Estimation of Maximum Scour Depth and Scour Pattern Around Submerged Spur-Dike

Scouring due to turbulent flows is a process that naturally happens around river structures, including river training or riverbank protection works such as spur dikes, submerged vanes, etc. present experimental study aims to estimate the maximum scour depth around submerged spur dikes, which have not been studied as extensively. In this study, we checked the influence of different flow conditions, spur dike dimensions and submergence conations on maximum scour depth at equilibrium scour conditions. The dependence of the criteria for scour initiation and scour patterns on the dike dimensions, such as the dike length and height, has been assessed. We also checked the previously proposed equations for maximum scour depth at submerged spur dike using present and previous (collected from literature) experimental data. The dependency of maximum scour depth on some hydraulic and geometric control parameters is also discussed. In addition, a new equation is also proposed to calculate the maximum scour depth around submerged spur dike at equilibrium condition, which shows better agreements with present and previous experimental datasets than other equations.