I am very new to Hec Ras. It seems that we can define boundary condition for a 2D area and specify a flow hydrograph. This boundary condition sits in the border of the 2D area. I was wondering if there is anyway to introduce such a boundary condition inside the 2D area? The reason for doing this is to be able to introduce the surcharge from sewer network manholes in an urban catchment into the 2D area.