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基于点模式的地震重灾区滑坡空间分布特征研究

DOI: 10.13577/j.jnd.2015.0206, PP. 40-51

Keywords: 点模式,汶川地震,滑坡,空间分布特征

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Abstract:

受自然环境因子(如地形地貌、地层岩性、地质构造等)和诱发因素(如降雨、地震等)的影响,滑坡在空间上的分布特征极其复杂,但其空间分布仍具有内在的规律.本文以"汶川地震"极端事件为时间分段点,采用基于样方的点模式分析法对汶川地震重灾区滑坡的空间分布特征进行了分析,得出滑坡点群在震前和震后均呈空间聚集模式分布.这说明由于受各环境因子及其因子组合作用,汶川地震重灾区滑坡的发生无论在震前还是震后并非随机事件,其滑坡点的空间分布具有统计意义上的自相似结构,且无特征尺度.

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