Earthquake recovery. Slew of landslides unmask hidden geological hazards.
Earthquake recovery. Slew of landslides unmask hidden geological hazards.
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DOI：
10.1126/science.330.6005.744
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发表时间：
2010-11
期刊：
影响因子：
56.9
通讯作者：
H. Xin
中科院分区：
文献类型：
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作者：
H. Xin
地震恢复 8月7日午夜前，中国西部甘肃省舟曲市北部山区的暴雨给这座沉睡的小镇带来了泥浆、巨石和瓦砾的洪流。与山区的许多聚居地一样，舟曲建在早期泥石流形成的冲积扇上。 8 月份的灾难是自 1823 年以来第 12 起造成破坏的事件。研究人员估计，城镇北部的两个沟壑中堆积了约 2500 万立方米的松散岩石和沉积物。采石等人类活动造成了这些不稳定的物质，但研究人员认为，其中大部分是 1879 年大地震后山体滑坡和落石沉积下来的。研究结果表明，泥石流可能在大地震发生 100 多年后才发生。
Earthquake RecoveryJust before midnight on 7 August, heavy rains in the mountains north of Zhouqu, in western China's Gansu Province, unleashed a torrent of mud, boulders, and rubble on the slumbering town. Like many settlements in mountainous regions, Zhouqu is built on an alluvial fan from earlier debris flows. The August disaster was the 12th damage-causing event since 1823. Researchers estimated that some 25 million cubic meters of loose rock and sediment had accumulated in two gullies north of town. Human activities like quarrying contributed to the precarious mass, but most of it, researchers believe, was deposited by landslides and rockfalls after a big earthquake in 1879. The findings suggested that debris flows could strike more than 100 years after a major quake.