Analysis of water temperature anomaly in Yongqing well based on water chemistry

It is a primary task to distinguish whether the groundwater is affected by shallow material recharge or deep medium activity for the research of subsurface fluid. In this paper, the data of water chemical composition and hydrogen and oxygen stable isotope were obtained by collecting and testing several samples from Yongqing well and its surrounding areas. Through the comparison of groundwater sample data, water chemical composition, stable isotopes of hydrogen and oxygen and precipitation line, water temperature and water level data analysis, it is concluded that the repeated abnormal changes of water temperature in Yongqing well are not interference effects. According to the corresponding relationship between the abnormal change of water temperature and earthquake, it is founded that the abnormal water temperature in Yongqing well may be related to three earthquakes.