Abstract: The cause of the scour funnel is very complicated, and there is no strictly similar and matured method to used for scouring funnel of slope. Through comparison and analysis of three methods of empirical formula calculation, model test and prototype observation of the scour funnel induced slope in the hydropower station, the results show that the slope of empirical formula calculation generated results similar to that of the model test, and the slope of the prototype observation is gentler than slope by the empirical formula calculation and model test. The increased flushing bottom outlet flow rate, increased corresponding bottom outlet velocity , formation of the gentler scour funnel slop facilitate more clear water at inlet and normal power generation for hydroelectric station.

Key words: hydropower engineering, slope of scouring funnel, theoretical calculation, model test, prototype observation

摘要： 冲刷漏斗的成因十分复杂，目前试验技术尚无严格相似，冲刷漏斗的坡度尚无成熟方法可依。通过水电站冲刷漏斗的坡度经验公式计算、模型试验和原型观测3种方法对比分析，结果表明：经验公式计算得到漏斗坡的坡度与模型试验值基本接近，原型观测冲刷漏斗的坡度普遍比经验公式计算和模型试验值偏缓。冲沙底孔流量增大，相应底孔流速增大，形成的冲刷漏斗坡度更平缓，对水电站进水口门前清和正常发电更为有利。

关键词: 水电工程, 冲刷漏斗的坡度, 经验公式计算, 模型试验, 原型观测