Arced labyrinth weir is a certain type of nonlinear weirs with a very high discharge capacity. Thanks to the increased effective length and the ensuing increased discharge capacity of these weirs, they can be used in dam spillways and water regulating structures. This study focused on trapezoidal Arced labyrinth weirs (TALW) of widened middle cycle. Various experiments were performed to evaluate the effect on discharge coefficient of various geometric parameters, including the ratio of inside apex width of the end cycles to that of the middle cycle (w₂/w₁) and the ratio of the length of labyrinth weir (Apron) in flow direction to the width of the middle cycle (B/w₁). Results of this study showed that with a decrease in w₂/w₁ from 0.42 to 0.30, discharge coefficient (C_d) would increase by 13–33%.

弧形迷宫堰是一种具有很高放电容量的非线性堰。由于这些堰的有效长度增加和随之而来的增加的排泄能力，它们可用于大坝溢洪道和水调节结构。这项研究的重点是扩大中间周期的梯形弧形迷宫堰（TALW）。进行了各种实验以评估各种几何参数对排放系数的影响，包括末端循环的内顶点宽度与中间循环的内顶点宽度的比率（w ₂ / w ₁）和迷宫堰的长度比率（沿流动方向到达中间循环宽度（B / w ₁）的围裙）。这项研究的结果表明，随着w的减小，₂ / w ₁从0.42到0.30，放电系数（ C _d）将增加13-33％。