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[1]WEI Haibin,GU Hongbiao,KONG Huimin,et al.Modeling the Coseismic Response Process of the Water Level to the 2014 Ludian MS6.5 Earthquake:A Case Study of Huize Well[J].Journal of Seismological Research,2022,45(02):329-339.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0028]

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Modeling the Coseismic Response Process of the Water Level to the 2014 Ludian M_S6.5 Earthquake:A Case Study of Huize Well

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 45 Number of periods: 2022 02 Page number: 329-339 Column: Public date: 2022-05-20

Title:: Modeling the Coseismic Response Process of the Water Level to the 2014 Ludian M_S6.5 Earthquake:A Case Study of Huize Well

Author(s):: WEI Haibin¹; 2; GU Hongbiao¹; 2; KONG Huimin¹; 2; 3; CHI Baoming¹; 2; 3; (1.Institute of Disaster Prevention,Sanhe 065201,Heibei,China)(2.Heibei Key Laboratory of Earthquake Dynamics,Sanhe 065201,Heibei,China)(3.Institute of Engineering Mechanics,China Earthquake Administration,Heilongjiang 150080,Harbin,China)

Keywords:: Huize Well; the Ludian earthquake; water-level; coseismic response; numerical simulation

CLC:: P315.723

DOI:: 10.20015/j.cnki.ISSN1000-0666.2022.0028

Abstract:: In order to quantitatively characterize the coupling process of the variation of the water level in Huize Well with the variation of the crustal stress and strain,the disturbance of the pore pressure in the confined aquifer,and in order to deepen the understanding of the mechanism of the coseismic response of the near-field water level in the Well,a numerical simulation of multi-field coupling is used to obtain the coseismic static strain field,the evolution law of pore pressure,and the simulated curves of the water level in Huize Well caused by the 2014 Ludian M_S6.5 earthquake within the range of 200 km×200 km in Ludian region.Then,after the permeability coefficient(K),Young’s modulus(E)and porosity(n)are set as variables,six groups of different working conditions are designed to analyze the parameters affecting the evolution of pore pressure in the study area.The results show that:①The coseismic static strain field caused by the Ludian earthquake is distributed in four quadrants along both sides of the fault,and the extreme values of the strain field are distributed on both sides of the northern section of the fault,and the strain values gradually decrease when they are getting further away from the fault body; ②The disturbance of the pore pressure in the confined aquifer in the study area caused by the earthquake returns to the normal state in 50 days after the Ludian earthquake,and the diffusion time of the pore pressure is affected by the permeability coefficient(K)and Young’s modulus(E); ③The simulated water level in Huize Well rises by 0.45 m instantaneously due to the Ludian earthquake,and returns to a normal level 50 days after the earthquake.The simulated coseismic variation of the water level is similar to the actual coseismic variation of the water level in Huize well.

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Last Update: 2022-05-20