2.2.1 Waves and Coastal simulations

XBeach wave simulation error

2023-07-15T21:18:30Z

I'm new to XBeach and I'm trying to learn by myself how the model works. Despite that I keep getting the same error again and again and really don't know why.

Quit XBeach since computational time implodes/explodes
Please check the velocities at the end of the simulation
dtref 1.12948787245309
par%dt 299.393819052059
An extra output timestep is created to inquire the last timestep
before an error occured

Salinity Modeling Questions

2023-05-03T15:42:29Z

Hello,
I am developing a salinity model in a region with very high evaporation rates. I am using an older version of the software that necessitates me prescribing the evaporation as a negative rainfall rate.

after several months of running, some areas in the simulation are showing values of 400+ PPT of salinity. I have tried to address this by modifying the dry cell threshold, which helps to some degree, but I am wondering if there are other tools for addressing this besides reducing the evaporation time series.

I see a value called "Sal0abovezlev" in the MDU file but when I try and change it, the model will not run.

Any thoughts?

Thanks,
Russell Nasrallah
United States Army Corps of Engineers

Export boundary condition file .bnd from DELFT 3D FM

2023-03-07T13:54:23Z

Hi everybody,
I reach to you because I use Delft3D FM for pre-processing my DELFT3D WAVES simulations. I create all the domain (grid, .dep and boundary), I can export .grd and .dep but I can't with the boundary file.
And when I tried to run in the software I have an error "Initialization of waves has failed".

The model and the error in attachment.

Thanks in advance for your help,
Soulayrol Mathieu.

Wavh file is not found

2023-01-17T06:46:14Z

I ran a coupled flow_wave model with 96 cores 48 per each on a cluster but the wavh file cannot be generated. However, when I used only one core for waves I got the wavh file without any problems. Did anybody face the same problem before and how did you solve it?

RE: Delft3D FM spatially varying meteo data

2023-01-03T10:49:32Z

To be more accurate: When I try to guess what it should look like, making a .hac-file and a separate grid in a .grd-file, I get the following error:
forrtl: severe (59): list-directed I/O syntax error, unit -154, file gridfile.grd

Delft3D FM spatially varying meteo data

2023-01-02T14:33:16Z

I'm working on model which needs spatially varying time series of meteorological data, i.e. a composite temperature model. I'm struggling to get the input of data working. The data would be relative humidity, air temperature and cloudiness, and the user manual suggests the use of .hac-files, but it doesn't open up the format. Could someone give an example of a working .hac-file, or any other working method to supply spatial meteorological data.
Best regards,
Henrik

RE: Delft3D FM Spatially Varied Winds - Remote process not available

2022-11-29T00:35:38Z

Dear Youngling,

Did you already solve this problem? I have the same warnings and I would like to know...

Thank You

RE: Really high velocitys in 3D sim. low waterlvl Error: conjugategradientS

2022-11-25T11:38:45Z

Update: After running a lot of simulations, I found that the error message no longer occurs when I change the Solver Type as follows:

Solver Type:
sobekGS + Saadilud --> sobekGS

The simulation runs through with the changed setting, but there remains an error in the model. The depth-averaged velocities become unrealistically high in some cases, in that cells where a dry cell is flooded. However, this error only occurs in the depth-averaged velocities. Because of this error, the error message probably appeared with the other solver. In the velocities of the individual layers the error with the high velocities does not appear at any time.

I would be glad if someone can enlighten me why these unrealistically high velocities partly occur when flooding a cell.

Thanks a lot!

Fatal error in wish "unable to alloc 84 bytes"

2022-07-15T22:13:11Z

Hello everyone I am simulating a wave coupled morphodynamic model in the 32 bit version of delft3D 4.01.00 on a 64 bit machine, however at 24 percent of the simulation the program crashes and stops until a certain time step , I would like to know if any of you have experienced this error and to know what is the problem with this error, I suspect it is due to compatibility problems of the machine with the software, I am running the program on a 16gb ram with a ryzen 7 processor

Merge two .dat files with different time sizes of simulations

2022-07-15T21:50:57Z

Hello everyone, I am currently performing a morphodynamic simulation coupled to waves during a year of simulation with a time step of one day.

The simulation reaches a point where it crashes, so I have decided to run the simulation from the moment it stops, I mean the simulation one called "trim_tumaco1.dat" that starts on July 1, 2019- until November 19, 2019 and simulation two "trim_tumaco2.dat" starts from November 19, 2019 and ends on July 31, 2020.

That said, I would like to combine the two simulations in order to obtain a single .dat file with the 397 time steps that I have defined.

Really high velocitys in 3D sim. low waterlvl Error: conjugategradientSAAD

2022-07-12T11:25:27Z

Hi,

I setup a model with Delft3D FM at a coastal area. In 2D everything works fine, but now I did the same simulation in 3D with 10 sigma layers. In every simulation i did in 3D simulation the same error occurs: conjugategradientSAAD. The simulation works for almost 4 days and then aborts.
I have noticed that the velocitys in the areas of low waterlevel are getting really high at some single points. The highest is like more than 200 m/s. You can see it in the attached picture. The problem with the high velocitys is espacially at the borders where the really low waterlevels are, you can see it in picture "error2".

I think I have to change some of the model settings. Maybe the numerical parameters or the advanced ones. So far I am doing all the simulation with default values. In 2D it worked fine.

Does someone know what to do and why this error occurs?

Variable sediment thickness

2022-02-18T17:16:26Z

Hello,

I am using Delft3D FM version 2020.02 and I am trying to run a morpho model with combined flows and waves.

The flow and wave module are running without issues. However, when I try to run the morpho module with variable initial sediment thickness, I keep getting this error:
** ERROR : RDMORLYR Error reading samples (not covering full grid) Sand_IniSedThick.xyz at location (x,y)=(175981.077,**********).

I have checked the grid and the *xyz points files multiple times and the grid is fully covered. I have tried building the variable thickness file using polygons, and points, and also filling the grid using the "overwrite where missing". When I check the model using the "validate" tool, it shows no errors. However, when I start the run I always get the above error.

Has anyone had a similar problem and could provide some guidance on how to solve this issue, please?

Thank you in advance for your time and help

Best regards,
Victoria

Delft3D FM Spatially Varied Winds - Remote process not available

2022-02-11T17:26:52Z

Hi there,

I recently added spatially varied winds in a .apwxwy file to my model and it has stopped running. I get the following errors when running the model on the GUI:

"Remote process not available / terminated during call Initialize"
"Remote process not available / terminated during call get_Messages"
"Initialization of FlowFM has failed."

I get the following .dia output from the filed run:

"** WARNING: MDU setting "Wrihis_temperature = 1" asks to write temperature to the output his file, but no temperature is involved due to MDU setting "Temperature = 0". So we set "Wrihis_temperature = 0" and do not write temperature to his file.
** WARNING: MDU setting "Wrihis_salinity = 1" asks to write salinity to the output his file, but no salinity is involved due to MDU setting "Salinity = 0". So we set "Wrihis_salinity = 0" and do not write salinity to his file.
** WARNING: readMDUFile: [general] guiversion=4.3.0.0 was in file, but not used. Check possible typo.
** WARNING: readMDUFile: [physics] effectspiral=0 was in file, but not used. Check possible typo.
** WARNING: readMDUFile: [output] wrishp_enc=0 was in file, but not used. Check possible typo.
** WARNING: readMDUFile: [output] waterlevelclasses=0.0 was in file, but not used. Check possible typo.
** WARNING: readMDUFile: [output] waterdepthclasses=0.0 was in file, but not used. Check possible typo.
** INFO : Opened file : FlowFM_obs.xyn
** INFO : Closed file : FlowFM_obs.xyn
** INFO : Initializing flow model geometry...
** WARNING: Could not read net cells from NetCDF file 'coarsegridorgo4.nc' (is not critical). Details follow:
** INFO : Opened file : FlowFM.ext
** INFO : setbedlevelfromextfile: Using bedlevel as specified in net-file.
** INFO : Done initializing flow model geometry.
** INFO : Finding flow nodes...
** INFO : done in 0.01600 sec.
** INFO : Start initializing external forcings...
** INFO : External Forcing or Initialising 'airpressure_windx_windy' from file 'new_wind.apwxwy'."

I am extremely confused, as it appears that none of the warning messages are critical and the winds are causing the failure. I only have winds in my model, no other forces or boundary conditions. Please help if you've had this issue! Thanks so much

RE: How to run a parallel computing on Delft 3D windows 10

2021-11-28T23:10:39Z

For windows you need to execute a parallel Delft3D Fm simulation using dimr. If you look in your delft install under plugins/deltasShell.Dimr/kernels/x64/dimr/scripts . There should be an example dimr_config_example.xml and run_dimr_parallel.bat.

How to run a parallel computing on Delft 3D windows 10

2021-11-06T15:40:39Z

Hello,
This is for my project. I would like to run a simulation, which is coupled between flow and wave in Delft 3D. Because of my large Simulation Area and i have 8 cores of cpu. I would like to running the flow calculation in parallel. I wanna try to use dd Flow simulation. Could you help me to give me hint to use it?