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ARR 2019 Ensembles Processing: Difference between revisions

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This page summarizes recommended approach for processing a large amount of ARR 2016 ensembles.
==Introduction==
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.
 
==Choice of Output==
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>
Commands in the TCF:<br>
:<font color="blue"><tt>Map Output Format </tt></font> <font color="red"><tt>== </tt></font><tt>FLT</tt><br>
:<font color="blue"><tt>Map Output Date Types </tt></font> <font color="red"><tt>== </tt></font><tt>h, d, V</tt><br>
:<font color="blue"><tt>FLT Map Output Interval </tt></font> <font color="red"><tt>== </tt></font><tt>0</tt><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.
 
==Median==
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 storm durationAEP and eachstorm AEPduration combination.
 
==Maximums==
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.
==Processing Batch File Tips==
*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>
:<u>Example:</u><br>
:This method would be preferredpreferable:<br>
:<tt>"C:\TUFLOW\Utilities\asc_to_asc_w64.exe" -b -out ARR_Max.flt -max ARR_060m.flt ARR_120m.flt</tt><br>
:Instead of this method:<br>
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*A wild card (*) can be used to avoid typing all the file names. Instead ASC_to_ASC utility will automatically read all the files with the same start and end of the filename.<br>
:<u>Example:</u><br>
:This method would be preferable:<br>
:<tt>"C:\TUFLOW\Utilities\asc_to_asc_w64.exe" -b -out ARR_Max.flt -max ARR_*.flt</tt><br>
:Instead of this method:<br>
:<tt>"C:\TUFLOW\Utilities\asc_to_asc_w64.exe" -b -out ARR_Max.flt -max ARR_060m.flt ARR_120m.flt ARR_180m.flt ARR_240m.flt ARR_300m.flt ARR_360m.flt</tt><br>
*Looping through variables in a batch file can also be used to make the processing more efficient. Example of such batch file is below:<br>
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