Live Bed and Clear Water Scour Override Option

Program uses the critical shear stress and the boundary shear stress to determine the scour type, whether it is live bed scour or clear bed scour. When the boundary shear stress at the approach section exceeds the critical shear stress at the same section, then the scour is live bed scour. Otherwise it is clear water scour. User can override this scour type by choosing this option. The Office of Structures recommends that the determination of type of scour -clear- water or live-bed - be determined during the development of the geomorphology report (See Chapter 14, Appendix B)