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/AVvXsEgxXe_AFM3Kk1CTl22xPelWGzNzF6122XsGpZPBjfmjCP9FkS_g9D62XUInFiHG-6NeWOqsHFZUMEFkZFKtr8xy-qfBW-mxyuLWToLp_xDObCo_F0XBZM0MHYYzuPFZGXXlMzybgQ-DURg/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/AVvXsEjt28F-q0Nkjvnpxr3NI59vOuYnbiysvGA1U24kraXM85AjblENUkTRFeXVsCqaSZFcTXfGO8k1dTtG2Lzx0Fq0d5bx5ySwJoXlEp8s953zq2YBFLmFj4rzIXLOCCiD4ConTgjzj0WtpDk/s400/2010-12-08_1916.png)
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