TUFLOW 2D Cell Size Selection: Difference between revisions

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= Test Case 2 - Urbanised Catchment =
This test case uses a hypothetical urban model. The model encompasses the entire catchment and covers an area of approximately 21miles2 (54km2). Development within the catchment ranges from rural undeveloped in the mountainous upper catchment andto dense urban development in the lower catchment. <br>
[[File:Mesh Converge Direct Rainfall Topo.png|700px]][[File:Mesh Converge Direct Rainfall Manning n.png|700px]]<br>
A direct rainfall approach has been used, applying rainfall directly to every cell within the model. The event hyetograph is a hypothetical 24 hour extreme event. The simulation duration has also been set to 24 hours.<br>
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== Test Case 2 - Results ==
The cell convergence test results are summarised in the table below. They have been presented in a histogram form. The histograms are calculated by subtracting the peak (maximum) flood level result raster grid for the larger cell resolution simulation from the 10ft cell resolution result. The result difference has been sampled fromat every pixel in the raster datasets where flood information is present in both result files (ie. they overlap).<br>
 
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