 1 Year ago.

Toggle Boundaries on/off over simulationtime?

Youngling Posts: 2 Join Date: 5/11/17 Recent Posts

Hi Guys,

 

I am working on a 3D-model (around 5000m long x 250m wide) of a river with a dam. The dam contains 22 radial-gates which are opened upwards. The gates are operated seperatly and somehow i need to pay attention to that because i want to look at the morphology later. Because of the different operation of the gates there are different eddys etc. which will affect the sedimentation...

 

I am using the sigma-model.

The upper boundary is total discharge.

 

The lower boundary is giving me a headache. I already tried:

1. Discharge per cell. So i could just give the lower layers some discharge and "operate" the gates like that. I also inserted a side boundary - waterlevel - otherwise the model collapses ofc. Furthermore the "openening" of the gates is affected by the waterlevel (layerthickness changes due to the sigma-model). So this was no "clean" solution for my problem... 

 

2. Right now I am working with following constellation (please see the attached picture):

Each gate is 1 boundary - waterlevel time-series. The gates are diveded by thin dams. And just at the beginning of the cell I inserted a barrier which is opend at the ground. This is working well and right now I am quite happy with the solution. 

 

The issue is the management of the gates. I am looking for a function to toogle the boundary off when the gate is not used... Or to close the barrier timedepending.

I think I can work with this model when I just simulate the time till 1 gate is opened/closed and from there I take the restart-file till the next gate is operated. But this will be really time-consuming because I will simulate 3 years...

 

Maybe anyone has a nice idea... Or any other workaround. 

I hope the problem is descriped understandable.

Thank you for every answer,
Tim

Richard Measures, modified 1 Year ago.

RE: Toggle Boundaries on/off over simulationtime?

Jedi Knight Posts: 178 Join Date: 3/23/11 Recent Posts

Hi Tim,

I think RTC-Tools might be what you are looking for. I built a model with gates in using them a few years ago and I think they are now open source. See this post https://oss.deltares.nl/web/delft3d/general1/-/message_boards/message/300100?_com_liferay_message_boards_web_portlet_MBPortlet_showBreadcrumb=false which was my initial inquiry. I'd suggest doing some digging and seeing if the open-source RTC-Tools can do what you need (or hopefully someone else on here may have more recent experience/knowledge and can provide more detail...)

Good luck,

Richard

TK
Tim Kerlin, modified 1 Year ago.

RE: Toggle Boundaries on/off over simulationtime?

Youngling Posts: 2 Join Date: 5/11/17 Recent Posts

Hi Richard,

 

thanks for the hint. RTC sounds promising. I ll give it a try.

 

Regards,
Tim

LE
lerneini edstein, modified 5 Months ago.

RE: Toggle Boundaries on/off over simulationtime?

Youngling Posts: 2 Join Date: 12/19/19 Recent Posts
Richard Measures:

<p>Hi Tim,</p>
<p>I think RTC-Tools might be what you are looking for. I built a model
with gates in using them a few years ago and I think they are now open
source. See this post <a
href="https://oss.deltares.nl/web/delft3d/general1/-/message_boards/message/300100?_com_liferay_message_boards_web_portlet_MBPortlet_showBreadcrumb=false">https://oss.deltares.nl/web/delft3d/general1/-/message_boards/message/300100?_com_liferay_message_boards_web_portlet_MBPortlet_showBreadcrumb=false</a>
which was my initial inquiry. I'd suggest doing some digging and www.Krogerfeedback.com
seeing if the open-source RTC-Tools can do what you need (or hopefully
someone else on here may have more recent experience/knowledge and can
provide more detail...)</p>
<p>Good luck,</p>
<p>Richard</p>

Its really worked well for me. Thanks for the awesome solution.