How to Decide on a Time Step in InfoSWMM
Note: How to Decide on a Time Step in InfoSWMM
Step 1: Your first guess was 300 seconds which had a very large continuity and unstable links. If you look at the your average time step a good time step would be 10 seconds based on your average time step of 2.6 seconds.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgi7tbscFQ8llBXCwnEhwaW24Dt7n-b9kSuPJvtSQhOR463Yse8ZbplsxzGTQluOJEtRuj_27s-xZvaQConqMeqE3uLIlH3fXJhwvTz3zRaKRGy9t2-1SLZ8eBBtmI5yYPyWrxAXZP4Nj0/s400/2010-12-08_1908.png)
Step 2: Run your model with a time step of 10 seconds and check the flows and the continuity error. In this case by using a maximum time step near the average time step you got rid of the continuity error and the unstable link flows.
![](https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjW0d2rKxnxZp1XeNowJ1ntvU3WFFRSBRyXHV0qCiRVT-TndBlD7I7sIlusVhjWodg9U3UTAKKvT-Yta9kEHfTMr3Yu-eNRF2p7lPHa2-Dt1coExzAxUOJqlP6zkGVBqitbmCXWekWQKck/s400/2010-12-08_1916.png)
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