System, and flows are modelled in one direction only (i.e., either Tree-like, the street system slopes in the same direction as the sewer Routing option can be used only if the two drainage systems are System if one takes the effort to set it up properly. Regarding Bill Lucas' question, yes, SWMM can model a "dual drainage" Have I modeled my nodes wrong, or am I misinterpreting the output?
![pcswmm modeling storage node weit overflow orifice pcswmm modeling storage node weit overflow orifice](https://www.chijournal.org/images/journal/C446-1.png)
How is this possible if flooding is indicated at junctions in the Status Report? I would have expected that open nodes would have a volume of flooding and rate of overflow as the depth exceeds the ground elevation, and that closed nodes would have a zero volume and zero rate of overflow as water should be contained within the system.įurthermore, if I run a query on Nodes with Flooding Above 0, it returns zero items found. Closed nodes (junctions/fittings) report a Max Depth equal to the diameter of the pipe and a Total Minutes Flooded however, Total Flooding (acre-in) is a positive number and Max Flooding Overflow (CFS) is a positive number.Open nodes (manholes/inlets) report a Max Depth greater than the distance between invert and ground and a Total Minutes Flooded however, Total Flooding (acre-in) is zero and Max Flooding Overflow (CFS) is zero.
![pcswmm modeling storage node weit overflow orifice pcswmm modeling storage node weit overflow orifice](https://i0.wp.com/swmm5.org/wp-content/uploads/2018/07/image027.jpg)
To represent open nodes I provided invert elevation, Max Depth equal to distance from invert to ground, Initial Depth of zero, Surcharge Depth of zero (my understanding is this means that flooding occurs when depth exceeds Max Depth), and a Ponded Area of 100 square feet.Īfter running the model, the Node Depth and Node Flow summaries in the Status Report indicate the following:.To represent the closed nodes I provided invert elevation, Max Depth equal to diameter of inflow/outflow pipes, Initial Depth of zero, Surcharge Depth of zero, and Ponded Area of zero.I have two types of junctions represented in my model: junctions representing pipe fittings and transition sections (closed node with no opportunity for water to leave the system) and junctions representing manholes/inlets (open node with potential for surcharging/ponding). I have constructed a model to represent an urban storm drainage network to identify segments with insufficient capacity and surcharging manholes/inlets.
![pcswmm modeling storage node weit overflow orifice pcswmm modeling storage node weit overflow orifice](http://3.bp.blogspot.com/_bZpPqUkdxzE/TTo13zF2SlI/AAAAAAAABnc/apgiKYSVCjo/s1600/Cutoff_Divider.png)
I am fairly new to SWMM modeling and am looking for some help clarifying some output data.