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. 




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


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RE: 3 dimensional model with 3 layers

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3 dimensional model with 3 layers
Answer (Unmark)
8/5/17 10:15 AM
Hello everyone !! I am Binata Roy, currently working on setting up a 3-dimensional sediment model for Jamuna River. But I am facing several problems.

1. When I am trying to set up a 3-dimensional hydrodynamic model then the following errors are showing :

Part I - Initialisation Time Dep. Data module...
runid : three
Part II - Creating intermediate files...
Part III - Initialisation of the Execution module...
*** WARNING Double precision computation using reals of kind 8
Part IV - Reading complete MD-file...
error occured during reading phase, see tri-diag file for details.

Can anyone help me with this problem?

RE: 3 dimensional model with 3 layers
Answer (Unmark)
8/7/17 1:41 AMas a reply to Binata Roy.
Hi Binata,

You need to check the 'tri-diag' file in your modelling directory. This is a diagnostics file that often (but not always) gives you useful information on the error that is preventing your model from initialising.

As the error is during the initialisation of your model, rather than during the simulation itself, the error is due to the way you have set up the model rather than anything numerical (such as timestep etc). Common things that can result in an error, and are typically mentioned in your tri-diag file:

* An error in one of your boundary files
* The model starts at a time incompatible with the time stated in one of your input files
* A file is missing (grid, depth, etc)
* The simulation period is less than your specified smoothing time
* You have a problem with your Domain Decomposition (if using DD)