Effects of Foundation Invert Elevation on the Energy Loss in the Submerged Hydraulic Jump over an Inflated Dam

Installation of inflatable dams where previously small concrete dams used to be constructed is among the environmental solutions adhered to in recent years. An inflatable dam is a thick synthetic tube، which is usually installed across a river، and confronts the flow by being filled or emptied with air or water، to an arbitrary height. Inflatable dams may contain a deflector or lack it. As the foundation invert elevation affects the dam’s performance، it may be placed at different elevations relative to the streambed. A stilling basin is formed when the invert is lower than the streambed; otherwise، the invert basin، maybe flush with the streambed. Hydraulic parameters such as the flow rate، the depth of water on the upstream and the downstream of a dam، and the depth before and after hydraulic jump were measured and the flow energy loss over the dam was computed. A decreasing trend in the relative energy loss with an increase in the drop number was observed.