![]() This model coupling adds BSTEM’s lateral processes (geotechnical bank failure, groundwater lag and toe scour) to HEC-RAS’ vertical, deposition and erosion processes. HEC collaborated with Andrew Simon (Cardno) and Eddy Langendoen (USDA-ARS) to couple the HEC-RAS mobile bed model with the USDA-ARS Bank Stability and Toe Erosion model (BSTEM). USDA-ARS Bank Stability and Toe Erosion Model (BSTEM) The two major features are the ARS-USDA Bank Stability and Toe Erosion Model (BSTEM) and Unsteady Sediment transport. However, HEC also added a couple major new sediment features, as well as many minor features and a few substantial bug fixes (e.g. The new 2D features and mapping tools are the most anticipated new features in HEC-RAS 5.0. Sediment Transport Features in HEC-RAS 5.0
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