All Discussions (425)

Sort by

Area of a Junction

Hi,

For a junction we specify the geometric data, but the area of a junction is not an input.
Even though we don't specify it the program works. So how can we find the actual area of the junction?
We obviously know the height, but the area???
Thanks

Read more…
2 Replies · Reply by Upaka May 19, 2010

Negative flows

Hi,

 

Any guess why I am getting negative flow rates for the Link R14 at 00:15:00 minutes?

Find attached the input file.

 

I can't recognize what is the exact reason to get negative flows, where the minimum should be 0 m3/s,  even without a flap gate.

 

Tha

Read more…
3 Replies · Reply by Upaka Jan 25, 2011

SWMM 5.0 CN Values

I am trying to determine if I am using the proper CN Values for input parameters in SWMM 5.0.  I've used the NRCS runoff curve numbers in the input for each subbasin determined from weighted CN based on landcover.  Should the impervious be removed fr

Read more…
1 Reply · Reply by Robert Dickinson Sep 26, 2010