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2013年甘肃岷县-漳县MS6.6级地震地质灾害展布特征及主控因素研究

DOI: 10.11928/j.issn.1001-7410.2015.01.08, PP. 88-99

Keywords: 岷县-漳县地震,地质灾害,滑坡,主控因素

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Abstract:

地震地质灾害发育特征及主控因素分析是科技防灾减灾领域研究的重要内容。笔者在2013年甘肃岷县-漳县地震区现场调查的基础上,分析了地震诱发崩塌滑坡泥石流等地质灾害的类型、空间分布和典型灾害体特征,研究了本次地震的发震构造与灾害点的关系。取得了以下主要认识:1)岷县-漳县地震诱发的地质灾害类型主要为小型、中型的黄土崩塌和滑坡,地质灾害总体表现为数量多、分布广,与发震断裂和水系关系密切,滑坡灾害危害严重;2)地质灾害分布密集区与地震烈度的极震区基本吻合,且地形坡度为10°~30°的范围内与地貌高程2000~3000m的范围内地质灾害分布最为密集,它们的灾害数量分别占震区地质灾害总数的70.1%和84.4%;3)震区崩塌滑坡泥石流灾害的总体展布特征受控于NW向的韩家山-梅川镇断裂,其是NWW临潭-宕昌断裂的分支断裂。

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