Structure-Induced Sediment Scour Local Scour Bounds and Assessment of GlobalScour

摘要

When coastal structures are inundated by storm waters they often experiencesediment scour around their foundations. An understanding of these processes to the extent of being able to estimate the depth and volume of sediment lost during an extreme storm event is of utmost importance. The report describes live bed structure-induced sediment scour experiments conducted to help establish upper bounds on scour depths with regard to depth mean velocity. The structure examined was a 4 inch diameter vertical cylinder and the D50 for the sediment was 0.75 mm. Limited experiments were also conducted on other shapes including multiple vertical pile structures.