Decline of groundwater table in Beijing and recognition of seismic precursory information
Mingbo Yang1, 2, 3, Yuehu Kang1, Qing Zhang4
1 Institute of Geographic Sciences and Natural Resource Research, Chinese Academy of Sciences, Beijing 100101, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3 Earthquake Administration of Beijing Municipality, Beijing 100080, China 4 Beijing Beifang Middle School, Beijing 100022, China
Decline of groundwater table in Beijing and recognition of seismic precursory information
Mingbo Yang1, 2, 3, Yuehu Kang1, Qing Zhang4
1 Institute of Geographic Sciences and Natural Resource Research, Chinese Academy of Sciences, Beijing 100101, China 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China 3 Earthquake Administration of Beijing Municipality, Beijing 100080, China 4 Beijing Beifang Middle School, Beijing 100022, China
摘要This paper quantitatively analyzed groundwater table fluctuations caused by groundwater overdraft, and probed into the possibility of drawing earthquake precursory information from groundwater table variations on the background of groundwater overdraft. Main effect factors of groundwater regime in Beijing region include groundwater extraction and rainfall. The decline of groundwater table was directly related to regional groundwater overdraft. Using the method of correlation analysis, the paper analyzed the relation between groundwater overdraft and groundwater level variations, with the aim of evaluating the effect of groundwater overdraft on water levels in observation wells and providing scientific basis for identifying seismic precursory information. The results indicate that the variations of groundwater level in slightly-affected zones of groundwater overdraft can contain some seismic precursory information, and it is possible to extract seismic precursory anomalies if proper mathematical methods are adopted to remove the trend component and annual period changes.
Abstract：This paper quantitatively analyzed groundwater table fluctuations caused by groundwater overdraft, and probed into the possibility of drawing earthquake precursory information from groundwater table variations on the background of groundwater overdraft. Main effect factors of groundwater regime in Beijing region include groundwater extraction and rainfall. The decline of groundwater table was directly related to regional groundwater overdraft. Using the method of correlation analysis, the paper analyzed the relation between groundwater overdraft and groundwater level variations, with the aim of evaluating the effect of groundwater overdraft on water levels in observation wells and providing scientific basis for identifying seismic precursory information. The results indicate that the variations of groundwater level in slightly-affected zones of groundwater overdraft can contain some seismic precursory information, and it is possible to extract seismic precursory anomalies if proper mathematical methods are adopted to remove the trend component and annual period changes.
