TUFLOW General Discussion: Difference between revisions
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== How to check the flow in 2D model is the same as the source? ==
A mass balance is a good check on the model, e.g. with no losses the catchment area times rainfall depth should be the volume of water being applied as flow boundary to the hydraulic model. This is particularly important if using separate hydrologic and hydraulic models. If a sub catchment is missed or double counted then both the hydraulic model and the hydrologic model may show 0% mass error, but due to check for any errors a total volume check (Total in from source model - Total out from hydraulic model = Change in hydraulic model volume) should be carried out. In TUFLOW Plot Output lines can be included downstream of inflows to compare the hydraulic model inflow against the hydrology model results. For more information see our <u>[https://www.tuflow.com/library/webinars/#oct2022_quality_control Quality Control webinar]</u>.<br>
== How to do hydraulic modelling with scarce site data? ==
The best thing to do in this case is to build the model using industry standard values. Do sensitivity testing of model inputs to identify if the results change dramatically due to the modelling choices, e.g. cell sizes, inflows, boundary influences. After building the model, any opportunity to conduct community consultation is usually well worthwhile as the locals will have a feel whether the model is demonstrating the flood behavior they have observed. For more information see <u>[https://www.tuflow.com/library/webinars/#maximise_accuracy Maximising the Accuracy of Hydraulic Model webinar]</u>.<br>
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