三峡库区黑石板滑坡涌浪分析Analysis of surge induced by Heishiban Landslide inThree Gorges Reservoir Area
霍志涛,黄波林,张全,闫国强,卢书强,范意民
摘要(Abstract)：
自三峡工程建设以来,库区范围内发生多起滑坡涌浪,为了正确预防和制定涌浪减灾方案,需要预测滑坡涌浪所波及的范围、涌浪的高度、传播的速度、以及波浪爬高。为此,结合三峡库区秭归县水田坝乡黑石板滑坡实例,采用基于水波动力理论FAST模拟软件进行涌浪计算分析及预测。结果显示:175 m水位下,滑坡体滑移入江速度约5.56 m/s,最大涌浪高度为37.2 m,对岸最大爬高为36 m;涌浪主要危害区为吒溪河内,传播至长江及其他支流后涌浪高度最大不超过0.6 m;在滑坡河段2 km范围内泓深线附近涌浪从约12 m下降至3 m,该急剧衰减区是滑坡涌浪急剧作用区,对应位置为水田坝乡。研究表明,涌浪传播、衰减、浪高、爬高与水域深浅、沟谷微地形密切相关,因此根据海啸预警划分方法和涌浪计算结果,得到黑石板滑坡涌浪预警分区;尤其是通过淹没线与遥感影像叠加,得到了水田坝乡受直接威胁的建筑分布。
关键词(KeyWords)： 三峡库区;滑坡涌浪;数值模拟;灾害分析;预警分区
基金项目(Foundation): 国家重点研发计划项目(2018YFC1504803);; 三峡后续工作地质灾害防治项目(000121 2018C C60 003;2018102849);; 中国地质调查局项目(DD20190637)
作者(Author): 霍志涛,黄波林,张全,闫国强,卢书强,范意民
DOI: 10.13928/j.cnki.wrahe.2020.01.013
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