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

Subject Areas : Subjects

H. زارع ¹ (دانشجوی دکتری مهندسی عمران- مهندسی رودخانه، دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز)
GH. سروی شوریجه ² (کارشناس مهندسی عمران- عمران، دانشگاه آزاد اسلامی، واحد زرقان، باشگاه پژوهشگران جوان و نخبگان، زرقان، ایران)
M. بینا ³ (دانشیار دانشکده مهندسی علوم آب، دانشگاه شهید چمران اهواز)

Received: 2014-03-01 Accepted : 2014-03-01 Published : 2013-11-22

Keywords: energy dissipation, deflector, Inflatable Dam, foundation invert elevation, cushion,

Abstract :

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.

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