HEC-RAS 1D Sediment Transport 1D Sediment Transport User's Manual Entering and Editing Sediment Data Sediment Properties Options Current: BSTEM Options PDF Download PDF Download page BSTEM Options. Current page All pages BSTEM Options These options are only applicable to models with bank failure and toe erosion, using the USDA-ARS Bank Stability and Toe Erosion Model (BSTEM). BSTEM has a separate manual and these options are described in that manual. ×