intro story Coast / Estuary

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

 

 

Message Boards

Warnings and errors using roller model

JG
João Gil, modified 7 Years ago.

Warnings and errors using roller model

Padawan Posts: 29 Join Date: 10/24/12 Recent Posts
Dear all,

I'm running a coupled simulation between WAVE and FLOW modules, which used to be finished without any warnings or errors when using FLOW 5.00.05.
However, after installed FLOW 6.01.01 I've started to have some problems as soon as I turn on the roller model.
Firstly, all grid points verify the condition Cr<1 and this is a stationary computation. As for the boundaries, I'm using water level offshore and Neuman type in the lateral boundaries, as suggest in the manual.
I've attached tri-diag.flow.

Thanks in advance,
João Gil
JG
João Gil, modified 7 Years ago.

RE: Warnings and errors using roller model

Padawan Posts: 29 Join Date: 10/24/12 Recent Posts
I'd really appreciate if someone could explain me what does the error "*** ERROR Deltas > water depth in TRATUR " mean.

Regards,
João Gil
Qinghua Ye, modified 7 Years ago.

RE: Warnings and errors using roller model

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi João,

Seems like sth wrong with our implemention of the wave dissipation 3d in the beginning of this year. Can you send us your model to better target the problem?

Thanks!

Qinghua
JG
João Gil, modified 7 Years ago.

RE: Warnings and errors using roller model

Padawan Posts: 29 Join Date: 10/24/12 Recent Posts
Hi Qinghua,

I've attached the model as you requested.

Regards,
João Gil

Attachments:

JG
João Gil, modified 7 Years ago.

RE: Warnings and errors using roller model

Padawan Posts: 29 Join Date: 10/24/12 Recent Posts
I've attached another model in which, after changing threshold depth(t.d.) from 0.1m to 0.05m, the same error occurs (*** ERROR Deltas > water depth in TRATUR).
The model is also a 3D coupling between FLOW and WAVE.
I've inspected the results by comparing both t.d.=0.1m and t.d.=0.5m and there are no signs of abnormal computation.
The outputs I've compered were wave height(WAVE), depth averaged velocity(FLOW) and setup(FLOW).
However I'm using FLOW GUI 4.00.02 and tag 5.01.00.2163.
I've questioned myself, how reliable are those results?

Regards,
João Gil
Qinghua Ye, modified 7 Years ago.

RE: Warnings and errors using roller model

Jedi Council Member Posts: 610 Join Date: 3/2/11 Recent Posts
Hi João,

Sorry for late response.

I checked your model with the latest tag version 6.01.02.2869 (Refer to the release note on this website), both your models run well. I didn't reproduce the message you reported.

LSTF model crashed at about 5% and reported the water level gradient is too big. You have to check this by yourself, either the model settings or the boundary conditions. No problem was found with the CORNELIA model so far (5% finished).

Cheers,

Qinghua