SCOUR IN STONE BEDS

Abstract

Energy dissipation in vertical drop structures is usually contained within concrete stilling basins. When suitable stone is available locally a satisfactory structure may be obtained at a lower cost by utilizing a stone bed to contain the zone of energy dissipation. Scour in stone beds downstream from vertical drop structures was investigated. Dimensionless charts are presented for the determination of scour hole dimensions. Criteria for dependable designs of stone beds are proposed.