| 西藏波密易贡高速巨型滑坡特征及减灾研究 |
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| 引用本文： | 殷跃平.西藏波密易贡高速巨型滑坡特征及减灾研究[J].水文地质工程地质,2000,27(4):8-11. |
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| 作者姓名： | 殷跃平 |
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| 作者单位： | 国土资源部全国地质环境监测总站，北京 100081 |
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| 摘 要： | 2000年4月9日晚，西藏林芝地区波密县易贡藏布河发生巨型高速滑坡。滑坡经历了高位滑动-碎屑流-土石水气浪-泥石流-次级滑坡等过程，具复合性。滑坡由5520m高程的雪山向下高速滑动，历时约10min，滑程8km，堆积于约2190m高程的易贡藏布江，形成坝高54m，长约2500m，库容可达288×108m3，体积约2.8×108～3.0×108m3的滑坡堰塞湖。为了减轻水位上涨对湖区4000多人员的淹没危害和防止滑坡“溃坝”对下游318国道及雅鲁藏布江大峡谷地区的危害，采用了在坝体开渠引流降低溃坝高程和湖水库容的减灾措施。
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| 关 键 词： | 地质灾害 滑坡 堰塞湖 大峡谷 |
| 文章编号： | 1000-3665(2000)04-00 08-04 |
Rapid huge landslide and hazard reduction of Yigong River in the Bomi,Tibet |
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| Abstract: | The rapid huge landslide occurred in Yigong River in the Bomi, Tibet, on the April 9,2000. The landslide processing is divided into four stages : a)high place sliding and fall at the elevation 5500m; b)avalache; c)mix flow a nd wave with mud, rock, snow water, air; c)mudflow, secondary landslide, lasted 10 minutes. A “landslide dam” is formed suddenly with 2500m long, 2500m wid e, 60m high, 280～300 million m3 in volume and a landslide-blocked lake is bo rn holy. To reduce drown hazard in the lake area and flooding disaster in the lo wer reaches, a measurement of excavate trench is applied. |
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| Keywords: | geologic hazard landslide landslide-blocked lake great gorge |
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