Coast / Estuary

Coastal systems are among the most dynamic physical systems on earth and are subject to a large variety of forces. The morphodynamic changes occurring to coastlines worldwide are of great interest and importance. These changes occur as a result of the erosion of sediments, its subsequent transport as bed load or suspended load, and eventual deposition. 
 
Estuaries are partly enclosed water bodies that have an open connection to the coast. Estuaries generally have one or more branching channels, intertidal mudflats and/or salt marshes. Intertidal areas are of high ecological importance and trap sediments (sands, silts, clays and organic matter).
Within the Delft3D modelling package a large variation of coastal and estuarine physical and chemical processes can be simulated. These include waves, tidal propagation, wind- or wave-induced water level setup, flow induced by salinity or temperature gradients, sand and mud transport, water quality and changing bathymetry (morphology). Delft3D can also be used operationally e.g. storm, surge and algal bloom forecasting. 
 
On this discussion page you can post questions, research discussions or just share your experience about modelling coastal and/or estuarine systems with Delft3D FM. 
 

** PLEASE TAG YOUR POST! **

 

 

Sub groups
D-Flow Flexible Mesh
DELWAQ
Cohesive sediments & muddy systems

 


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RE: Standalone wave model/ coupled with FLOW

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Standalone wave model/ coupled with FLOW
3d wave d3d wave coupling wave and flow
Answer (Unmark)
7/21/16 12:19 PM
Hello Delft3D Community! I would like to ask if anybody had tried wave modeling using the recent source code tagged 6118 with Delft3D GUI 4.01.01.rc.03? I'm developing a wave model coupled with flow. However, in the picture shown below, the flow computation does not even progress. I was waiting for more than 30 mins to see some computation, whether it will continue with the wave iteration but it did not.

I tried running the example and it completed its computation, but in my model it does not. I also did what the FAQ suggests, by clearing the working directory leaving the model inputs only.

And I also did a standalone computation, wherein I run first my FLOW with the comm file and use it for my *.mwf file computation. Again, it did not progress.

I hope somebody would give an insight with the wave modeling in standalone or coupled with flow. Many thanks in advance!

Warm Regards,
Jonathan
Attachment

Attachments: flowcomputation.JPG (74.4k)
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
7/25/16 10:25 AMas a reply to Jonathan Ray Abat.
Hi,
Please have a good look at the tri-diag file or otherwise the output file of SWAN for relevant warnings or errors.

You can also alter the start time of coupling (communication file in FLOW) in order to first let your FLOW simulation run for say 10 min after which WAVE should start. Often this helps in locating the problem...

Ciao, Arjen
RE: Standalone wave model/ coupled with FLOW
coupled wave-flow model delft 3d
Answer (Unmark)
7/27/16 11:01 AMas a reply to Arjen Luijendijk.
HI Arjen,

Thanks for the reply! Indeed, the flow started to run upon adjusting the COM start time on a later date. There are no SWAN file generated on my computer (I'm using Delft3D 4.01.01.rc.03 on Windows 10, 64 bit). Then I tried using it in my laptop (Winows 7 with older source code tag and GUI) the SWAN file states that

ERROR: SWAN file PRINT contains ERRORS

I also checked on the PRINT file, and it has a message saying a lot about the following:

** Error : Grid angle <0 or >180 degrees
** Error : 3 comp. grid points on one line
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
7/28/16 6:58 AMas a reply to Arjen Luijendijk.
Hello, Arjen.

I think I saw my problem. I saw that the grid from the visualization area from flow and wave are not the same. I just loaded the grid file of FLOW to the WAVE module. Would you know what could be causing this?
Attachment

Attachment

Attachments: FlowGrid.PNG (39.1k), WaveGrid.PNG (21.5k)
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
7/28/16 3:03 PMas a reply to Jonathan Ray Abat.
Hi,
Could you upload the grids as well so i can have a look in RGFGRID. It seems that SWAN does not accept your wave grid as some grid cells are either too small or not sufficiently orthogonal.
Arjen
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
7/29/16 3:46 AMas a reply to Arjen Luijendijk.
Hi, Arjen.

Here's the grid file I'm using. I find it a bit odd when I import the grid in WAVE module. If the raw grids from spline are imported to the WAVE GUI, they are ok, but if I try to delete the excess grids, it becomes like the one I showed you earlier.


Best,

Jonathan
Attachments: CCBP_waves.enc (1.7k), CCBP_waves.grd (188.8k)
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
11/16/16 8:58 AMas a reply to Jonathan Ray Abat.
Hi, Jonathan,

I have the same situation with you but I don't know how to fix the error. Have you solved it now?

Best,

Bing
RE: Standalone wave model/ coupled with FLOW
Answer (Unmark)
3/17/17 7:50 AMas a reply to Bing Zhao.
Hi Bing Zhao,

There's a thread I saw relating to our problem. Qinghua was able to solve it. Here's the link to his answer: https://oss.deltares.nl/web/delft3d/coast-/-estuary/-/message_boards/view_message/1069296/maximized#_19_message_1077039

You have to check the grid file. If the missing value is 999.00 or similar, just replace it with Missing Value = 0.00000000000000000E+02. The same with the rest of the grid file.

Best,

Jonathan