目前在国内外一些大洪水河流上水电站的溢洪道采用消力戽消能的实例很多,主要原因是为了节省工程量和缩短建设工期,当然其前提是必须保证电站的安全运行。一般来讲,消力戽的消能作用不如消力池充分,其剩除的水流能量将在下游河道中造成比较严重的冲刷以及产生不利于电站运行的尾水波动和回流等。如果下游河道比较顺直,冲刷区的地质条件较好,下游又没有重要的城镇、堤防、铁路、桥梁以及工业取水口等重要工程设施时,消能型式一般都倾向于采用消力戽。但是在实际工程中,理想的河道地形地质条 At present, there are many examples of dissipating energy dissipated in the spillways of some large floodwaters at home and abroad. The main reason is to save the project volume and shorten the construction period, of course, the premise is that the safe operation of the power plant must be guaranteed. In general, the dissipative effect of the dissipative force is not as good as that of the weak force pool, and the water energy remaining in it will cause more serious erosion in the lower reaches of the river and generate tail water fluctuations and backflows that are not conducive to the operation of the power station. Energy dissipation patterns generally tend to be dissipated if the lower reaches are relatively straight, the geology of the scouring zone is good, and there are no important towns, embankments, railways, bridges, industrial water intakes and other important engineering facilities downstream. However, in practical projects, the ideal terrain geological topography