| 金沙江白格滑坡及堰塞湖洪水灾害分析? |
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| 引用本文： | 郭小农,陈晨,朱劭骏,成张佳宁.金沙江白格滑坡及堰塞湖洪水灾害分析?[J].防灾减灾工程学报,2020(2):286-292. |
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| 作者姓名： | 郭小农 陈晨 朱劭骏 成张佳宁 |
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| 作者单位： | 四川大学水利水电学院，四川 成都 610065;中国地质调查局成都地质调查中心，四川 成都 610081 |
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| 基金项目： | 国家重点研发计划项目（2018YFC1505004）资助 |
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| 摘 要： | 2018年10月10日和11月3日，西藏自治区江达县波罗乡白格村金沙江右岸同一位置先后两次发生滑坡堵江灾害，滑坡体方量分别约为1 000×104 m3和283×104 m3，其中第一次滑坡为高位、高剪出口、高速滑坡，第二次滑坡则为第一次滑坡牵引区进一步发展的结果。在堵塞金沙江近2 d及9 d后，滑坡堰塞湖蓄水量达到峰值分别为2.9×108 m3和5.24×108 m3，并分别在自然泄流和人工开挖泄流槽两种方式下开始从堰塞体右岸垭口处过流，其中第二次滑坡堰塞湖溃决洪水造成西藏、四川和云南3省（自治区）多处房屋、道路、桥梁和耕地受损，无人员伤亡。基于两次滑坡及溃决洪水受灾区现场勘测调查，并结合相关资料，对比分析了两次滑坡堰塞湖的处置及溃决洪水灾害情况，启示如下：越早进行人工干预，灾害越轻；为更好地应对今后可能出现的滑坡堰塞湖溃决洪水，水电站应提高设计标准并充分发挥其收蓄洪水的能力。
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| 关 键 词： | 金沙江 白格滑坡 堰塞湖 洪水灾害 |
Analysis on Baige Landslide and Barrier Lake Flood Disasters in Jinsha River |
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| GUO Xiaonong,CHEN Chen,ZHU Shaojun,CHENG Zhangjianing.Analysis on Baige Landslide and Barrier Lake Flood Disasters in Jinsha River[J].Journal of Disaster Prevent and Mitigation Eng,2020(2):286-292. |
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| Authors: | GUO Xiaonong CHEN Chen ZHU Shaojun CHENG Zhangjianing |
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| Affiliation: | College of Water Resource and Hydropower, Sichuan University, Chengdu 610065 , China; Chengdu Geological Survey Center, China Geological Survey,Chengdu 610081 , China |
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| Abstract: | On October 10 and November 3,2018, landslides occurred twice in the same position on the right bank of the Jinsha River in Baige Village, Boluo Township, Jiangda County, Tibet Autonomous Region. The volumes of the two landslides are about 1 000×104 m3 and 283×104 m3, respectively. The first landslide possesses high initial position, high shear outlet, and high speed. The second one is the further development of the traction zone of the first landslide. After blocking Jinsha River for nearly 2 days and 9 days, the water storage capacity of landslide barrier lake reached its peak values of 2.9×108 m3 and 5.24×108 m3, respectively, and began to flow through the right bank of the barrier dam through natural discharge and artificial excavated channel. The outburst flood of the second dammed lake caused much damage to houses, roads, bridges and cultivated land in Sichuan, Yunnan provinces and Tibet autonomous region, with no casualties. Based on field investigation on the two landslides and the flood-affected areas, the disposal of the two landslide dammed lakes and the outburst flood disasters were compared and analyzed based on relevant collected data. The revelations are as follows: the earlier the manual intervention, the lighter the disaster; In order to better deal with the possible outburst flood caused by landslide dammed lake in the future, the hydropower station should improve the design standard and enhance its capacity for flood collecting and storing. |
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