[This article belongs to Volume - 54, Issue - 05]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-21-07-2022-247

Title : A Comparison of Energy Dissipation on Gabion and Impervious Stepped Weirs
Samir Saify,

Abstract : Energy dissipation on weirs and spillways are one of significant issues due to the high kinetic energy of downstream flow which might cause damage to hydraulic structures as well as downstream channels. So, to enhance energy dissipation, weirs of stepped type can be used. Recently, stepped weirs are more interesting because they work well with the positioning of gabions and roller-compacted concrete (RCC) construction. In this investigation and comparison of energy dissipation on impervious stepped weirs and gabion is presented. Three lab-scale models of impervious stepped weirs and three models of gabion stepped weirs, each with three downstream slopes, were explored for this purpose (1:1, 1:2 & 1:3, V:H). Results indicates gabion weirs dissipate energy more than impervious weirs by about 15% in the lowest discharge and 7% at the highest discharge. Additionally, for gabion and impervious stepped weirs, results indicate that, energy dissipation increased when slope of the downstream direction decreased. Lastly, for gabion and impervious stepped weirs, the rate of energy dissipation falls as flow rate increases.