SWMM5 infiltration

Hello all swmmers out there,

I was wondering if any of you had experienced the same difference when using SWMM5. I did a simple runoff example in SWMM 4.4(h) and built the same one in SWMM5, and found a problem I could not solve: I am aware of the current bugs in the conversion of mm/h in feet or inches, so I adapted that (dividing the rainfall amounts by 12) which worked. Apparently the slope is read as an absolute slope (as in SWMM4) instead of a % so I adapted that too.

But my results are still 5 times lower than the SWMM4 results. I think the problem may come from the infiltration method (I am using Green-Ampt), so I have been trying to adapt the hydraulic conductivity to match the runoff amount. I had to change my conductivity from 3mm/hr to 0.39mm/hr to get similar results. But the hydrographs look pretty different, so I still don't think this is the problem.

I don't know if I am doing something wrong, or if there is a bug I can't seem to locate.

Any help would be greatly appreciated!

My files are included here (the SWMM4 file is a PCSWMM file).

Alex Wilson.
CBCL Limited
alexanderw@CBCL.CA

We ran Alex's SWMM 4 data set through the new Beta B version of the SWMM 5 Converter and SWMM 5 program and there was complete agreement between the SWMM 4 and 5 results. As stated earlier, we will post Beta B on the EPA SWMM website sometime next week (when our webmaster returns to the office). Sorry for all of the problems encountered with Beta A, although that's made it a very rewarding beta test period for the SWMM 5 development team so far. We hope more of you will try out the program once Beta B is posted.

Lewis Rossman
U.S Environmental Protection Agency
rossman.lewis@epa.gov

Hi All,

Please help me identifying why the version of 4.4gu can not read the total conduit data. I would appreciate the help and the prompt response from any one.

Thanks,
Ashraf Ibrahim
aibrahim@SIGMAASSOCIATES.COM

Hello Ibrahim;

Change your SW and MM lines as below:
SW 1 0 0
MM 4 1 2 3 4

Enter Zeros for the STHETA and SPHI at the end of each C1 line.

You would then get the following error messages which you may correct as
you wish:

====> ERROR !!! JUNCTION 1025 REQUESTED FOR PRINTOUT IS NOT
CONTAINED IN JUNCTION DATA.


************************************************
* LINE-INPUT HYDROGRAPHS (DATA GROUPS K1-K3) *
*
*
* Expect 10 junction IDs on each K2 line. *
************************************************

NJSW INPUT LOCATIONS FROM K2 LINES:
5240 5230 5200 5090 2150 2150
2150
2100
2040 1150

*** ERROR! INPUT LOCATION 2150 IS DUPLICATED LATER IN K2 LIST.
ALLOW LOCATION TO BE USED ONLY ONCE. PROGRAM WILL STOP BELOW.


Good Luck!

Mostafa Bozorg-Zadeh (ICE)
bozorg@KOSAR.NET