世界上最大的多级孔板泄洪洞日前由小浪底水利枢纽1号导流洞改建而成,一旦出现超标准洪水,即可投入使用。至此,小浪底工程已有多项技术难题被攻克,工程1999年安全度汛和首台机组年底发电有了进一步的把握。因小浪底工程多项开发目标的要求,坝址左岸山体设置了多达108个洞室,为 The world’s largest multi-stage orifice spillway has recently been converted from the Xiaolangdi Multipurpose Dam No. 1 diversion tunnel. Once an out-standard flood has emerged, it can be put into operation. At this point, Xiaolangdi project has been a number of technical problems have been overcome, the project safety flood season in 1999 and the first unit has been further grasp of power generation. Due to the requirements of a number of development goals of Xiaolangdi Project, as many as 108 caverns were set up on the left bank of the dam site as