How do I model siphon and spill-over

[chigozie_onyeuk]

I have a combined sewage drainage project in which it has been decided to cross a canal underneath the floor bed(thus using a system of siphon). The project is to convey a media discharge of 7.40l/s and a maximum of 30.0l/s. It is decided to divert any discharge above this figure(30.0l/s) through a short pipe(spill-over) as to discharge into the canal because at this level of discharge(during rainfall), the sewage must have been diluted to the extent that it is safe to discharge into the canal.

I would like to know which object (or how) in stormnet , I can model the siphon and the control system which will allow only up to the discharge of 30.0l/s to flow into the system, as such which will enable me to model the condition under which I can discharge the excess into the canal as spill-over.

Teddy

[Chris Maeder]

Teddy:

You can model this situation with a "multi-link". Simply define a junction at both ends of the siphon. Then, define one link to represent the siphon. Then, define another link to represent the spill-over. You can represent the spill-over as a weir link if you want, or as an open channel link.

Alternatively, you could represent the upstream side of the siphon as a flow diversion, and then simply define the cut-off flow where you want flow to discharge as excess spill-over. This is extremely easy to setup.

Also, StormNET allows you to add controls to pipes and other links to allow them to open and close (as well as do other operations) in real time. Contact me directly and I can send you some example models that demonstrate these capabilities in StormNET. Basically, StormNET can model real-time controls.

If you have any other questions, please let me know.

Sincerely,

Chris Maeder, M.S., P.E.
Senior Technical Engineer

[chigozie_onyeuk]

Please send me the example models that demonstrate these capabilities in StormNET. including the real-time model controls.
Teddy

[Chris Maeder]

I need to have your email address.

[chigozie_onyeuk]

My e-mail address is:chigozie_onyeuko@yahoo.com
Teddy