水布垭工程电站尾水紧临消能区的下游,泄洪期尾水出口的波浪较大,尾水口门区在小流量泄洪条件下,落淤较为严重。经1/100水工模型试验的多方案研究,提出了溢洪道采用阶梯式窄缝挑流鼻坎的泄洪消能型式。由于该体型较好地适应了消能区河弯地形且顺应河势以及有效地利用了空中消能和河道拐弯处的水体消能,收到了冲刷高程抬高、波浪降低的良好效果，为此，该体型已被设计所采用。

The exits of tailrace of Shuibuya Hydropower Plant are located very clolse to the downstream energy-dissipater. The surge wave near the exits of the tailrace is fairly large during the flood-releasing period, and the deposition at the same region is rather serious under small discharge cases. Through comparing and optimizing the test results of different arrangement schemes at a 1∶100 scale hydraulie model, a recommended energy dissipator with stepped narrow-slot ski-jump buckets is worked out, which can solve all abovementioned problems, and thus has been accepted by the desigh. This scheme achieves better effect in the aspects of raising of the elevation of scour pit and reducing the wave height because itconforms fairly well to local geography and river regime downstream the dam and can make use of the energy dissipation of water jetting in air and of water body in river.