TT153: Quadtree and Sub-Grid Sampling (SGS)

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!

Overview

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.

Dates

Almost Full

TT153C: Quadtree and Sub Grid Sampling - Brisbane (6 Mar) - Almost Full

6 March 2024 - 09:00 (AEST) ,
ends: 6 March 2024 - 12:30 (AEST)

Time: 9:00am (Brisbane, Australia)
Location: BMT, Level 5, 384 Edward St, Brisbane, QLD 4000
Duration: 3.5 hrs
Cost (pp): AUD $700 (ex GST)
Max class size: 12

Registration Form
Available

TT153C: Quadtree and Sub Grid Sampling - Melbourne (17 Apr) - Available

17 April 2024 - 09:00 (AEST) ,
ends: 17 April 2024 - 12:30 (AEST)

Time: 9:00am (Melbourne, Australia)
Location: Karstens, 123 Queen St, Melbourne, VIC 3000
Duration: 3.5 hrs
Cost (pp): AUD $700 (ex GST)
Max class size: 12

Registration Form
Available

TT153O: Quadtree and Sub Grid Sampling - AUS - Online (12 Jun) - Available

12 June 2024 - 10:00 (AEST) ,
ends: 12 June 2024 - 13:30 (AEST)

Time: 10:00am (Brisbane, Australia)
Location: Online

Duration: 3.5 hrs
Cost (pp): AUD $550 (ex GST)
Max class size: 6

Registration Form
Available

TT153O: Quadtree and Sub Grid Sampling - UK - Online (26 June) - Available

26 June 2024 - 10:00 (GMT) ,
ends: 26 June 2024 - 14:00 (GMT)

Time: 10:00am (London/UK)
Location: Online

Duration: 3-4 hrs
Cost (pp): £250 (ex VAT) / €300 (ex VAT)
Max class size: 6

Registration Form
Available

TT153C: Quadtree and Sub Grid Sampling - Perth (13 Nov) - Available

13 November 2024 - 09:00 (AWST) ,
ends: 13 November 2024 - 12:30 (AWST)

Time: 9:00am (Perth, Australia)
Location: Karstens, Level 1/111 St. Georges Terrace, Perth, WA 6000
Duration: 3.5 hrs
Cost (pp): AUD $700 (ex GST)
Max class size: 12

Registration Form
Available

TT153C: Quadtree and Sub Grid Sampling - Auckland (11 Dec) - Available

11 December 2024 - 09:00 (NZDT) ,
ends: 11 December 2024 - 12:30 (NZDT)

Time: 9:00am (Auckland, NZ)
Location: Karstens, Tower 1, Level 4, 205 Queen St, Auckland 1010
Duration: 3.5 hrs
Cost (pp): NZD $700 (ex GST)
Max class size: 12

Registration Form
Register Interest

Register Interest - Register Interest

If you can't find suitable option, please register your interest.

Registration Form

Content

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