Relation of deformation behavior with precipitation and groundwater of the Babaoshan fault in Beijing  

作　　者：黄辅琼 陈颙 白长清 张晶 晏锐 杨明波 兰丛欣 张晓东 江在森 

机构地区：[1]Institute of Geophysics, China Earthquake Administration, Beijing 100081, China,China Earthquake Network Center, China Earthquake Administration, Beijing 100036, China [2]China Earthquake Administration, Beijing 100036, China [3]Fengtai Observatory Station, Earthquake Administration of Beijing Municipality, Beijing 100080, China [4]Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China [5]China Earthquake Network Center, China Earthquake Administration, Beijing 100036, China [6]Earthquake Administration of Beijing Municipality, Beijing 100080, China

出　　处：《Acta Seismologica Sinica(English Edition)》2005年第6期686-696,749,共12页

基　　金：National Natural Science Foundation of China (40374019);Joint Earthquake Science Foundation of China (1040106).

摘　　要：We discuss the influence of precipitation and groundwater on the deformation behavior of the Babaoshan fault of Beijing by using long-term observation data from Dahuichang station during 1970-2003. The results show that a) the pore pressure on fault zone as well as the fault deformation behavior exhibited periodically variation as precipitation changed steadily and periodically; b) the periodicity of the pore pressure of fault zones disappeared and the manner of fault deformation behavior changed when precipitation was small and/or was in aberrance. This implies that rainfall plays a key role in fault deformation behavior through changing the pore pressure of fault zones. Combining the existing results about the Babaoshan fault, it is concluded that precipitation and groundwater may adjust the stress/strain field by controlling the deformation behavior of the fault, which can provide direct observation evidence for the interaction of fluid and solid in shallow crust of the Earth.We discuss the influence of precipitation and groundwater on the deformation behavior of the Babaoshan fault of Beijing by using long-term observation data from Dahuichang station during 1970-2003. The results show that a) the pore pressure on fault zone as well as the fault deformation behavior exhibited periodically variation as precipitation changed steadily and periodically; b) the periodicity of the pore pressure of fault zones disappeared and the manner of fault deformation behavior changed when precipitation was small and/or was in aberrance. This implies that rainfall plays a key role in fault deformation behavior through changing the pore pressure of fault zones. Combining the existing results about the Babaoshan fault, it is concluded that precipitation and groundwater may adjust the stress/strain field by controlling the deformation behavior of the fault, which can provide direct observation evidence for the interaction of fluid and solid in shallow crust of the Earth.

关 键 词：Babaoshan fault PRECIPITATION GROUNDWATER fault deformation behavior 

分 类 号：P315.723[天文地球—地震学]