HEC PROSPECT Training Materials Current: #352 - Advanced 1D/2D Modeling with HEC-RAS PDF Download PDF Download page #352 - Advanced 1D/2D Modeling with HEC-RAS. Current page All pages #352 - Advanced 1D/2D Modeling with HEC-RAS For the HEC-RAS 2D Unsteady Flow class material, please go here.For additional HEC-RAS training materials, please see the HEC-RAS Training home space. ×