I think everybody is getting lost in the reeds and that may be my fault for not articulating the problem well enough. The extreme example is just to illustrate a point. I could have said that 10 cfs enters the inlet and 0.10 cfs bypasses. It doesn't matter what the actualy values are, because...
Beej67: Thank you for your comments.
You are correct. You can specify the bypass to go into another downstream inlet. But what happens to the Tc throughout the system? It will stay the same to the outfall, because the software cannot know what the overland flow time is from one inlet to...
The reason for my questions is that one of the SD requirements at local municipality requires the inlet bypass to enter the system at the next downstream inlet. but the problem is you end up having to mix and match different Tc. The inlet bypass is based on a Tc= 15 min. but the SD system...
Thank you for your comments, but what happens to the bypass? At the inlet, Q=CiA, not Q=CiA-Bypass (the Q=CiA-Bypass is only true for inlet spacing).
And at the next junction, Q=CiA (where Tc increases and i decreases) but not Q=CiA-bypass.
So, HEC-22 states implicitly 100% pickup at the...
I will start off with a hypothetical example, and then ask my questions rearding stormdrain design procedures.
The hypothetical example is this: there is a single storm drain system with a single on-grade inlet at it terminus. The inlet bypasses offsite. The drainage area to the inlet is...
