TUFLOW Simulation Speed: Difference between revisions
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* Large DEM and material grids can use up a lot of memory during model initialisation as the entire grid is read for processing. Re-tiling the grid into smaller sections will use up less memory as each smaller grid will be processed at the time avoiding high memory peaks.
* Inspecting .tlf file can help recognising which model features require the most RAM and more RAM efficient methods might be considered. For example, using gridded rainfall is more RAM efficient than using large number of rainfall polygons. Other features such as soil infiltration, hazard outputs and output zones all require additional memory.
* Grid (raster) outputs from TUFLOW (including DEM check files and Map Output Formats ASC, FLT, NC, TGO and WRR), require significant memory for storing interpolation factors. An interpolation is required as these outputs are all north-south aligned, while TUFLOW models can include rotation, water level lines and varying cell sizes. By default the grid output resolution is half the 2D cell size. Increasing the output cell size with the .tcf command <font color="blue"><tt>Grid Output Cell Size </tt></font> <font color="red"><tt>==</tt></font><tt> <grid_output_cell_size></tt> can reduce the amount of memory required for this. Refer to
Other processes can slow TUFLOW simulations down if they are competing for resources. A few potential causes:
* Running another model at the same time (as the CPU RAM is shared between both simulations)
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