This webinar uses a suite of case study examples to highlight how the above factors influence what should be considered an appropriate 2D mesh resolution for a range of catchment scenarios. In doing so it also demonstrates a best practice methodology that should be used by all practitioners at the start of a modelling project when deciding what 2D mesh resolution is necessary.

One size does not fit all. Hydraulic models need to be designed to suit the site-specific topography, hydrology and also study purpose. This webinar steps through a best practice workflow to guide your 2D hydraulic model design and build.

Appropriate 2D cell size selection is necessary to achieve accurate hydraulic modelling results. This webinar will help you make the correct choices.


Chris Huxley


Chris is a Principal Engineer for BMT (the developers of TUFLOW) with over 20 years’ experience in the field of flood / stormwater modelling and floodplain management. Chris is an expert in the fiel... Read more

Bill Syme


Bill has over 30 years’ experience working on riverine, estuarine and coastal studies, of which most have been in the flood hydraulics field.  During this time, he has successfully managed and led ... Read more

Selection of the 2D mesh resolution (also referred to as the 2D cell size) is a fundamental decision that is made at the start of all hydraulic modelling projects. The importance of this decision is sometimes not fully appreciated, and in some cases, based entirely on simulation runtime assumptions without consideration of the implications it can have on the overall accuracy of the flood modelling estimations. One size does not fit all! Result sensitivity to mesh resolution is a function of numerous aspects, including: topographic scale considerations, geometric complexity, flow regime and software assumptions. To further complicate matters, what is considered fit for purpose is also influenced by the desired end use of model results.


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