Manipulate data prior to further analysis.
One common use is to take year-round data and screen out seasonal data, such as for performing an IDF analysis of winter-only precipitation data. Another use is to perform a low-pass filter to remove data below a selected threshold (e.g. eliminate all rainfall with intensities below 0.05 inches per hour.) The fixed column width output facilitates transfer of data to other programs.
This option ignores blank lines in the data and treats blank precipitation entries as zeroes. Data files with blanks lines or missing columns may produce unexpected results or cause other components of NetSTORM to fail. It is a good idea to process data that has been produced in another program using this option before using it elsewhere in NetSTORM.
NetSTORM-format files may be exported to SWMM5 (USEPA, 2003) format using this option. The output file has two header lines and standard U.S. date-time format:
01-14-2003 02:00 0.01
02-07-2003 09:00 0.01
02-09-2003 05:00 0.02
This option assumes that the source data has a single gage ID.
The Pad Zeroes option creates a continuous time series from rainfall or other discontinuous data. The time interval specified should match the reporting interval of the existing data. This option cannot be combined with other operations such as rescaling or export to other formats.