ENERGY DISSIPATION AND DISCHARGE COEFFICIENT OVER STEPPED GABION AND BUTTRESS GABION SPILLWAY

Gabions are economic structure widely used in small head works to avoid the effect of large potential energy. The aim of this paper is to study the Energy Dissipation and Discharge Coefficient over Stepped Gabion spillway and a suggested new gabion style. This new style was suggested to enlarge the max head of gabions depending on buttress wall technology. This structure was named as Buttress Gabion spillway. The dimensional analysis was used to correlate the different parameters affecting the studied phenomena. It was found that using of large particle increases energy dissipation and coefficient of discharge. Also as the number of buttress walls increases the energy dissipation coefficient of discharge decreases.