关键词: 堰塞湖, 信息获取, 溃坝洪水预测, 风险评估, 洪水演进, 金沙江

Abstract: Accurate and timely information acquisition is a prerequisite for carrying out catastrophic process forecast, outburst flood calculation, risk assessment and emergency response for a sudden occurred barrier lake, and the outburst flood forecast is the key technical support for risk assessment and emergency response. Based on the treatment work of the four barrier lakes events occurred at Baige in the Jinsha river and Milin in the Yarlung Zangbo Rivers during October to November in 2018, we analyze the current situation and existing problems of the treatment and emergency response of the barrier lake in China, including information acquisition, methodologies of flood forecasting and risk assessment under the impact of hydraulic engineering projects on the river. Using the two barrier lakes occurred at Baige in the Jinsha River as the cases, technologies and methodologies on information acquisition, flood forecast, impact analysis on hydraulic works, and risk assessment are presented. According to the applied effects, we put forward some study fields that need to be strengthened in the future. Such methodology and technologies can be of good reference value for emergency treatment of barrier lake in the future.

Key words: barrier lake, information acquisition, dam break flood forecasting, flood routing, Jinsha River