Abstract: As floods rise up and down sharply in Yarlung Zangbo River during the flood season, a hydropower station adopts three-level forecast system (short-term, medium-term and long-term) and four-level warning mechanism (blue, yellow, orange and red), which successfully helped the resistance of the 2018·08 catastrophic flood. It can serve as a reference for similar projects.

Key words: Yarlung Zangbo River, flood during construction, forecasting and warning mechanism, emergency response

摘要： 针对雅鲁藏布江汛期洪水暴涨暴落的特点，某水电站工程采用短期、中期和长期三级预报系统，蓝、黄、橙、红四级预警机制，成功抵御了“2018·08"特大洪水，相关预警方案和响应机制可供类似工程借鉴参考。

关键词: 雅鲁藏布江, 施工期洪水, 预报预警机制, 应急响应