Riser in a pond Storm and Sanitary Analysis

[bforr]

If I wanted to design an outlet for a storage node as a riser that has an influent opening at or near the invert and a grate on top with a 12" outfall pipe, what part to use?  Orifice?  Outlet? Something along the lines of the attachment.  From what I can gather from the Help on SSA the Orifice is simply a hole for outlet only.

Or should I be doing this in Hydraflow Hydrographs?

Keep in mind I am not an Engineer, simply a CAD operator.

[Hidden_Brain · Accepted solution]

in SSA, connect storage node to another storage node or a junction (this will be your outlet structure) using an orifice (for the primary), another orifice (for the secondary) and a weir for the top of the riser. the barrel will start at this outlet structure node and flow out.

[bforr]

I think that is a good representation for what I wanted to do.  I am going to run that and see what I get.  I will let you know how it goes.

Thanks for your help.

Bryan Forrest

Design/Drafting

Kyle Associates

[bforr]

Attached is a zip file of a Storm and Sanitary Analysis file.  This forum doesn't allow SSA .spf files to be attached.  Is the storage node and combination of orifices and weirs a good model of a 40' x 9' french drain with 2 perforated pipes at the bottom, a riser with a drain inlet, and an outfall subsurface drainage pipe.

 I think the storage node is modeled correctly.  Any critiques, positive or negative, will be welcome.

[Hidden_Brain]

i quickly looked at it, i think you need two (2) barrels based on your description above, you currently just have 1. adjust the stone widths etc to fit your detail. also, you have the drain to fill up for 5.5' before it leaks through an orifice, i assume that is what you require.

[bforr]

Thanks for taking the time to look at it.  Attached is the detail for what I am designing.  I am not quite sure I follow your reply.  The bottom of the French Drain (storage node) is set at 0 elevation and is 6' deep.  I have two orifices set at 0 elevation acting as two perforated pipes at the bottom of the drain.  I have a weir set at 5.5' acting as the drain inlet.  The three structures attach to a junction with an 18" outfall pipe. 

What two barrells are you refering to?  By adjusting stone widths you are refering to stone voids?

Kindest Regards,

Bryan