TUFLOW's 2020 release saw the addition of two new features, Quadtree and Sub-Grid Sampling (SGS). These two easy to implement features combined will revolutionise flood modelling in the coming years. They replace the need to 1D open channels nesting!
Quadtree and Sub-Grid Sampling (SGS) are set to revolutionise what is considered the standard flood modelling approach in the coming years. This is due to a number of non trivial reasons:
1) Quadtree allows for the refinement of cell resolution where desired. This feature is incredibly easy to implement. In many situations Quadtree will replace 1D open channel nesting previously used when the 2D model cell resolution was too coarse to adequately define in-bank geometry.
2) TUFLOW's implementation of SGS is unique for the industry. It removes all saw tooth sidewall loss artefacts, removing all sensitive to cell orientation assumptions in steep sidewall situations (common in urban settings). It also has excellent cell size independent accuracy. What does cell size independent accuracy mean? Where the topography is adequately defined, TUFLOW will produce consistent results irrespective whether the cell resolution if further refined. By comparison, other software with SGS implemented are far more sensitive to cell size assumptions in floodway regions, with slight changes in cell size causing significant changes in flood level! This is not a desirable trait, and is something the TUFLOW team spent over a year researching and testing to avoid during the development of SGS.
This course discusses the background behind the new Quadtree and SGS features. It also uses hands-on model update exercises to demonstrate how easy the features are to use.
This course is hosted online over Zoom and is run in one session 3.5 hours long. A short preparation session is also held in the week prior to the course to ensure all trainees have the necessary software and course data installed. This online course is limited to a class size of six trainees.
This face-to-face course is run in a classroom in 3.5 hours. The course is limited to a class size of twelve trainees.
Trainees should have TUFLOW modelling experience and/or have completed the introductory courses:
12 February 2025 - 10:00 (AEST)
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ends: 12 February 2025 - 13:30 (AEST)
Australia/Pacific Region
Time: 10:00am (AEST)
Location: Online
Duration: 3.5h
Cost (pp): AUD $600 (ex GST)
Max class size: 6
4 March 2025 - 13:30 (NZST)
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ends: 4 March 2025 - 17:00 (NZST)
Christchurch, New Zealand
Time: 1:30pm (NZST)
Location: Christchurch TBC
Duration: 3.5h
Cost (pp): NZD $750 (ex GST)
Max class size: 12
26 March 2025 - 09:00 (AEDT)
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ends: 26 March 2025 - 12:30 (AEDT)
Sydney, Australia
Time: 9:00am (AEDT)
Location: Karstens, 111 Harrington St, Sydney, NSW 2000, Australia
Duration: 3.5h
Cost (pp): AUD $750 (ex GST)
Max class size: 12
7 May 2025 - 09:00 (AEST)
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ends: 7 May 2025 - 12:30 (AEST)
Brisbane, Australia
Time: 9:00am (AEST)
Location: BMT, Level 5, 348 Edward St, Brisbane, QLD 4000, Australia
Duration: 3.5h
Cost (pp): AUD $750 (ex GST)
Max class size: 12
15 August 2025 - 13:30 (NZST)
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ends: 15 August 2025 - 17:00 (NZST)
Auckland, New Zealand
Time: 1:30pm (NZST)
Location: Auckland TBC
Duration: 3.5h
Cost (pp): NZD $750 (ex GST)
Max class size: 12
8 October 2025 - 09:00 (AEST)
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ends: 8 October 2025 - 12:30 (AEST)
Melbourne, Australia
Time: 9:00am (AEST)
Location: Karstens, 123 Queen St, Melbourne, VIC 3000, Australia
Duration: 3.5h
Cost (pp): AUD $750 (ex GST)
Max class size: 12
19 November 2025 - 09:00 (AWST)
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ends: 19 November 2025 - 12:30 (AWST)
Perth, Australia
Time: 9:00am (AWST)
Location: Karstens, Level 1/111 St. Georges Terrace, Perth, WA 6000, Australia
Duration: 3.5h
Cost (pp): AUD $750 (ex GST)
Max class size: 12
If you can't find suitable option, please register your interest.
Quadtree Mesh Modelling
Benchmarking
Feature activation
Quadtree level mapping
Automated mesh generation
Hands-on exercises
Sub-Grid Sampling (SGS)
Benchmarking
Feature activation
Approach to DEMs and TINs
Z Shape treatment
Sub-grid sampling sample distance options
Hands-on exercises
