Dear SWMMers

As a beginner I would be happy to have more examples for the following topics:

- modelling off- and on-line storage tanks in EXTRAN (no quality)
- how to use the RAIN block with user defined rainfall data files

I have already modelled a CSO overflow with a side weir in EXTRAN. But I had to insert a small storage volume at the weir node to prevent instabilities during surcharge and flooding. Is there another workaround to prevent instabilities (I tried to reduce time step to 1 sec or to choose another calculation method but without success. Only inserting storage volume helped)?

I am using PCSWMM. Thanks in advance for any help.

Regards,

Rolf
fankhauser@EAWAG.CH