LOCAL SCOUR DOWNSTREAM OF HYDRAULIC STRUCTURES

An analysis of the problem of local scour downstream of hydraulic stru ctures is presented here. This paper briefly discusses the functional design of the bed protection downstream of large hydraulic structures. Phases of the scour process and transport mechanism are treated in an introductory manner. Subsequently, semiempirical relations for the ma ximum scour depth of clear-water scour (scour with no sediment flux fr om upstream) and the stability analysis of scour slopes upstream are d iscussed. The proposed equations are verified with prototype data.