| 华南沿海地区泥石流的类型特征及其动力机制分析 |
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| 引用本文： | 唐光良,孙宁,刘瑞华. 华南沿海地区泥石流的类型特征及其动力机制分析[J]. 热带地理, 2009, 29(5) |
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| 作者姓名： | 唐光良 孙宁 刘瑞华 |
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| 作者单位： | 广州地理研究所,广州,510070;深圳市房地产估价中心环境地质研究部,深圳,518034 |
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| 基金项目： | 广州市科技计划项目广州城市建设的地质环境与灾害防治研究 |
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| 摘 要： | 通过对广东清远飞来寺、广州花都梯面、佛山南海西樵山等典型泥石流案例的分析,揭示了华南沿海地区泥石流的类型特征及其动力机制,认为泥石流的流域地貌有沟谷型和坡面型两种,流体特征以水石流和稀性泥石流居多,激发泥石流的动力主要为暴雨,属台风暴雨型;在规模上各类泥石流均为小型,但灾情严重.分析认为在华南沿海地区具有泥石流条件的区域当中,降雨量达到200 mm/d时有可能发生泥石流,降雨强度达到63～86mm/h时发生泥石流的几率极大,局部地区达到43 mm/h也有可能激发泥石流.激发泥石流与降雨强度有直接关系,日降雨量的影响为其次.
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| 关 键 词： | 华南沿海 泥石流 类型特征 动力机制 |
Analysis of Characteristics and Dynamics of Debris Flow in Coastal Areas of South China |
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| TANG Guangliang,SUN Ning,LIU Ruihua. Analysis of Characteristics and Dynamics of Debris Flow in Coastal Areas of South China[J]. Tropical Geography, 2009, 29(5) |
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| Authors: | TANG Guangliang SUN Ning LIU Ruihua |
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| Affiliation: | 1.Guangzhou Institute of Geography;Guangzhou 510070;China;2.Research Department of Geological Environment;Shenzhen Real Estate Assessment Center;Shenzhen 518034;China |
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| Abstract: | In this paper,we analyze three typical debris flows occurred at Feilai Temple in Qingyuan,at Timian in Huadouy,and at Xijiao Mountain in Nanhai.These debris flows can be classified into valley type and slope type based on their watershed geomorphology,and into water-rock flow and diluted debris flow based on fluid composition.The main predisposing factor is rainstorms,especially heavy rainstorms by typhoons.Even though these debris flows are relative small scale but cause severe disastrous impacts.We compar... |
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| Keywords: | south coast debris flow type characteristics dynamic mechanism |
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