HEC-RAS 1D Sediment Transport Hydraulic Design Functions Current: Sediment Transport Capacity Calculator PDF Download PDF Download page Sediment Transport Capacity Calculator. Current page All pages Sediment Transport Capacity Calculator The Sediment Transport Capacity HD function computes capacity at each cross section with several transport functions.The User Guide for this feature is in the main HEC-RAS page.You can access the user guide: here. ×