挑流鼻坎是水利工程常用的消能工，不同体型的挑坎对过流水体具有不同的导向作用。为解决玛尔挡水电站因水头高、流速大、泄洪建筑物集中，但其对下游河床的冲刷要求高而导致泄洪消能严峻的问题，对其进行了整体模型试验。为满足溢洪道三孔鼻坎水舌在死水位时不冲砸本岸及左右岸坡脚冲刷深度较浅的设计要求，进行了斜鼻坎、舌形挑坎、直墙窄缝挑坎和曲面贴角窄缝挑坎四种不同挑坎体型的对比试验，通过比选，曲面贴角窄缝挑坎较好地满足了设计要求。该试验研究对类似工程具有一定的借鉴意义。

Flip buckets are commonly used energy dissipators in hydraulic engineering, different kinds of flip buckets play different guiding roles on flow water. Maerdang hydropower station faces difficult problems of flood discharge and energy dissipation for its high water head, huge flow velocity, centralized setting of the flood discharge structure, and it required high for scouring of the lower river bed, overall model test was made to solve the problems. In order to meet the design requirements that three holes nappe of spillway could cross-shore in the dead storage level and the downstream of river scouring should be shallower，contrast tests of oblique flip bucket, tongue-type flip bucket, straight wall slit-type flip bucket, and curved slit-type flip bucket, curved slit-type flip bucket properly were carried out, through the comparison, the curved slit-type flip bucket was satisfied the design requirements. The experimental study has some reference significance to similar projects.