ARR 2019 Ensembles Processing: Difference between revisions

The Australian Rainfall and Runoff (ARR) 20162019 guidelinesguideline requirerequires the use of ten temporal patterns to be applied for each design Annual Exceedance Probability (AEP) and storm duration combination. This multiplies the required number of design simulations by ten and requires additional processing incompared comparison withto the previous approach recommended in ARR 1987. As a consequence, the model result folders can get very large and the post processing of the results can be time intensive. The below page provides recommendations to minimise the effort and footprint of running TUFLOW for using the latest ARR 20162019 guidelinesguideline ensemble approach.

As the model result folder can get large in size with the additional simulations, the preferred method of maximum grid output format is to use FLT, which can be done directly from the TUFLOW simulation. FLT files are ESRI binary (float) version of the ASC files and, their size is about 1/5 of an ASC file. Binary files can also be processed faster by TUFLOW utilities.<br>

If using only time-series outputs (xmdf, dat) an extra step will be required to exportcreate these maximum grids (FLT or ASC). This can be done withusing TUFLOW_to_GIS utility.

Use <u>[https://wiki.tuflow.com/index.php?title=ASC_to_ASC#.22-statMedian.22 ASC_to_ASC utility (-statMedian switch)]</u> to create the median result of required valuesoutput (water level, depth, velocity, hazard, ...) for each AEP and storm duration combination.

Use <u>[https://wiki.tuflow.com/index.php?title=ASC_to_ASC#Maximum ASC_to_ASC utility (-max switch)]</u> to create the maximum envelope of the median results for each AEP.

*BatchThe location of the batch file is recommended to be located in the same folder as the result files. This will enable the use of relative path for the input and output files to make the command syntax shorter.<br>