I wanna ask..why my HGL profile drop after junction exit
This is an open channel system and boundary condition is tidal wave (max : 1,06 m)
Dimension upstream channel = downstream channel ( width = 3 m and height = 1,75 m) --> main channel
There's another channel that enter the same junction with smaller dimension than the main channel
Hydrologic model : EPA SWMM
Hydraulic Routing : Hydrodynamic