TUFLOW 2D Cell Size Selection

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Cell size convergence is an important concept in flood modelling.


Rural Catchment Scenario Assessment

Rural Model Description

This test is designed to simulate flood wave propagation down a river valley following the failure of a dam. The valley DEM is ~0.8 km by ~17 km and the valley slopes downstream on a slope of ~0.01 in its upper region, easing to ~0.001 at lower elevations.
Mesh Converge Model Description 001.png
Mesh Converge Model Elevation 001.png
The inflow hydrograph shown below is applied as a boundary condition at the upstream end of the valley.
Mesh Converge Model Inflow 001.png

Rural Assessment Results

Cell Size Location 4 Result Location 5 Result Mesh Resolution Figure
10m Mesh Converge Exg P4 010.png Mesh Converge Exg P5 010.png Mesh Converge Grid 010.png
20m Mesh Converge Exg P4 020.png Mesh Converge Exg P5 020.png Mesh Converge Grid 020.png
50m Mesh Converge Exg P4 050.png Mesh Converge Exg P5 050.png Mesh Converge Grid 050.png
100m Mesh Converge Exg P4 100.png Mesh Converge Exg P5 100.png Mesh Converge Grid 100.png
150m Mesh Converge Exg P4 150.png Mesh Converge Exg P5 150.png Mesh Converge Grid 150.png
200m Mesh Converge Exg P4 200.png Mesh Converge Exg P5 200.png Mesh Converge Grid 200.png
250m Mesh Converge Exg P4 250.png Mesh Converge Exg P5 250.png Mesh Converge Grid 250.png

Urbanised Catchment Scenario Assessment

Rural Model Description

Urban Assessment Results

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