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
Coseismic responses of groundwater levels in the Three Gorges well-network to the Wenchuan MS8.0 earthquake
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
摘要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.
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.
基金资助: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)
通讯作者:
Guangcai Wang
E-mail: wanggc@pku.edu.cn
引用本文:
Chenglong Liu, Guangcai Wang, Weihua Zhang, Jiangchang Mei. Coseismic responses of groundwater levels in the Three Gorges well-network to the Wenchuan MS8.0 earthquake[J]. 《地震学报》英文版, 2009, 22(2): 143-148.
Chenglong Liu, Guangcai Wang, Weihua Zhang, Jiangchang Mei. Coseismic responses of groundwater levels in the Three Gorges well-network to the Wenchuan MS8.0 earthquake. Earthquake Science, 2009, 22(2): 143-148.
