Many hydraulic structures are constructed in an open channel according to the purposes and the nature of the region. Weir is one of these structures which is used for discharge measurements as well as rising water depth in irrigation channels. According to the crest, there are two different shapes: sharp and broad crested weir. A stepped weir is constructed to reduce scour that happened downstream. There are different studies dealt with discharge coefficient, energy dissipation, and other hydraulic characteristics for flow over the weir. In this study, the coefficient of discharge for the Al-Shalalat stepped weir on the Al-Khusr River has been evaluated. The discharge coefficient equation is predicted, and the result values are compared with previous studies. The percentage error for the predicted discharge equation presented in this study compared with previous studies does not exceed 10%.

根据该区域的目的和性质，许多水力建筑都建在明渠中。堰是这些结构之一，可用于流量测量以及灌溉渠道中水位上升。根据波峰，有两种不同的形状：尖峰和宽波峰堰。构造了阶梯式堰，以减少下游发生的冲刷。对于溢流堰上的流量，排水系数和其他水力特性，有不同的研究。在这项研究中，对Al-Khusr河上的Al-Shalalat阶梯堰的流量系数进行了评估。预测了排放系数方程，并将结果值与以前的研究进行了比较。