AutoCAD Civil 3D - Stormwater

[#1]

My company uses alot of perforated pvc pipe in a stone trench, as an underdrain in alot of our projects. As the recent graduate from University I have been tasked with learning SSA and how to model some of our more complex designs. I seem to have a handle on most of the software except for how to model this piece of pipe.

I am just wonder what is the best way to model these in SSA, as they are both storage and inlets.

Thank you for your help.

[#2]

You could look at all the pipe as a storage area with multiple horizontal orifices.

[#3]

How about the case for an 'Enhanced Water Quality Swale', where the stored water needs to infiltrate through an engineered sand filter to an underdrain connected to the rest of a storm drain system. Because of the prescribed infiltration rate (1.5in/hr) of the sand material (30" deep), there is a substantial delay between the time the first drop hits the swale to the time the first drop reaches the underdrain. I've been at a complete loss to figure out how I can get SSA to model this properly.

[#4]

Was this ever resolved? I am in the same situation. I am trying to model stormwater sanfilter that has sand media and a perforated underdrain pipe beneath it. I have no clue how to model it in SSA. Any suggestions Autodesk?

Thanks,

KD

[#5 · Accepted solution]

Perforated trench can be model as underground pipe storage. That can be define in Storage curves

[#6]

This is how I ended up using this, just determine the overall storage available and used it as a storage curve.