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Coseismic responses of groundwater levels in the Three Gorges well-network to the Wenchuan MS8.0 earthquake |
Chenglong Liu1, 2, Guangcai Wang2, Weihua Zhang3, Jiangchang Mei3 |
1 Institute of Geology, China Earthquake Administration, Beijing 100029, China
2 School of Water Resources and Environment, China University of Geosciences, Beijing 100083, China
3 Institute of Seismology, China Earthquake Administration, Wuhan 430071, China
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Abstract We systematically analyze coseismic responses and post-seismic characteristics of groundwater levels in the Three Gorges well-network to the MS8.0 Wenchuan earthquake on 12 May 2008. The results indicate that these characteristics differ among wells. On the conditions of similar borehole configurations, the differences are associated with geological structural sites of wells, burial types of aquifers monitored, and transmissivities of aquifer systems. We explored coseismic and post-seismic step-rise and step-drop mechanical mechanisms and their implication to earthquake prediction. We validated the inference that the residual step-rise zone is a possible earthquake risk zone based on recent seismic activity on the Xiannüshan fault in the area.
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Received: 09 January 2009
Published: 10 April 2009
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Fund:Basic Science Research Special Item of the Institute of Geology, China Earthquake Administration (No. DF-IGCEA-0608-2-10) and Special Research Program of China Earthquake Administration (No. 200808079) |
Corresponding Authors:
Guangcai Wang
E-mail: wanggc@pku.edu.cn
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[1] |
Yu Wang, Shengli Ma, Toshihiko Shimamoto, Lu Yao, Jianye Chen, Xiaosong Yang, Honglin He, Jiaxiang Dang, Linfeng Hou, Tetsuhiro Togo. Internal structures and high-velocity frictional properties of Longmenshan fault zone at Shenxigou activated during the 2008 Wenchuan earthquake[J]. Earthquake Science, 2014, 27(5): 499-528. |
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