Introduction
This Google Group contains a SWMM 4 to SWMM 5 Conversion Program that can be used to convert SWMM 3, SWMM 3.5 and SWMM 4 data files to SWMM 5. The Visual Basic code is also included as a downloadable zip file. This version of the converter has added features for converting SWMM 3.05, SWMM 3.5 and SWMM 4 Transport and Storage Treatment files as well fixes for the import of files that use the JELEV option and open channel cross section data.
SWMM 3,4 to 5 Converter
Another SWMM Conversion Web Site and Further Information
SWMM5 Google Site
A few other changes are:
- Intial depth adjustment for Y0 fixed.
- E2 line depth adjustment altered for no E2 lines with no data.
- defaults for PCTZER and REGEN
- account for type 27 elements in the Transport conversion
- E3 instead of E2 for the reading of Runoff Hyetographs
- Bridge data reading and some translation in SWMM 5
- add the reading of SWMM 3.5 Extran files
- use the actual invert and not the ground elevation for D1 lines
- Fix for the translation of E2 lines from SWMM 4 to SWMM 5
- Transport Table Fix for G lines of SWMM 4
- export vertices for multiple conduits
- default wet and dry step for Transport
- no more airtemp export
- do not print out the rainfall time series name called Series
- RUNOFF_REGEN export changes for new SWMM 5 format
- substitute the NGA node if a GA line with a node number was found' on the GA line of SWMM 3
- G1 export of a default weir width of 1
- TRIANGULAR weir export adjustment
- IRREGULAR shape export adjustments
- rectangular closed not rectangular for exported data
- flip width and depth in the export for trapezoidal data from Runoff
- default x, y coordinates for runoff nodes if none available
- GEOM3 is a double and not a string in the reading of Transport data
- rtk pattern export adjustment for SWMM 5
- shorten the orifice name to OR ; shorten the orifice name getting rid of the number; find duplicate orifices
- shape = "FILLED_CIRCULAR" for SWMM 4 Sedi
- export dhmin in the first column of the snowpack data; add the correct forms of tbase to the saved swmm 5 file
- export the FX line data
- shorten the pump name to PUMP; shorten the pump name getting rid of the number and find duplicate pumps
- ADD the export of user comments from runoff
- add the input of pz from the H1 lines of Runoff
A new look to the converter....

New Radio Buttons for Converting SWMM 3 OR SWMM 4 Files.
Other SWMM Related Websites
SWMM 3 and 4 Conversion to SWMM 5
SWMM 4 and SWMM 5 Information
SWMM 5 Other Information