TUFLOW July 2007 Release Notes

Brief descriptions of each build for the July 2007 release are provided below. New builds are provided in the event of any bug fixes or minor enhancements, and recognition of new dongles. Different builds are computationally identical except for some bug fixes as described below. It is recommended to always use the latest build. Email notification of new builds are sent out to all registered members of the TUFLOW Forum (to register click here).

Build 2007-07-BF: March 20, 2008 (Multiple automatic 2D HQ boundary bug fix)

Build 2007-07-BE: March 6, 2008 (SA RF bug fix; Recognises Dongles up to U0850)

Build 2007-07-BD: December 5, 2007 (ISIS-TUFLOW bug fixes; New features)

Build 2007-07-BC: November 14, 2007 (Bug fix relating to negative direct rainfall or infiltration)

Build 2007-07-BA: October 4, 2007 (Recognises Dongles up to U0720)

Build 2007-07-AF: September 10, 2007 (Minor bug fix in mass error reporting along 2D H boundaries)

Build 2007-07-AE: September 6, 2007 (Minor bug fix and enhancements)

Build 2007-07-AD: August 31, 2007 (Minor bug fixes and enhancements)

Build 2007-07-AC: August 20, 2007 (Minor bug fixes and enhancements)

Build 2007-07-AB: August 14, 2007 (Minor bug fixes)

Build 2007-07-AA: August 3, 2007 (First release)

New Features in July 2007 Release

Build 2007-07-BF: March 20, 2008 (top)


Build 2007-07-BF contains a bug fix for where more than one automatically generated 2D HQ boundary is specified.

1. If more than one automatically generated 2D HQ boundary exists, the computed stage discharge curve is based on all of the HQ boundaries lumped together as one (as can be evidenced in the 2d_bc_tables_check.csv file). The 2d_bcc_check.mif layer also shows all of the HQ cells being assigned to the same boundary data. This build fixes this bug.

Build 2007-07-BE: March 6, 2008 (top)


Build 2007-07-BE contains a bug fix for SA RF inflows. It also recognises dongles up to U0850.

1. Includes a bug fix relating to using the RF option for SA inflows (ie. Read MI SA RF command). In some instances the latter part of the hydrograph created from the rainfall hyetograph was not divided by the 2D cell area. For more information click here.

Build 2007-07-BD: December 5, 2007 (top)


Build 2007-07-BD contains several enhancements and bug fixes as follows. This is an essential upgrade if linking TUFLOW to ISIS, and has a useful feature for models with 2D-2D linking.

1. Includes two bug fixes relating to ISIS-TUFLOW models crashing during startup. One occurred if Mass Balance == ON was set, and the other occasionally occured if using ISIS WLLs. Both bugs only occured in earlier builds of the July 2007 release (ie. they do not exist in the June 2006 release or earlier).

2. A new option is available when reading Code polygons when linking one 2D domain within another 2D domain. If INVERT is specified when reading code polygons in the .tgc file (eg. "Read MI Code Invert ==" or "Read MI Code BC Invert =="), then the active/inactive status of any Code polygons are inverted (reversed), ie. a Code of 1 becomes 0, and a Code of –1 or 0 becomes 1. This means that the same 2d_bc (or 2d_code) layer can be used by the .tgc files for both 2D domains (ie. in one .tgc file INVERT won't be specified and in the other it will be). Note also that the same layer containing the 2d_bc "2D" lines can also be read by both the .tbc files.

3. For TUFLOW 2D domains linked to an external 1D scheme (eg. ISIS or XP-SWMM), the _MB.csv file is now not written (as mass balance information from the external 1D scheme is presently not yet being sent through, this file was misleading). Also note that the Qi, Qo and dV values on the Console Window are only for the 2D domain(s) (ie. they do not include any flow data from the external 1D scheme).

Build 2007-07-BC: November 14, 2007 (top)


Build 2007-07-BC corrects a bug that incorrectly applied negative direct rainfall (Read MI RF command) to model infiltration or evaporation (previously no infiltration occurred). It also corrects a bug in the mass balance reporting if using negative direct rainfall. Otherwise, it is identical to 2007-07-AF to BB.

Build 2007-07-BB: Not Uploaded (top)


Build 2007-07-BB allows the TUFLOW Tutorial 2D/2D Linking model (Module 06 in the 2007 training courses) to be simulated without the need of a dongle. Use Build 2007-07-BC or later.

Build 2007-07-BA: October 4, 2007 (top)


Build 2007-07-BA recognises additional Dongles U0701 to U0720. It is computationally identical to 2007-07-AF.

Build 2007-07-AF: September 10, 2007 (top)


Build 2007-07-AF is an upgrade to 2007-07-AA/AB/AC/AD/AE. It is computationally identical to 2007-07-AE. The main change is:

1. Minor bug fix to the 2D mass error reporting along 2D H boundaries in the _ME.dat file. The _ME.dat file and the ME flag have also been changed to MB1 - search updated manual for "2007-07-AF".

Build 2007-07-AE : September 6, 2007 (top)


Build 2007-07-AE is a mandatory upgrade to 2007-07-AA/AB/AC/AD. It includes a minor bug fix and enhancements to previous July 2007 builds. This upgrade does not affect backward compatibility to builds prior to July 2007, and is computationally the same as Build 2007-07-AC (except if affected by Point 2 below). The main changes are:

1. Minor bug fix in Build 2007-07-AD that set the projection line in .mif files to "WARNING" if the new command MI Projection Check == WARNING was specified.

2. 2D HQ boundaries using the automatic stage-discharge curve option now take into account the variation in Manning's n with depth feature when calculating the stage-discharge curve. Previously, the Manning's n at the lower depth was used at all depths. This enhancement only applies if Defaults == PRE 2007-07-AA or PRE 2006-06-AA is not specified.

3. The Manning_n attribute in the uvpt_check.mif file is now set to the Manning's n value at the higher depth for materials that vary Manning's n with depth.

4. The _n.dat output (Manning's n) has been improved so that it now caters for the new feature (Bed Resistance Cell Sides == INTERROGATE) that assigns Manning's n values directly to the cell mid-sides.

Build 2007-07-AD: August 31, 2007 (top)


Build 2007-07-AD is an upgrade to 2007-07-AA/AB/AC. It includes several minor bug fixes and enhancements. This upgrade does not affect backward compatibility to releases prior to July 2007 and is computationally the same as Build 2007-07-AC (except if Point 2 below applies). The changes are:

1. The new MI Projection Check command now also includes the “Bounds” values, as having different bounds can affect the decimal precision used by GIS/CAD software when writing .mif files, which can affect the TUFLOW test for snapped (connected) objects. A bug that caused the MI Projection Check to sometimes fail was also fixed.

2. If the 1d_nwk attribute No_of_Culverts was set to zero for C and R channels, a single barrel was assumed for the culvert flow calculations, but the storage contribution of the culvert was zero. Build 2007-07-AD now applies a single barrel storage contribution if No_of_Culverts = 0. This change does not apply if using the Defaults == command to ensure backward compatibility.

3. Qi, Qo and dV values displayed to the Console Window are now rounded to the nearest integer (previously rounded down).

4. Several new WARNING messages for detecting inconsistent 1D pit connections to 2D domains.

5. Bug fix that correctly outputs Message 2050 at the pit XY location (was previously placing the message at coordinates 0,0).

6. New ERROR message triggered for any 1D channels that have an invert less than -99998m (this usually indicates an unassigned invert value). Only issued as a WARNING if using the Defaults == command.

Build 2007-07-AC : August 20, 2007 (top)


Build 2007-07-AC is a mandatory upgrade to 2007-07-AA/AB. It includes a bug fix and enhancement for a couple of the new features in the July 2007 Release. This upgrade does not affect backward compatibility to releases prior to July 2007. The changes are:

1. Bug fix that occurs if using the new interrogate materials at the cell mid-sides in combination with varying Manning's n with depth feature.

2. Major enhancement to culvert stability. Only applies to the Culvert Flow == Method D option (the new default).

3. Minor bug fixes to _messages.mif layer associated with the new numbering system.

Build 2007-07-AB : August 14, 2007 (top)

Build 2007-07-AB is computationally the same as 2007-07-AA, but includes the following bug fixes.

1. The new WLLp Interpolate Bed command when set to ON (the default) caused an incorrect calculation of the relative resistance at the WLL bed point. This fix correctly calculates the velocity distribution across a WLL for output display purposes if WLLp Interpolate Bed == ON. Note: this does not affect the hydraulic computations, only the velocity output across 1D WLLs.

2. For 2D only models (ie. no .ecf file), the _TS.mif layer is now output if there is any 2d_po input layers. Previously, the _TS.mif layer was created, but no time-series data was written to the layer for 2D only models.

Build 2007-07-AA: August 3, 2007 (top)


The July 2007 TUFLOW release is now available and downloadable from TUFLOW Executables, and the manual from TUFLOW Manual. Other key initiatives are:

  • New TUFLOW Forum: The TUFLOW Forum offers TUFLOW users (and prospective users) the opportunity to ask questions, post replies, and search postings. Forum members are also notified of software updates and other announcements. To register for the forum please click here.
  • TUFLOW Tutorial Model: A documented tutorial model will be available by the end of August for downloading from this website. You'll be able to carry out TUFLOW simulations of the tutorial model using the July 2007 release without the need of a TUFLOW licence. The tutorial is in this first edition is based around using the MapInfo/Vertical Mapper software.
  • TUFLOW Utilities: A range of new and updated utilities, including a trial version of the greatly enhanced MapInfo Tools. Visit Utilities Downloads for more information.
  • New Web-Page Upgrade during August.

New Features (top)


The July 2007 TUFLOW release contains a wide range of new features and enhancements, some of which are listed below. For more details refer to Section 10 of the manual (or click on the hyperlink on the manual's front page).

  • Rapid Interrogation of Polygons: Interrogation of GIS polygons is now much faster than in previous releases, thereby substantially reducing startup times for most large models.
  • Comprehensive Mass Balance Reporting: There are major enhancements to mass balance reporting to allow detailed analysis and identification of any problematic locations within your model.
  • 1D/2D Linking: Improved and smoother application of 1D water level profiles to 2D HX link lines, thereby enhancing stability and results.
  • Culvert Routines: Further improvements to 1D culvert solutions and transitioning between flow regimes, and a bug fix for Regime E.
  • High Resolution Sampling of Materials: Materials (Manning's n) values are now sampled at the 2D cell mid-sides as well as the centre, enhancing the hydraulic calculations and quality of output, particularly in urban environments.
  • MIF File Objects: MIF file objects are now not case sensitive, allowing use of MIF/MID files exported from a range of CAD/GIS software.
  • More Stable 2D Breach Modelling:> Improved stability for 2D variable geometry modelling.
  • 1D Structure Losses: Adjust or fix inlet/outlet losses on individual structures.
  • Terminate Simulation: Pressing Ctrl+C prompts the user to stop the simulation and, if accepted, terminates the simulation and writes all output files off neatly.
  • Network Licences: Major enhancements to network licence monitoring that means TUFLOW simulations will not be terminated if the network goes down, and if no licences are available at the start or during a simulation, TUFLOW will go into a holding pattern until a licence is available.
  • Simulation Logging: Logging of TUFLOW simulations has been extended so that the status of all simulations from the same dongle (standalone or network) can be logged to the same file over an intranet.

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