The discharge range of the water - wing decreases and the height of the water - wing increases with augmentation of the bottom slope of stepped spillways ; but the discharge range and height of the water - wing decrease with decrease of step size ; the intensity pressure on the steps increases remarkably at the falling point of the water - wing 随着溢洪道底坡的增大，水翅流量变化范围变小、高度增加；但是随着台阶尺寸的减小，流量变化范围缩小、高度降低；水翅的落点处，台阶面上压强明显增大。
