| 基于分形维的龙门山断裂对震后次生山地灾害
控制的定量研究—以北川县为例* |
| 投稿时间：2008-11-02 修订日期：2009-04-15 点此下载全文 |
| 引用本文：阿发友.基于分形维的龙门山断裂对震后次生山地灾害
控制的定量研究—以北川县为例*[J].地质与勘探,2009,45(3):312-320 |
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| 基金项目:*国家自然科学基金(批准号:50639070)、中国科学院地震次生山地灾害科学考察项目资助。 |
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| 中文摘要:[摘要]利用几何分形学的方法,测算了北川县及邻区区域内龙门山断裂的总体分形维和各分带
的分形维,再分别对研究区灾害点分布进行总体分形维和各分带分形维测算。通过分析分形维测算结
果以及灾害点分布密度,结果表明,断裂带各分带的分形维差异很好的体现了龙门山断裂的构造变形特
征,并与各分带的灾害点分布密度呈正相关关系;灾害分布分形维是灾害点分布均匀程度的体现,与断
层分布的复杂程度和灾害点分布密度无关。定量的证明了断层分形维、灾害分布分形维和灾害分布密
度三者的关系,成功的以定量的形式分析了龙门山断裂对震后次生山地灾害分布的控制。 |
| 中文关键词:次生山地灾害 龙门山断裂 分形维 北川 |
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| Quantitative Research the Earthquake-induced Geohazard Controlled by LongmenshanFaults after Earthquake Based on the Fractal-Examplified by Beichuan County* |
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| Abstract:Abstract: The fractal dimension of Longmenshan fault around the Beichuan county and the hazards鄄point of different zone of Longmenshan fault is cal鄄
culated by using fractal. The results showed that the fractal dimension of the different zone of Longmenshan fault well reflect the tectonized charactics of the
faults, and it is positively correlated with the secondary hazards鄄point distribution density of different zone of Longmenshan fault; the fractal dimension of
the secondary hazards鄄point distribution is not fully consistent with the fractal dimension of the faults and the hazards鄄point distribution density. All this
quantitatively proof the relate among the fractal dimension of fault , the fractal dimension of the secondary hazards鄄point distribution and the hazards鄄point
distribution density ,and the distribution of hazards鄄point after earthquake controlled by Longmenshan faults is successfully confirmed by quantitatively
way. |
| keywords:secondary hazards,Longmenshan faults, fractal dimension,Beichuan |
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