Links
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Description
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New Features and Changes
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Section 4.2
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TUFLOW.exe split into two files: TUFLOW.exe and TUFLOW_LINK.dll. These files must remain together within the same folder at all times. When archiving, place in a folder named using the Build ID, eg. 2005-05-AN.
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Section 3.12.1
Section 3.12.2
Table 4 .10
Pit Channel Offset
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Pit objects in the 1d_nwk layer and automatic creation of pit channels.
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Section 3.12.1
Table 4 .10
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Use of node attributes to set channel upstream and downstream inverts.
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Section 3.12.1
Table 4 .10
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Use of 1d_nwk Length attribute to add additional storage to a node or to automatically generate a NA (node storage) table. Length attribute on any node must be zero for backward compatibility.
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Apply All Inverts
Table 4 .10
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New command Apply All Inverts to use the upstream and downstream invert attributes to all channels (previously only applied to C, G, S, R and rectangular W channels).
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Conveyance Calculation
Section 3.13.6
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New command Conveyance Calculation offers an alternative approach to calculating channel conveyance without the risk of conveyance reducing with height.
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Section 3.13.4
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Cross-sections specified using a 1d_ta (often named 1d_xs) layer can now be specified at the channel ends for G and S channels. The upstream and downstream inverts for these channels can optionally be based on the beds of the cross-sections.
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Storage Above Structure Obvert
Section 3.13.2.3
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Storage contributions from B, C and R channels above their obvert can now be more accurately calculated using Storage Above Structure Obvert.
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Bridge Flow
Section 3.14.4.2
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Improved stability for bridges when they wet and dry and changes to interpretation of the BG loss coefficients table available using Bridge Flow == Method B. The Method A option uses the original bridge routines and remains the default.
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Table 4 .9
Table 4 .11
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Automatic generation of weir channels to represent the overtopping of B, C and R channels. Also includes allowances for representing rails and blockage.
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Table 4 .10
Section 3.14.4.1
Structure Losses
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1d_nwk Form_or_Bend_Loss attribute now used to model additional dynamic head losses in culverts (previously not used).
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Table 4 .10
Section 3.14.4.2
Section 3.14.4.1
Structure Losses
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1d_nwk Form_or_Bend_Loss attribute for B channels can be used to automatically create a BG loss coefficient table or specify an additional loss to a user-defined BG table.
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Structure Losses
Section 3.14.4.1
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New .ecf command Structure Losses to either fix structure entrance and exit losses or to adjust them according to the approach and departure velocities in the upstream and downstream channels.
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Read MI Z Line
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HX option in Read MI Z Line that uses the same approach for selecting cells along a HX line.
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Snap Tolerance
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New Snap Tolerance command for the .tcf and .ecf files that allows changing the search radius used to determine whether two objects are snapped.
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Check Inside Grid
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New .tcf Check Inside Grid command to allow objects in 2d_po, 2d_fc and some other layers to extend outside the 2D domain.
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“none” objects now recognised in .mif layers. “none” objects occur when attribute data has been entered but no object has been digitised. TUFLOW does not use “none” objects, but would previously cause problems reading a .mif file if “none” objects existed.
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Table 4 .21
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New Group option for specifying inflow hydrographs. Can drastically reduce the size of the BC_database.csv file.
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Section 3.17.6
Table 4 .22
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Regions now recognised for 1D QT boundaries in 1d_bc layers. The flow hydrograph is distributed equally to all nodes that fall within the region (except H boundary nodes).
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Table 4 .24
Read MI SA
Read Materials File
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New Rainfall option in the Read MI SA command that allows the application of rainfall depths to all active cells, whether wet or dry, within each SA region. Initial and continuing loss rates can be applied on a material-by-material basis. Note, this feature is undergoing testing and maybe subject to change. In particular, initially high mass errors can occur at the start when the whole model suddenly becomes wet (these are normally small in the overall simulation, but need to be monitored). Very small Cell Wet/Dry Depth and Cell Side Wet/Dry Depth depths have been found to assist, as well as using a smaller timestep.
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The startup time for reading and processing 1D domain data has been markedly reduced by up to a factor of five.
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Head Rate Limit
Section 6.4.4
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The Head Rate Limit command is now available for stabilising problematic 1D nodes. Use with caution as inappropriate use may cause unacceptable mass errors.
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Section 3.6
Timestep (.tcf)
Timestep (.ecf)
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A different timestep can now be specified for the 1D domain and for different 2D domains.
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Section 6.3.3 (2D)
Section 6.4.4 (1D)
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Mass balance output is available for 2D domains (see Mass Balance Output) and automatically output for 1D domains. Note, this feature is not yet complete and maybe subject to change.
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Map Output Data Types
Table 7 .31
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Two new flood hazard categories (Z2 and Z3) have been added to the Map Output Data Types options.
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Table 7 .29
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Further enhancements to the symbology of the 1d_nwk_check.mif file to show whether nodes are connected to two or more, one or no channels – useful for detecting unsnapped nodes and channels.
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Table 7 .29
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Upstream and downstream nodes of a channel are now included as attributes to the 1d_hydprop_check.mif file.
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Table 7 .29
Write MI Domain
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New 2d_dom_check file that contains a rectangle showing the extent of each 2D domain. Can also generate individual domains using Write MI Domain in the tgc file.
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Section 6.2.2
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Further changes to the _messages.mif file to de-clutter it! More changes are also planned in this regard.
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