Version 6.1 Can Only Use 1D STEADY Flow Results

The version of the Riprap calculator in HEC-RAS 6.1 can only use steady flow data.  The calculator will actually crash if it is opened with an unsteady flow plan.  Convert the unsteady flow profile to steady to compute results.  

Version 6.2 will be compatible with unsteady simulations.

HEC added the Riprap and Scour calculator to HEC-RAS version 6.1.  This tool computes riprap size and gradation and the potential toe scour that the design must account for.  An introductory video and the files used in that video are included below.