Abstract:
In this paper, the characteristics of tidal parameters of Wuji well before and after the 2009~2019 earthquake are analyzed. The results show that: the variation characteristics of tidal parameters in Wujiji 20 well can be divided into four stages: (1) From 2009 to 2010, the phase values of M
2 wave and O
1 wave changed many times, and the value of the two waves was uncertain. It was concluded that the water flow in this period was mainly vertical and affected by fractures. (2) The energy density of Honshu earthquake in Japan was 4.21×10
−2 J/m
−3, and the water flow direction changed after the earthquake, indicating that the permeability coefficient of aquifer was changed and the pore pressure was redistributed. (3) The energy density of Nepal earthquake was 1.399×10
−3 J/m
−3. After the earthquake, the water flow direction changed from radial direction to vertical direction. Water exchange occurred between aquifers and aquifers, and aquifer drained into aquifers under compressive stress. (4) In the second half of 2018, the well water level is mainly affected by radial drainage, supplemented by vertical drainage under the condition of E '/ E < 1, and the main flow direction is radial. Finally, according to different research methods and models, the results are in line with expectations.