2.2.4 Water Quality simulations

Different (depth varying) values for processes parameters - WAQ

2023-03-10T08:45:08Z

Good morning!

I work on a seawater modelling project, trying to simulate pollution.

Through the determination of "process parameters" I try to provide depth varying values for several parameters (degradation rate constants).
When selecting "data properties", the window selection regarding "depth (constant/depth varying)" is freezed, giving no options for any selection.
On the contrary, i have this option (depth varying) when dealing with open boundaries..

Do you have any relevant experience to solve this problem? Should I create a dedicated file with the desired values (segment function, quickin data file) or is there a simpler solution. I just need to provide different values over some of the layers.

Thank you in advance for any replies!
Have a great day!

KM

RE: Flow with spatial varying temperature, salinity and tide

2023-03-06T15:10:10Z

Hi,
To my understanding, you want to apply temporally varying constituents (tides, salinity, etc.) at each grid (means spatially) at the boundary.
I did not have any test cases for this. But I think this can be done by creating one boundary line for each grid, manually or using Delft Dashboard.
After that, you can generate the (time-varying) tides in Delft Dashboard (https://publicwiki.deltares.nl/display/DDB/Download).

For other constituents (salinity, temperature), I had no experience other than generating the input manually or nested from a global model.
Hope this help.

Thanks, Munawir

Flow with spatial varying temperature, salinity and tide

2023-03-06T11:45:53Z

Dear all,
I am new to this model. I did an experiment with tide (using BCA), which is giving constant tide at boundary. Can I give spatial (at every grids in the boundary) and temporal (hourly) varying boundary at the Open boundary grids? I am planning to include temperature, sanity and water level (tide) at boundary. Did anyone tried such cases ? Could please help me by sharing some test cases if you have.

Thank you

Jishad

Bloom sediment diagenesis modeling setting

2023-01-30T04:50:20Z

Currently, multiple layers of sedimentary layers are being tested in rivers with ideal square grids.

There is a lack of information on this, so even if an error occurs, it cannot be solved.

The flow model was operated normally, and when the water quality model (Bloom) was set after coupling in the flow model, the model was operated normally.
The output of the result was no problem.

However, when applying multiple layers of sedimentary layers, an error occurs and the model does not rotate.
The inf file is as follows.
1) Bloom test: 50×10.inp -> Normal operation
2) Multi-layer test: 50x10_multilayer.inp -> model error man.

How can I modify the input so that I can be a model?

If you don't mind, I would like you to revise the input and give me an answer.

p.s
1)Currently, I'm running a model on a Linux-based computer through the 7545 version.
2)Send the .inp file of the relevant model found in the forum together.
3)Due to capacity problems, the model result file and the coupling result file are deleted and uploaded.
Coupling made a coupling result file through PLCT.

RE: No result from addition of UNIFORM WASTE LOAD FROM BED

2023-01-25T09:51:49Z

Hello Lora,

Yes, the model is 3D.

The bed load is applied to the bottom-most layer (using the option "uniform waste load at bed" at the discharges tab in the WAQ GUI).

The waste load you see at the different layers are from the discharge points (representing rivers), so they are not applied to the whole grid/bed. The waste load from rivers are distributed vertically as well according to the depth of the river (so they are not just at the surface).

RE: No result from addition of UNIFORM WASTE LOAD FROM BED

2023-01-25T09:34:17Z

Hi Lara, I see you have waste loads applied at multiple layers. Are you using a 3D model? Is the bed load applied in the bottom-most layer? I'm not sure what happens if you try to apply a bed load somewhere half-way in the water column but it is an easy test to try.

No result from addition of UNIFORM WASTE LOAD FROM BED

2023-01-23T05:27:13Z

Trying to set up a waste load from the bed but it doesn't seem to work. Any value and combination, high flow or high concentration do not produce new results from a run without the waste load. Attached the *.scn file, values there are just to test the option to add a uniform waste load from the bed. Am I missing something?

i want modeling delft3d WAQ and sediment diagenesis modeling setting

2023-01-20T15:00:11Z

Currently, water quality models are being set up through BLOOM at Delft3d WAQ.

Is "Delft3D4" or "Delft3D Flexible Mesh" that you mentioned in the mail different from the existing Delft3d WAQ?

If there is no big difference, I don't think it will be difficult to set up a model.

My purpose is to simulate water quality models and interactions in sedimentary layers and attributes in sedimentary layers.

In other words, it is intended to simulate changes in water layers C, N, and P according to the effects of C, N, and P simulations in water layers and C, N, and P simulations in sedimentary layers on water layers.

To simulate this, any model setting method that can be simulated is welcome.

However, even if you look up the manual and forum, there is no information on this.

If there is anything related, please reply quickly.

It's really desperate.

delft3d WQ model and sediment diagenesis modeling setting - V2

2023-01-20T01:05:17Z

Dear. Deltares

I am now using the bloom module for the delft3d water quality model.
In addition, we intend to add a sediment attribute mechanism to the water quality model.
However, it was confirmed that there was no manual for this.
Currently, it is too difficult to set up a model.
It will be difficult, but I need help.

Therefore, I am sending you an email to see if I can get a sample model file for reference.

If it is difficult to provide a model, I would like to receive it in any form, whether it is a separate manual, video, or reference for the methodology.
Please.

delft3d WQ model and sediment diagenesis modeling setting

2023-01-19T10:55:13Z

dear deltares.

I want to simulate C, N, and P together in the sedimentary layer in the water quality model now.
The water quality model was constructed through 'Bloom'.
When I looked up the manual and forum questions, I found that the S1/S2 method, the SWITCH module, and the third other method were used.
I don't currently have any knowledge of methods such as building input data and setting models. Therefore, I would like to see samples or manuals for reference.
If you have one, please send it to me.

I am sending you an e-mail because the p.s forum did not register questions. I want you to reply by email.

RE: Incorrect unit when input sediment results from FLOW into WAQ

2022-11-10T12:35:17Z

Sure.
zhuxian9459@gmail.com
Cheers

RE: Incorrect unit when input sediment results from FLOW into WAQ

2022-11-10T12:25:03Z

Hi!
After reading your post, I has a lot of harvest. I look forward to having further communication with you and makeing progress together.

In order to communicate effectively, I leave my email address or you can leave your email here. Looking forward to hearing from you!

Email: wz_water@sina.com

RE: Incorrect unit when input sediment results from FLOW into WAQ

2022-10-27T05:50:08Z

BTW, this is also a method to realise any parameter needed to be space varying and time dependented in the WAQ.

RE: Incorrect unit when input sediment results from FLOW into WAQ

2022-10-27T05:47:45Z

Just fixed this problem. I am sharing a method to fix this problem in case anyone is under a same situation.
1. Read the results of sediment from the flow and multiply 1000;
2. Writing the revised values into the 'com-xxx.dat' file, use the 'vs_put' in matlab. You can choose any parameter to cover its orginal values, but remember the parameter you choose. For example, choose the 'salinity' and cover the data of 'salinity' with the data of revised sediment concentration data.
3. Coupling the 'com-xxx.dat' and get the 'com-xxx.sal' file. This file used to be the data of salinity, but you have revised the data by SSC, so right now its values acctually representing the SSC.
4. Reading the 'com-xxx.sal' in the WAQ by segment function.
5. Checking the results of SSC by running the WAQ model

File .lst missing, not created

2022-10-13T14:05:17Z

Hi all,

I'm starting to work with Delft3D-WAQ. I runned the coupling (it finished ok), created the substances, defined the input, but when trying to run WAQ(1), I get an "unknown signal" as an error message. So verifying the coupling in the reports, I noted the file ".lst" was not created by the coupling processes, it is missing. Still in the reports, when trying to check the input file, the message is also the ".lst" file could not be found. Please, could someone help me. Why is this file not being created, what do I need to solve this problem? Thank you very much!

Incorrect unit when input sediment results from FLOW into WAQ

2022-09-09T06:56:49Z

Hi there,
I am trying to modelling the adsorption of phosphate by sediment in an ideal estuary.
When I tried to input the results of sediment from FLOW into the WAQ, I found that the values of sediment are remained but the unit changed from kg/m^3 to g/m^3. This decreases the order of the value of sediment by 10^3 in WAQ.
I am wondering that is there any ways that I can just increase the results of sediment in FLOW by 10^3 and then input into the WAQ.
I don't want to simulate the sediment processes in WAQ independedly because it cannot consider the feedback of sediment to the flow.
It well be great if anyone can offer some advice, thanks!!!
Regards.

RE: DELWAQ simulation time approximation

2021-11-30T09:01:00Z

Suzanne Fritsch
DELWAQ offers intricate calculation algorithms that allow you for example to split up a measured value of total nitrogen into the modelled substances PON1, NH4 and NO3;deal with different location names in the input data and your model: you do not have to carry out cumbersome “search and replace” actions.

Thanks for your answer but my concern is that whether the calculation time will increase significantly if I include more processes and substances (for example BOD or algae)

RE: DELWAQ simulation time approximation

2021-11-30T08:56:03Z

DELWAQ offers intricate calculation algorithms that allow you for example to split up a measured value of total nitrogen into the modelled substances PON1, NH4 and NO3;deal with different location names in the input data and your model: you do not have to carry out cumbersome “search and replace” actions.

DELWAQ simulation time approximation

2021-11-17T10:53:36Z

I've set up an estuarine hydrodynamic model with Delft3D (rectangular grid) which I will use for D-WAQ simulation.
Specification:
+ Grid dimension 242x284.
+ Hydrodynamics time step: 0.2 min.
+ Simulation duration: 1 month.
For D-WAQ, I want to simulate DO, NH4, NO2, NO3.
I understand that how fast I can calculate the result is relative to PC spec (I7 9700K 3.7GHz , 32GB RAM). For me, the FLOW simulation took about 2 hours to complete (Single core).
My question is:
1/ How long would it take for me to run the simulation in D-WAQ with the minimum step of DelWAQ is 1-hour interval result? just approximation is good
2/ Would the computation time vary significantly (for one-month simulation just like hydrodynamics) if I include more processes in the D-WAQ besides these substances?
Thanks!

Delft3D-WAQ publications?

2021-10-22T12:19:42Z

Hi all,

Where can I find a list of relevant Delft3D-WAQ publications? I thought I saw one at this forum once, but it isn't available now.

Regards,
Dmitry