Revision as of 10:54, 1 March 2023 view source Pavlina Monhartova (talk \| contribs) Bureaucrats, Administrators 5,387 edits →How to do hydraulic modelling with scarce site data? ← Older edit		Revision as of 10:57, 1 March 2023 view source Pavlina Monhartova (talk \| contribs) Bureaucrats, Administrators 5,387 edits No edit summary Newer edit →
Line 122: == 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> ~~== Can I use SRTM data for modelling rivers if no other sources are available? ==~~ SRTM is a very coarse grid. May be suitable of catchment discretisation of large catchments (100km2+) but generally should never be used for 1D or 2D flood modelling. For river bathymetry, SRTM or LiDAR won't penetrate accurately below the water surface so ground survey or bathymetric survey will be required. For the floodplain SRTM data may able to be used, provided its vertical accuracy is checked against ground survey data (SRTM is usually very inaccurate in the vertical). For this reason, approaching local agencies if they have bathymetry data (Local Council, County or State Department) might be the next step. In some countries these agencies host the data online for download.<br> <br>

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