| 汶川地震对现代河流形态的影响与水文效应 |
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| 引用本文： | 许领,戴福初,涂新斌,王明明.汶川地震对现代河流形态的影响与水文效应[J].高校地质学报,2009,15(3). |
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| 作者姓名： | 许领 戴福初 涂新斌 王明明 |
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| 作者单位： | 1. 中国科学院地质与地球物理研究所,北京,100029
2. 中国地震局地质研究所,北京,100029 |
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| 摘 要： | 2008年5月12日14时28分,我国四川发生里氏8.0级大地震,发震构造为龙门山断裂带.形成了NE向映秀-北川断裂地表破裂带,彭县-灌县断裂破裂带以及NW向的小鱼洞破裂带,表现为逆冲-走滑性质.目前,有关地表破裂、次生地质灾害及堰塞湖等开展了大量的调查工作,而地震对河流形态的影响还缺少较为系统的分析.在野外地震地貌考察的基础上,根据河流走向与断层位置关系,并结合地表破裂特征,总结了汶川地震对现代河流形态影响的几种地貌类型:顺向陡坎跌水,河道错动,断寨湖(塘),河流改道等,并对其演化趋势进行了讨论.分析了汶川地震的河流水文效应:地震增加了河流泥沙含量,改变了河流水质,同时,也使得河流与地下水系统之间的联系更为紧密.
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| 关 键 词： | 汶川地震 河流跌水 河道错动 断塞湖(塘) 河流改道 水文效应 |
Morphological and Hydrological Effects of Wenchuan Earthquake on Modern Rivers |
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| XU Ling,DAI Fu-chu,TO Xin-bin,WANG Ming-ming.Morphological and Hydrological Effects of Wenchuan Earthquake on Modern Rivers[J].Geological Journal of China Universities,2009,15(3). |
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| Authors: | XU Ling DAI Fu-chu TO Xin-bin WANG Ming-ming |
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| Institution: | 1.Institute of Geology and Geophysics;Chinese Academy of Sciences;Beijing 100029;China;2 .Institute of Geology;China Seismological Administration;China |
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| Abstract: | The Ms 8.0 Wenchuan earthquake strongly shocked at 14:28 on May 12,2008.The seismogenic structure belongs to the Longmenshan fault zone.Its surface rupture belts include those formed along the NE striking Yingxiu-Beichuan and Pengxian-Guanxian faults and the NW striking Xiaoyudong fault.The surface ruptures are characterized by thrust faulting with strike-slip movement.The surface ruptures,landslides,fall and dammed lakes were surveyed with great efforts after the Wenchuan earthquake.However,the morphologic... |
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| Keywords: | Wenchuan earthquake river waterfall river slipping earthquake fault lake/poodle riverway changing hydrological effects |
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