Abstract: Concentrated flood discharge and desilting by spillway tunnel plays an important role to prolong the life of reservoir and retain active storage capacity in long-term. Several technical problems should be dealt with in the design of spillway tunnel, such as selection of plane position, inlet elevation, structural style and the type of outlet section.

Key words: sediment-laden river, reservoir, spillway tunnel, desilting

摘要： 泄洪洞的集中泄洪排沙对延长水库寿命和维持长期使用库容起着重要作用，设计泄洪洞时应处理好平面位置、进口高程、洞型及出口挑流段体型等几个技术问题。

关键词: 多沙河流, 水库, 泄洪洞, 排沙