鲁14井数字化水位潮汐响应特性初析

以井—含水层系统潮汐理论为基础，利用Baytap-G潮汐分析程序计算鲁14井数字化水位的潮汐响应特征参数，提取井水位潮汐因子和相位差，分析远场大震前后井水位潮汐响应特征参数的变化情况，同时对固体潮和气压影响量进行分离，以期深入了解井水位微动态变化特征，为该井水位观测资料的动态评价和效能评估提供参考。结果表明：鲁14井潮汐地下水流类型以径向流为主，潮汐因子和相位差变化相对稳定，但受远场大震影响显著，其含水层渗透性随潮汐参数的增大（减小）而增大（减小）；地震波作用可使含水层渗透性发生变化，但并非导致含水层渗透性变化的主要因素。

Analysis of the tidal response characteristics of digital water level observation in Lu 14 well

Based on the tidal theory of the well-aquifer system, the characteristic parameters of the tidal response of Lu 14 well digital water level observation were calculated using Baytap-G, the tidal factor and phase difference of the water level observation were also extracted. We analyzed the variation of characteristic parameters of the tidal response of well water levels before and after large teleseismic earthquakes. At the same time, the influence of earth tide and air pressure were separated in order to understand the micro-dynamic variation characteristics of well water level and provide a reference for dynamic evaluation and effectiveness evaluation of water level observation data. The results show that:the main type of tidal groundwater flow in the Lu 14 well is radial flow, and the change of tidal factor and the phase difference is relatively stable, but it is significantly affected by large teleseismic earthquakes, and its aquifer permeability increases (decreases) with the increase (decrease) of tidal parameters; seismic wave could change the aquifer permeability, but it is not the main factor leading to the change of aquifer permeability.