中文摘要：

针对某水库溢洪道消力池内水流流态较差、消能效果不理想和对下游岸坡冲刷严重等问题，通过水力学模型试验，在原设计方案基础上对比分析了消力池集中消能和阶梯分级消能两种消能方式，并观测了消力池水流流态、底板压强、下游河道水面线等水力特性指标。结果表明，消力池集中消能方式更适合本工程地形特点、地质要求，消能效果明显，出池水流流态较好，与下游河道水面衔接平顺，并且水面波动较小，满足泄洪消能要求。

英文摘要：

A hydraulic experimental study is conducted based on a certain reservoir for the problem of flow regime and energy dissipation effect and the downstream slope erosion are rather bad .A comparison is made between hydraulic characteristics of stilling basin concentrated dissipation and stepped grade dissipation .And then the hydraulic characteristics of flow patterns ,pressure at the bottom are observed ,water lines of downstream are observed .The results indicate that stilling basin concentrated dissipation is more suitable for the topographic features ,meets geological requirements ,has better dissipation effects and flow patterns ,and the scour on downstream reach and back slope decreases with the smooth cohesion with the downstream water surface ,and the effect of energy dissipation is enhanced and the requirements of energy dissipation is met .