I am working on a hydropower project. I have modelled weir but Now have to model Lateral structure. Its an intake structure consisting of 5 gates. Gates will allow flow to enter into tunnels. I am new user of HEC-RAS. Can anybody tell me how to model it.
The best thing for you to do at that stage would be to read through the Users Manual and Hydraulic Reference manual where they address lateral structures. Then open up one of the lateral structure example projects and see how its done.