断裂带渗透率是研究断层稳定性和水文循环过程的关键参数之一，地震可引起断裂带岩土介质渗透率的变化，进而影响断裂带内的流体运移状态。基于概化模型建立的井—含水层系统对地震作用的响应机理，无法合理解释地震引起的断裂带地下水动态响应现象，断裂带渗透率变化对地下水动态响应的影响不容忽视。本项目拟选取有地下水动态监测的断裂带，利用多种方法获取断裂带含水层的渗透性参数，考虑断裂带与井—含水层系统的水力联系和受力状态，分析近场和远场地震引起的断裂带渗透率时空变化特征，研究静态和动态应力对断裂带地下水流动状态和水岩相互作用的影响机制，力求揭示地震引起的断裂带地下水动态响应机理。项目研究成果，可为评估断裂带对地下水运移模式的影响提供理论基础，对于理解地震孕育和发生过程中断裂带的变形特征和受力状态具有重要的科学意义。

The permeability in fault zone is one of the key physical parameters for studying fault stability and hydrological cycle. Earthquake can change the permeability of rock and soil in the fault zone, and then affect the fluid migration along it. The response mechanism of well-aquifer system established based on the generalized model to seismic loading cannot explain the dynamic response phenomenon of groundwater in fault zone caused by earthquake, and the response of groundwater due to permeability change in fault zone cannot be ignored. Two fault zones with dynamic groundwater monitoring are selected, and the permeability parameters of the aquifer in those fault zones will be estimated using a variety of methods. By considering the stress state and the hydraulic relationship between the fault zone and the well-aquifer system, the spatial-temporal variation of the permeability in fault zone caused by near-field and far-field earthquakes will be analyzed, and the influence mechanism of static and dynamic stress on the groundwater flow and water-rock interaction will be studied too, in order to reveal the mechanism of groundwater dynamic response in fault zone caused by earthquakes. The results of the project can provide a theoretical basis for evaluating the effect of fault zone on groundwater flow, and have important scientific significance for understanding the deformation characteristics and stress state of fault zone during earthquake preparation and occurrence.