Civil 3D and SSA Workflow - Detention Pond Design Workflow

This is the second of three episodes. This episode is called “Detention Pond Design Workflow”. In this episode we will go through a workflow to design detention ponds in Civil 3D and SSA (Storm & Sanitary Analysis).

[laurenalivia]

Couldn't have finished my project in SSA without you. Thank you!

[marcelinodiaz]

This tutorial is explained very well and explains everything step by step! Thank you so much for making this tutorial! It has been extremely helpful!

[lingdar]

Thank you. This is one of the best tutorials I have ever used. I need to learn SSA and CAD for my work and this taught me a lot.

[jacobsidian]

Very helpful video John, thanks again!

[donnydorito]

Fantastic video. I gotta design a retention basin this week and this is a big help!

[one-eyejawa]

Really great but I wish the pond outflow had options like Hydraflow extension where you can make adjustments and see in real time the outflow conditions for each storm event

[lk]

Thank you for this great video just have the following question concerning the sub base entry why the average was checked instead of the weighted average (area percent ) or one of the of the other options thank you again

[karinabrenes]

Hello Mr. John, excellent video, thank you very much for sharing it.
I have a question, when you configure the time of concentration for the post development you only configure the sheet flow and the shallow concentrated flow but you do not consider the 5 minutes of channeled flow from the road to reach the pond, the total time shown in the tab The report is 12.64 but you do not consider the 5 minutes of channeled flow, is it something you forget or is it not really considered? Thanks in advance

[eltionmema]

Hi John! Thanks for sharing your tutorial.
I have one question.

In the “Time series” I put for the fist time (1) “Rainfall Deep” 50 mm in “Unit intensity” San DIEGO 24-hr and the second time (2) “Rainfall Deep” 50 mm in “Unit intensity” Florida DOT 24-hr.
"Rainfall Deep" are the same, "Physical Properties" for Subbasin are the same, but in the "Time Series Plot", Total Inflow Volume (m3) is not the same for different cases.


In the "Project Options", I chose the EPA SEMM Hydrology method, SCS Curve Number and Constant flow.


Why “Total Inflow Volume (m3)” is not the same for different cases (1) and (2)?, in the same “Rainfall Deep” (mm) in Subbasin.

[afrasiabmirawdaly]

Thank you John Sayre. It is the best video tutorial I ever used to teach myself SSA. I have one question, I am using SSA 2018, when I am connecting a pond to the outfall with an orifice and a weir then, run analysis, it gave me error and said outfall has more than 1 inlet link or and outlet.

[pearlsibisi]

Hi John, Thank you for the video. Is there any way to design for the 1:200 year storm event using the rainfall designer? I noticed that it ends on 1:100 and I would like to analyse other return periods.

[edonmorina]

Hello sir! Great video! I am having trouble to find the Qpeak rate, because when i calculate my time of concentration and curve number is not showing what my peak runnof is after i select the storm return period. Instead it is a peak runnof factor below the outlet node in my subasin properties which makes it a little different from your subasin window and my Qpeak is always zero.

[sofialeaoc]

This is gold! Thank you so much for the video! ;]

[FranCoVids]

So, what is the setup for an infiltration pond design? Also, how can you obtain the treatment flows?

[joeymoreno]

Hi John, thanks for this video. I have a question. Is there a way to model a Stormwater manhole that over flows to a pond whenever the storm is 100 year event?

[pakcivilsurveyor]

Good .
Sir i want you make one video on designing topic.
How designing in cad after the topography survey of the any place socity etc...

[GracioPermata-wmxi]

I can't make it work to have two orifice. It has that drainage system has no acceptable outfall nodes and outfall xxx has more than 1 inlet.

[michaellardi]

Trying to make the switch to SSA b/c I can see the benefits of having the entire storm design within a single model. 

Is there a way within the TR-55 Hydrology method to calculate SEPARATELY pervious and impervious coverages within a subbasin (rather than using a composite CN)? This requirement is written into many SWM ordinances in my neck of the woods, and I haven't been able to find a way to leverage the data entered into the Runoff Coefficient input window to get these results. The only work around we've seen is creating separate subbasin nodes for each coverage (sub-optimal approach).

[mikekan]

Thanks John . How can i get the sample file?

[sammydozer]

Good stuff, thank you! Question: When your setting the parameters for pre-development, the Flow Length should be whatever it currently is in its natural state, not what the standards say (100-300 (ft))? Right, this is natural state.