in stormcad modeling, I wonder how can I design An open surface urban network that contains channels( or conduits) as main elements.In fact I need gutters to carry main flow and not just excess flow.
In general, gutters are only intended to model short runs of gutters between inlets/catch basins. If you are serious about modeling the surface network, you should use conduits than represent open or open channel links.
If this covers a large area such that rational method hydrology is not sufficient or have significant storage in ponds or depressions, then you should consider using a dynamic wave solver such as the solvers in CivilStorm. The peak flow solver in StormCAD does not account for flow attenuation over long distances. How large is the area you are modeling?
thank you so much for your help. Im working on A project which the related are is about 13000 ha. And I assume this is A big number!!!
my major problem is, more than half of the surface network is constructed and I need to consider them As existing conduits.and all of them are openflow channels( or conduits), like big gutters ( in shape of course)
It sounds as if you should be using a dynamic wave solver such as the explicit solver in CivilStorm or SewerGEMS.
Each of the network links can be modeled as Conduits with a Section Type corresponding to an open channel or a Channel element with the cross section described at the end points of each channel link.