Estimation of free flow discharge under the sluice gate using simplified relations baed on energy, momentum and continuity equations

Tohid Samiadel ¹ ( Civil engineering department, Najafabad branch, Islamic Azad University, Najafabad, Iran )
Mohammad karim Beirami ² ( Civil engineering department, Isfahan University of Technology, Isfahan, Iran )

Submited date : 2019-02-13 Accepted date : 2021-09-01

Keywords: discharge, sluice gate, energy equation, momentum equation, continuity equation,

Abstract :

Sluice gates are useful hydraulic structures which are used in the irrigation and laboratory flumes to measure and control the discharge and regulate the water level. Despite the wide use of these gates and numerous studies on them, there is still no accurate method for estimating the discharge through the gate, which is unanimous between all of the researchers. In this paper, considering the experimental data of other investigators and also the data obtained in this study and using the energy, momentum and continuity equations with simplifying assumptions, three different Dimensionless methods Based on parameters which are easily measurable have been proposed to estimate the discharge under the sluice gate. The proposed relations have been confirmed using the experimental data from other researchers and the calculated errors are within the acceptable range. As a result, the energy equation with a mean error of 2% and maximum error of 7% is proposed.