Meshing M03 Draft

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Tutorial Description

Read the Tutorial Introduction before starting this tutorial. It outlines the required links to download SMS, which we will use for mesh generation.

This tutorial is designed to introduce the skills required for creating a mesh and generating a Digital Elevation Model (DEM) from multiple datasets, and builds on the skills introduced in Meshing Module 1 and Meshing Module 2. Specifically, this tutorial includes:

  • Definition of breaklines for defining channel elevations.
  • Use of multiple elevation data types to create a model bathymetry.
  • Creation and modification of a complex mesh, including the use of the topographic pre-processor TOPAZ.
  • Meshing techniques required for different areas of a model domain.

The workflow uses SMS Community Edition to develop a model mesh and bathymetry.

Model Domain

The tutorial focuses on Cudgen Creek, a small coastal estuary on the eastern Australian coastline. The mesh extends approximately 20 km north-south and 12km east-west to a depth of 50m.

M03 CC ModelDomain ahd 002.png

Requirements And Downloads

Requirement Brief Description
Meshing Data Download the Meshing Module 3 Data Package MADDY TODO link data.
Assumed Knowledge It is recommended to complete the Meshing Module 1 and Meshing Module 2 prior to completing this tutorial. If you run into any problems or need help, please contact support@tuflow.com

Prepare The Working Environment

Unzip the required Model Data to your preferred working location, for example E:\TUFLOWFV\Meshing_M03.

  • The Complete_Mesh folder has the files for the completed tutorial.
  • The Working folder is where we will save our files and build our mesh.
M03 Mesh folder structure.png

Note: All file paths referred to will be relative to this base directory. For example, Complete_Mesh\Cudgen_Creek_001.2dm refers to E:\TUFLOWFV\Meshing_M03\Complete_Mesh\Cudgen_Creek_001.2dm .

Provided Project files

To save time and allow focus on meshing techniques multiple files have been provided. Copy the following files from the Model_Data folder into the specified folders:

MADDY: Make sure the nomenclature in the table re: zones is absolutely spot on and consistent please. It seems a bit inconsistent and confusing

Model Data\Elevation\ Copy to Description
Bathy_DEM_30m_AHD_MGA56.tif Working\DEM Combined offshore bathymetry and intertidal DEM at a grid size of 30m.The data is represented in Australian Height datum AHD and UTM Zone 56 of the Geocentric Datum of Australia (GDA94) within Map Grid of Australia (MGA).
DEM_Catchment_5m_AHD_MGA56.tif Working\DEM Digital elevation model of the Cudgen Creek catchment at 5m grid size. The data is represented in Australian Height datum AHD and UTM Zone 56 of the Geocentric Datum of Australia (GDA94) within Map Grid of Australia (MGA).
Lake_Coast_survey_AHD_MGA56.csv Working\DEM Point survey data of the upstream lake and coastal zone. The data is represented in Australian Height datum AHD and UTM Zone 56 of the Geocentric Datum of Australia (GDA94) within Map Grid of Australia (MGA).
Sample_creek_survey_AHD_MGA56.TXT Working\DEM A sample of point survey data. The data is represented in Australian Height datum AHD and UTM Zone 56 of the Geocentric Datum of Australia (GDA94) within Map Grid of Australia (MGA).
Model Data\SMS Copy to Description
Base_Data.map Working\Map SMS map data file that will assist in the generation of mesh and DEM. The data is represented in UTM Zone 56 of the Geocentric Datum of Australia (GDA94) within Map Grid of Australia (MGA).

Setup The SMS Project

Save The Workspace

Before we start meshing we'll set up our working projection and save a new SMS project.

Launch SMS and use the below steps and video to save the workspace in the Working folder:

1. From the menu bar select File > Save As.
2. Navigate to Working folder.
3. Save the workspace as Cudgen_Creek_001.sms

Set The Workspace Projection

Set the projection GDA 1994 MGA Zone 56 from the menu bar Display > Display Projection....

Use the below steps and video to set the workspace projection:

  1. Go to Display > Display Projection....
  2. Select Global projection.
  3. The Horizontal Projection dialog will appear. In the Filter strings: type GDA 1994 MGA Zone 56. Select the projection and OK > OK.

Load And Display The Data

Use the below steps and video to open and set the display options for map files and aerial imagery:

1. Select File > Open.... Navigate to Working\Map\Base_Data.map and Open. Specify the display as below:
  • Within the Map Data panel turn on Breaklines to view the current display.
  • Select Display Options DisplayOptionToolSMS.png.
  • In the Display Options select the point/Node dropdown and set the the colour to red.
  • Check the Vertex attributes are on and update symbol attributes to a crosshair symbol +.
  • Select OK > OK.
2. Select File > Add Online Maps.... From the Get Online Maps dialog select World Imagery > OK. Specify the display as below:
  • From the project panel right click on World Imagery and select Transparency....
  • Update the transparency to 30%. Select OK.

Constructing The Bathymetry

Setting bathymetry requires very careful and judicious use of data by the modeller – be careful and clean. This section outlines the process of constructing the bathymetry of the model domain using a variety of data types. The goal of this exercise is to create a bathymetric surface that seamlessly integrates both high and low resolution data, tailored to the specific spatial needs of the model domain. Outcomes of this section include:

  • Creating breaklines.
  • Converting multiple elevation data types into scatter data.
  • Merging scatter sets.
  • Creating a raster.

Creating Breaklines

The examples provided in this section demonstrate techniques to build breaklines. Doing so is a core skill required to build bathymetric data sets for TUFLOW FV models, so investing time in learning this skill is worthwhile. In general, the goal is to digitise/construct breaklines as feature arcs in a map coverage that can then be both exported as a scatter set for geotiff creation and used directly within TUFLOW FV as 2d_zln breaklines at run time. One reason to initially build these breaklines as feature arcs is to draw on the extensive suite of geometry and interpolation functions offered in map coverages compared to scatter sets. Although some will be built via the steps below, the final breaklines for this model extent have been provided in the Map_Data and will be later used to build the model bathymetry.

MEB: Why are we opening the same data twice, once as a scatter and once as a map? Can we just go to map directly?

Use the below steps and video to import the survey data as a scatter set:

  1. Select File > Open.... Navigate to Working\DEM\Sample_creek_survey_AHD_MGA56.TXT and Open.
  2. The File Import Wizard dialog will appear. Specify the following:
    • Check that the File import option is set to Delimited.
    • The Column delimiter Tab should be checked. Select Next >.
    • Select Finish.
    • Select OK for the warning: Specify the projection for imported data.
    • The data is in the same projection as the project window. Select OK.
  3. Within the Project panel right click on Sample_creek_survey_AHD_MGA56 > Zoom to Scatter.
  4. Select Display Options DisplayOptionToolSMS.png and specify the following Scatter options:
    • Under the Points check Use contour color scheme.
    • Check Scalar values.
    • Select the Scalar values font options and update to font size to 11.
  5. Use the Select Scatter Point tool to view the elevations at each point.


Use the below steps to open the survey data as Feature type data that we can use to construct the break lines.

  1. In the project panel right click on Map Data > New Folder. Rename it Breaklines
  2. Again select File > Open.... Navigate to Working\DEM\Sample_creek_survey_AHD_MGA56.TXT and Open.
  3. The File Import Wizard dialog will appear. Specify the following:
    • Check that the File import option are set to Delimited.
    • The Column delimiter Tab should be checked. Select Next >.
    • From the SMS data type dropdown select Feature Data
    • Select Create... and from the New Coverage dialog rename Area Property coverage Breaklines_gen.
    • Select OK > OK.
    • Select No when the the warning Arcs have not been mapped. Would you like to connect the points as one continuous arc? appears.
    • The data is in the same projection as the project window. Select OK.
    • Select OK for the warning: Specify the projection for imported data. As the data is in the same projection as the project window. Select OK.
  4. Using the Select Objects tool select the point within Breakline_gen and review the assigned elevations within the Z field. This data matches the scatter data set and will be used to interpolate elevations along breaklines.


The first breakline example involves interpolating the elevations along a feature arc between two survey points. Use the below steps and video as a guide:

  1. Zoom into the data (refer to video)
  2. Using the Create Feature Arc tool digitise an arc from elevation -2.30 to -2.32. Note snap the arc to each point (refer to the video).
  3. Using the Select Feature Arc tool select the new arc. Right click and select Redistribute Vertices.... Set the following attributes in the Redistribute Vertices:
    • From the drop down select Specified spacing.
    • Set an average spacing of 5. Select OK.
  4. Whilst the arc is still selected right click and select Smooth Arc(s).... Set the following attribute in the Smooth Arcs Tool dialog:
    • Set the Number of neighbors to 7.
    • Select OK.
  5. Again right click on the arc and select Interpolate Vertex Elevations.
  6. Using the Select Feature Vertex tool review how the elevation at each vertex (refer to the video).


In this example survey data points and user defined points are uitlised to create breaklines that represent a deep pond in the channel bathymetry. Use the below steps and videos as a guide:

  1. Using the Create Feature Arc tool digitise an arc around the pond. Note snap the arc ends to lowest elevation points (-2.30) at the sides of the pond (refer to the video).
  2. Repeat step 1 for the other side of the pond (refer to video).
  3. Using the Select Feature Arc tool hold shift and select the both arcs. Right click and select Redistribute Vertices.... Set the following attributes in the Redistribute Vertices:
    • From the drop down select Specified spacing.
    • Set an average spacing of 5. Select OK.
  4. Whilst the arc is still selected right click and select Smooth Arc(s).... Set the following attribute in the Smooth Arcs Tool dialog:
    • Set the Number of neighbors to 7.
    • Select OK.
  5. Again right click on the arc and select Interpolate Vertex Elevations.
  6. Using the Select Feature Vertex tool review how the elevation at each vertex (refer to the video).


  1. Using the Create Feature Point tool digitise a point within the feature arcs that were created in the previous steps (refer to the video).
  2. Update the elevation value of point in the Z field to -3.0.
  3. Using the Create Feature Arc tool digitise an arc as circle that starts and ends at the new feature point (refer to the video).
  4. Using the Select Feature Arc tool hold shift and select the both arcs. Right click and select Redistribute Vertices.... Set the following attributes in the Redistribute Vertices:
    • From the drop down select Specified spacing.
    • Set an average spacing of 5. Select OK.
  5. Whilst the arc is still selected right click and select Smooth Arc(s).... Set the following attribute in the Smooth Arcs Tool dialog:
    • Set the Number of neighbors to 7.
    • Select OK.
  6. Again right click on the arc and select Interpolate Vertex Elevations.
  7. Using the Select Feature Vertex tool review how the elevation at each vertex (refer to the video).


MITCH/MICHAEL is the below example a bit weird? Should I demo it on the bank instead? MEB LIKES IT

In the third example the breakline elevation is assigned via the feature arc. Use the below steps and video as a guide:

  1. Using the Create Feature Arc tool digitise an arc from the pond to the bridge. Note do not snap the arc to any point data in the coverage (refer to the video).
  2. Use the Select Feature Arc tool to select and update the elevation value to -2.5.
  3. Right click on the arc and select Redistribute Vertices.... Set the following attributes in the Redistribute Vertices:
    • From the drop down select Specified spacing.
    • Set an average spacing of 5. Select OK.
  4. Whilst the arc is still selected right click and select Smooth Arc(s).... Set the following attribute in the Smooth Arcs Tool dialog:
    • Set the Number of neighbors to 7.
    • Select OK
  5. Again right click on the arc and select Interpolate Vertex Elevations.
  6. Using the Select Feature Vertex tool review how the elevation at each vertex (refer to the video).


Once the map coverage has been utilised to create and assign elevations to the breaklines and associated vertices, it is then transformed into a scatter dataset. Use the below steps and video as a guide:

  1. Uncheck Sample_creek_survey_AHD_MGA56 in the Scatter Data coverage.
  2. Right click on Breaklines_gen in the Map Data coverage.
  3. Select Convert > Map -> 2D Scatter.
  4. In the Map -> Scatter dialog set the Scatter Point Z-Value Source to Arc end points and vertex elevations. Leave the rets as default and select OK.
  5. Uncheck Breaklines_gen map data and review the new Breaklines_gen Scatter Data.
  6. Right click on each scatter set and remove.

MADDYTODO redo video to show final breaklines -the concept/steps is the same though.


The above demonstrated multiple techniques to build model breaklines. Review the breaklines included in the Base_Data and explore how the techniques discussed above can be applied to construct breaklines for the entire model domain. Use the below steps and videos as a guide:

  1. From the the Base_data folder check and select the map coverage Breaklines.
  2. Use the select tools to review how the channel thalweg elevations are interpolated via breaklines throughout the model area.

MADDYTODO redo video-the concept/steps is the same though.


Using Multiple Data Types To Create Bathymetry

MADDY TODO add description in this section. Highlight how important is that tall the data is in the same projections.


Converting Breaklines. State what the data is and where it is from.

  1. Open All breaklines coverage
  2. Convert to 2D scatter – select source as arc end points and vertices, and same for z-value source (second radio button)
  3. Review scatter breaklines
  4. lines and points have values directly from arcs – see interpolated values along a breakline
  5. Note that these can exported as shapefiles

MADDYTODO VIDEO Survey Data Ocean, lake and canal data. State what the data is and where it is from.

Survey Data Ocean, lake and canal data. State what the data is and where it is from.

Use the below steps and video to import the survey data:

  1. Select File > Open.... Navigate to Working\DEM\Lake_Coast_survey_AHD_MGA56.TXT and Open.
  2. The File Import Wizard dialog will appear. Specify the following:
    • Check that the File import option are set to Delimited.
    • The Column delimiter Tab should be checked. Select Next >.
    • Select Finish.
    • Select OK on the warning Specify the projection for imported data.
    • The data is in the same projection as the project window. Select OK.
  3. Within the Project panel right click on Lake_Coast_survey_AHD_MGA56 > Zoom to Scatter and review data.

MADDYTODO VIDEO

Converting Grid Data To Scatter. State what the data is and where it is from.

  1. open Bathy_DEM_30m_AHD_MGA56 combined bathy and catchment data form GA
  2. Right click convert to Scatter. May take a while to process

MADDYTODO VIDEO


Merge Scatter And Create Raster

  1. Scatter -> Merge Sets
  2. Set name as Mesh
  3. Do not tick Delete original scatter sets checkbox
  4. OK
  5. Ignore numerical limitation error if it arises
  6. Save SMS project

MADDYTODO VIDEO

M03 merge scatter del.png

convert into asci

  1. Select scatter set
  2. Convert to ascii grid
  3. Right click on Mesh scatter set
  4. Convert, Scatter -> Raster
  5. Accept defaults but set cell size to 5m
  6. In Save As dialogue, set name to C:\TPT211\Modelling\TUFLOWFV\model\geo\Cudgen_Creek_bathy_001 and select Save as Type Arc info ascii grid file (asc)
  7. OK. May take a while to process

MADDYTODO VIDEO

M03 convert scatter raster del.png

Trim raster using the Base_Data provided.

  1. right click
  2. Select convert > trim raster
  3. Use trim_bathy

MADDYTODO VIDEO

Constructing The Mesh

In this section we will complete key steps required to build a mesh including:

  • Construct the in channel mesh.
  • Construct the mangrove areas
  • Construct the ocean mesh

Building The Channel Mesh

The mesh in this example uses high resolution quadrilaterals to capture the in-channel hydrodynamics. For demonstration purposes we will mesh downstream of the bridge to the estuary entrance only. The same techniques can be applied to mesh in other channelised areas of the model domain.

Specially we will: MADDY: USE CONSUSTENT YOU/WE please. I PREFER WE

  • Run TOPAZ
  • Create bank lines
  • Edit bank lines
  • Define the downstream bridge opening
  • Use blended arcs to define smooth bank lines
  • Generate a mesh


The SMS topographic preprocessor TOPAZ helps to guide our mesh development. TOPAZ allows the extraction of topographic features from the DEM such as the channel center line and banks.

Use the following steps and video to open the data and run Topaz:

  1. Right click on DEM_Catchment_5m_AHD_MGA56.tif and select Run TOPAZ. Note that the TOPAZ processing may take some time.
  2. Once complete select OK.
  3. Navigate to Working\DEM and two new files (.Tz and .TZlnv) will have been created.

Uncheck DEM_Catchment_5m_AHD_MGA56 in the project panel.


To create the Bank Lines we have provided the Stream and Guidance map data. SMS requires these to generate bank lines. MADDY TODO explain these further. Use the following steps and video to create the channel bank lines:

  1. In the project panel right click on Map Data > New Folder. Rename it Channel mesh.
  2. Under the Base data folder select Stream coverage. Right click and select duplicate.
  3. Move Streams (2) into the Channel mesh folder and rename it CL.
  4. Select the guidance coverage and use the following steps to copy the guidance Feature Point.
    • Zoom into the Estuary entrance.
    • Using the Select Feature Select Point select the point. Right click and select Copy to Coverage....
    • From the dialog select CL coverage and OK.
  5. Select the CL from the Map Data. The copied feature should now appear in the CL coverage.


Now that the stream line and guidance point are within the same coverage we can create the bank lines using the following steps and video:

  1. Select the coverage CL.
  2. Use the Select Objects tool and hold Ctrl > drag the curser over the line.
  3. Now holding Shift select the guidance point that was copied into this coverage. Right click and select Extract Banks....
  4. From the Extract Features dialog update the following:
    • From the Use the depth drop down select Closest to centerline.
    • Set the Distance from Centerline maximum to 125.
    • Update the Output Coverage name to Mesh.
  5. Select the new Mesh coverage and right click and select Type > Generic > Mesh Generator. MADDY TODO change the Mesh name to Channel_Mesh. you will need to update videos to reflect this


The Break walls coverage has been provided so that we can focus on building the in channel mesh. Use the following steps and video to copy the break walls into the Mesh coverage:

  1. Under the Base data folder select the Breakwalls coverage and right click > Zoom to Coverage.
  2. Using the Select Objects tool click and drag the cursor across the nodes, vertices, arcs and polygons within the Breakwalls coverage (refer to video).
  3. Right click and select Copy to Coverage....
  4. From the dialog select Mesh and OK. The breakwalls are now represented in the Mesh coverage.
  5. Use the Select Feature Point tool to snap the bankline feature arcs to the breakwall arcs (refer to video).

The below VIDEOS ARE MOCK UPs needing review -this section header will be removed

In this tutorial we will modify and review the lower estuary channel only. However in a real world example the modeler would review and refine the entire mesh.

To accurately represent the estuary channel we need modify the bank lines using the DEM and aerial imagery as a guides. In the Project panel make sure DEM and aerial is turned on. It is recommended to minimise manual redistribution of vertices. In this section we will delete unnecessary vertices and use the SMS tools redistribute vertices and to create a smooth arcs that are later used to generate the mesh.

Use the following steps and videos to as a guide to edit the banks:

1. Zoom into the lower estuary.
2. Starting on the left bank use the Select Feature Vertex to delete unnecessary vertices so that the channel is adequately represented. You may need to move some vertices into place (use the below video as a guide).
3. Remember to use on the DEM and aerial to determine where the channel banks should be.

4. Repeat steps 1-3 for the right bank (use the below video as a guide).
5. Using the Select Feature Arc tool hold shift and select both arcs.
6. Right click and select Redistribute Vertices....
7. Set the following attribute in the Redistribute Vertices:
  • From the Specify drop down select Specified spacing
  • Set an average spacing of 5.
  • Check Use cubic spline and select OK.
8. Whilst both arcs are still select right click and select Smooth Arc(s).... In the Smooth Arcs Tool dialog set the Number of neighbors to 7. Leave the rest as the default and select OK.


Some sections of the channel may not be well defined. Repeat steps 1-7 until the channel is well defined. Use the below video as a guide:


Define the Downstream Bridge Opening

The below steps and videos demonstrate how to resolve the downstream bridge opening in the Mesh. Use the aerial image as a guide and follow the below steps and videos:

1. Select Create Feature Arc and digitise a new arc using the footpath on the bridge as a guide (refer to the video).

Now add two new internal arcs to resolve the bridge opening.

2. Using the Create Feature Arc tool digitiise an internal arc on the left bank. Start from the bridge arc and digitise towards the left bank (Refer to video).
3. Repeat the same for the right bank (Refer to video).
4. Using the Select Feature Arc select and right click on the arc along the bridge and select Redistribute Vertices.... Set the following attributes:
  • From the Specify drop down select Number of Segments.
  • Set the number of segments to 4.
  • select OK.

We will now redefine the bank lines use the below steps and videos:

  1. Select and delete both outer arcs.
  2. Convert the nodes to vertices
  3. Set the following attribute in the Redistribute Vertices:
    • From the Specify drop down select Specified spacing
    • Set an average spacing of 5.
    • Check Use cubic spline and select OK.
  4. Whilst both arc are still select right click and select Smooth Arc(s)....
  5. In the Smooth Arcs Tool dialog set the Number of neighbors to 7. Leave the rest as the default and select OK.


Defining and Generating a Smooth Mesh

  1. Choose Select feature arc tool
  2. Select newly merged bank arcs, right click and select blend arcs
  3. Set blended arc (noting its ID in the bottom commentary of the SMS window) to have 20m spacing vertices, with cubic spline and smooth with 1 neighbour
  4. Select blended arc and eastern bank arc, right click, Redistribute vertices, Specify: Source arc and select the blended arc as the source, check cubic spline, click OK
  5. Select blended arc and western bank arc, right click, Redistribute vertices, Specify: Source arc and select the blended arc as the source, check cubic spline, click OK
  6. Clean all nodes and all arcs. The build polygons
  7. Make everything patch (channel and break wall ploygons) Generate Mesh
  8. Review the mesh and then remove it from the project panel.


Building The Mangrove Mesh

This example uses triangles to mesh and capture intertidal hydrodynamics. For demonstration purposes we will mesh the mangrove areas upstream of the bridge. The same techniques can be applied to the mesh in other intertidal areas of the model domain.

Specially we will:

  • Use the DEM and aerial imagery to identify and digitize intertidal areas.
  • Digitize intertidal areas
  • Edit paving polygons and merge triangles
  • Generate a mesh

To mesh the mangrove areas we have provided a template mesh. Note in the template the bank areas downstream of the bridge have already been included. Use the following steps and videos to mesh the mangrove areas upstream of the bridge:

  1. In the project panel right click on Map Data > New Folder. Rename it Mangrove mesh.
  2. Under the Base data folder select Mangrove_mesh_template coverage. Right click and select duplicate.
  3. Move Mangrove_mesh_template (2) into the Mangrove mesh folder and rename it Mangrove_mesh.
  4. Zoom into the bridge at the lower estuary.
  5. Turn on the DEM.


Here we will create of the mangrove area on northern bank. Use the following steps and video as a guide:

  1. Use feature arc to digitise the mangrove area. Remember to use the aerial and DEM as a guide.
  2. Set the following attribute in the Redistribute Vertices:
    • From the Specify drop down select Specified spacing
    • Set an average spacing of 5.
    • Check Use cubic spline and select OK.
  3. Whilst both arc are still select right click and select Smooth Arc(s)....
  4. In the Smooth Arcs Tool dialog set the Number of neighbors to 7. Leave the rest as the default and select OK.
  5. Again Redistribute the vertices with the following attributes:
    • From the Specify drop down select Number of Segments.
    • Set the number of segments to 10.
    • select OK.
  6. Clean all nodes and all arcs. The build polygons.
  7. Use Select Polygons tool and double click on the new polygon. The 2D Mesh Polygon Properties will appear, select Preview Mesh to view the new area mesh.
  8. Select OK

Here we will create of the mangrove area on southern bank. Use the following steps and video as a guide:

  1. Use feature arc to digitise the mangrove area. Remember to use the aerial and DEM as a guide.
  2. Set the following attribute in the Redistribute Vertices:
    • From the Specify drop down select Specified spacing
    • Set an average spacing of 5.
    • Check Use cubic spline and select OK.
  3. Whilst both arc are still select right click and select Smooth Arc(s)....
  4. In the Smooth Arcs Tool dialog set the Number of neighbors to 7. Leave the rest as the default and select OK.
  5. Again Redistribute the vertices with the following attributes:
    • From the Specify drop down select Number of Segments.
    • Set the number of segments to 8.
    • select OK.
  6. Clean all nodes and all arcs. The build polygons.
  7. Use Select Polygons tool and double click on the new polygon. The 2D Mesh Polygon Properties will appear, select Preview Mesh to view the new area mesh.
  8. Select OK

M03 Mangrove mesh option.png

  1. Generate Mesh
  2. Merge triangles
  3. Review the mesh and then remove it from the project panel

Build Ocean Mesh

(Use secondary basis instead of calculator and try as one way for north and south). Say to them if they have a paid version use the calculator and link them to the SMS webpage on the tool

Digitising the coastline (MADDYTODO- I think we shoudl provide the coastline- the scatter data is pretty messy and I dont think they get a huge amount from this)

Set coastline arc vertex spacing

  1. Copy coastline coverage to mesh
  2. Choose Select feature arc tool
  3. Select northern arc and right click -> Redistribute vertices
  4. Specified spacing of 100m, bias of 10.0, cubic spline
  5. Select southern arc and right click -> Redistribute vertices
  6. Specified spacing of 100m, bias of 10, cubic spline

M03 Redist Coastline del.png

Defining the open ocean boundary

  1. Copy coastline coverage to mesh
  2. Choose Select feature point tool
  3. Select nodes at far southern and northern ends of coastline arcs
  4. Right click -> Define domain
  5. Select semi-circular
  6. OK (if the semicircular arc is oriented inland, then select and delete it, repeat this series of steps, but check the Switch side checkbox in the Define domain dialogue)
  7. Clean and build polygons
  8. Save SMS project

M03 Create ocean Boundary Del.png

Set Ocean arc vertex spacing

  2. Select arc and right click -> Redistribute vertices
    Ocean arc del.png

M03 Define Ocean boundary del.png

Keep for later

3. Select File > Open.... Navigate to Working\DEM\DEM_Catchment_5m_AHD_MGA56.tif and Open. Specify the display as below:
  • Right click on DEM_Catchment_5m_AHD_MGA56.tif and select Transparency....Update the transparency to 40%.
  • Right click on DEM_Catchment_5m_AHD_MGA56.tif and select Display Options....
  • Select Contour Options... from the Raster Display Options Dialog.
  • Check Specify a range.
  • Update the Max field to 10.0 and uncheck Fill above.
  • Leave the Min field as default. Select OK > OK.

Feedback

If you have any queries, feedback or requests for new functionality you would like added to the tutorial modules, please feel free to get in contact with support@tuflow.com.

If you wish to keep up-to-date with all things TUFLOW and TUFLOW FV, then please join our LinkedIn group.

Conclusion And Next Steps

Well done on completing Meshing Module 3. You have now learnt the skills to build a real-world coastal model mesh and generate bathymetry from multiple datasets.

Return to the Tutorial Introduction Page to complete further meshing and model build tutorials.

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