Tutorial Module02 Archive: Difference between revisions
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<ol>
=Introduction=
A purely 2D model was developed during the Module 1. You may have noticed, when reviewing the results, that some road embankments were causing a damming effect across the main channel. In reality there are culverts beneath these embankments. We will add 1D culverts to the 2D model created in [[Tutorial
The main steps in the process are outlined in the Table of Contents at the top of the page.<br>
The only new file type that is introduced in this module is the 1d_nwk GIS layer. This layer defines the 1D or quasi-2D (branched 1D) domain network of flowpaths (channels) and storage areas (nodes).<br>
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=Define 1D Structures=
There are three culverts that will be modelled in this module. The locations of these structures has been provided in the '''Module_Date\Module_02\GIS\''' folder. To define the 1D network for TUFLOW input, please select your GIS package from the list below:
*[[
*[[
*[[
*[[
=Define 1D/2D Linkages=
We now need to specify how the 1D culverts is linked to the 2D domain. For this tutorial we will use two different methods to highlight the two main approaches to creating the linkage.<br>
The setup of the link is done in your GIS package, please select your chosen GIS package from the list below:<br>
*[[
*[[
*[[
*[[
=Simulation Control Files Updates=
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For <u>SMS</u> users, you do not need to modify these files manually, it is automatically done when you export TUFLOW files from SMS. Follow the instructions on page "[[
<br>
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<br>
'''<u>SMS Users</u>''', you do not need to modify these files manually, it is automatically done when you export TUFLOW files from SMS. Follow the instructions on page "[[
=Run the Simulation=
Using your preferred method for starting TUFLOW, run '''M02_5m_001.tcf'''. Please refer to <u>[[
=Error 2050=
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The reason for this is that the "SX" type boundary is a source boundary for the 2D cells (the source comes from the 1D model), the 1D model has a water level boundary applied from the 2D cells. Even when the 2D cells are dry, the level is above the 1D channel invert and mass could be created. TUFLOW does not allow this to happen and Error 2050 is reported.<br>
To locate the area that where this is occurring, we will load the messages layer into our GIS package, please pick from the list below:<br>
* [[
* [[
* [[
* [[
To correct the incorrect downstream invert level for culvert "FC04.1_C" in your GIS package set the "DS_invert" attribute to 42.75 and save the layer. For MapInfo users, don't forget to re-export the layer to .mif format.</li><br>
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This will take a few minutes for the simulation to run. As mentioned in Module 1, now would be a good time to fill in your TUFLOW modelling log ([[TUFLOW_Modelling_Log | TUFLOW Modelling Log]]), have a stretch or get a cup of coffee....<br>
If the model fails to start correctly please refer to the <u>[[
=Check Files=
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* In the 1D block: <font color="blue"><tt>Write Check Files </tt></font> <font color="red"><tt>==</tt></font><tt> ..\check\1d\</tt><br>
For a model such as the tutorial model which runs in a few minutes, the check files are less important as any issues should show in our results. However, larger models may take hours to run and it is good practice to review the check files so time isn't wasted. The check files are output in GIS format, please choose your package from the following list:<br>
* [[
* [[
* [[
* [[
=Review the Results=
==2D Results==
The 2D model results can be viewed using the same methods described in <u>[[
==1D Results==
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===GIS Format===
To view the results in your GIS please select the package from the list below:<br>
* [[
* [[
* [[
* [[
===CSV Format===
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We have added 1D culvert channels to represent the culverts underneath the road embankments. The 1D elements have been dynamically linked to the 2D model using three different methods.<br>
The model was simulated and the 1D results reviewed using a combination of GIS software and Excel.<br>
In the next module of the tutorial we will be modifying the 2D topography to incorporate surveyed breaklines. This can be found on the [[
In Module 4 we will model the creek as 1D channels, linked to the 2D model. This module has not yet been updated to the online wiki format, the previous version (MapInfo only) can be found
=Troubleshooting=
This section contains links to some possible issue that may occur when progressing through the second tutorial module.
If you are unsure of why the model has failed to start, check the TUFLOW Log File (this is in the '''TUFLOW\runs\log\''' folder and has the name '''M02_5m_001.tlf'''. This can be opened in a text editor, the error is generally at the end of the file, however you can search for "Error" if you can not see the error.
*[[
*[[
*[[
*[[
= Advanced - HPC Solver (Optional) =
In this optional section we will run the model using the TUFLOW HPC (Heavily Parallelised Compute) solver.
TUFLOW HPC can run between 10 and 100 times faster than TUFLOW Classic using NVidia Graphics Processing Units (GPU)(depending on the model configuration and hardware performance). We will review relevant log messages and results.
==Model Setup==
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==Results==
Using the methods described in the <u>[[
* Check the simulation logs in the
[[File:Tute M02 HPC 001.png|frame|none]]
* View the results in your preferred package. How do they compare to the TUFLOW Classic results?
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