TUFLOW HR Output: Difference between revisions

For the HR output the water level at each HR output location is interpolated from the computed 2D water levels. The depth is the difference between the interpolated water level and the sub-grid elevation. This differs from the standard depth output which calculates the depths at cell centres and corners first, then interpolate the depths to the standard output grid locations(default is half the cell size). The difference in the interpolation process is illustrated below.

 

 

The advantage of the HR output is that it can retain the sub-grid detail of the terrain information even at coarse cell size. As compared in the example below, the HR depth output shows clear flow path even at 100m grid. However, nicer depth output does not mean reliable hydraulic result. In fact, the 100m cell size is too coarse to produce reliable/converged hydraulic results for any real-world flood model. It's is strongly recommended that the model convergence/benchmarking tests must be conducted based on the standard map output, and the HR output should be used for presentation purpose only.

 

 

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