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Subcatchment properties and node dimension

Posted by Vasenjka on June 15, 2012 at 4:28am

Hello!

What value would you suggest to use in Percent routed option? Does it stands only for impervious area or whole area, including pervious area?

Also, where can I add area of manhole (node actually)? I have conduit D=300 mm, and node Max Height 3,24; how can SWMM calculate when will surcharging occur without dimension of manhole area?

Thanks!

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Replies

Robert Dickinson June 15, 2012 at 7:11am

The default manhole area is 1.22 square meters, if you want to change that you can change it in Options under the Dynamic Wave Tab,

Normally, the percent routed is 100 percent to an outfall.

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